BITS PilaniHyderabad Campus
Characterisation of Natural fibres for Composite applications
Dr Ramesh AdusumalliDepartment of Chemical Engineering
Polymer Matrix Composites (PMC)
- Low modulus matrix
- High modulus fibers
bull High potential for lightweight constructions
bull Tailoring of properties in user-defined way
bull High damping properties
bull Good corrosion resistance
bull Environmental toxicity
bull Production and life cycle costs
01082012 2National Conference on Recent advances in
Composites - Hyderabad
COMPOSITE MATERIALS
Fiber-reinforced Polymer composites used in 2002
Aerospace
1Appliances
8
Consumer
products
8
Electronic
components
10Marine
12
Miscellaneous
4
Construction
26
Automotives
31
Introduction Polymer Composites
Glass Fiber Reinforced Polymer composites ndash GFRP
Carbon Fiber Reinforced Polymer Composites ndash CFRP
Aramid Fiber Reinforced Polymer composites-AFRP
Glass fibers are used in 95 of the cases to reinforce plastics
Market 22 Million tones (2002)
Source Mohanty Misra Drzal Natural fibers Biopolymers and Biocomposites 2005
End-of-life vehicles regulation (ELV) and ldquoEuropean Composite Recycling Conceptrdquo imposed significant and strict regulations on composite waste management
Starting from 2006 at least 85 of the average weight of an old vehicle are to be used or reused to at least 80 materially or rawmaterially
Till 2015 these utilization must be increased up to 95 (utilization) andor 85 (material utilization and re-use)
European legislation
Material utilization and re-use
Utilization
landfill
Thermal utilization
Is there any alternative to glass fibres in polymer composites
Flax Ramie Jute (Bast fibres)
bull Front door liners 12 to 18 kg
bull Rear door liners 08 to 15 kg
bull Boot liners 15 to 25 kg
bull Parcel shelves lt2 kg
bull Seat backs 16 to 20 kg
bull Sunroof interior shields lt04 kg
bull Headrests ~25 kg
1 Annual growing raw material up to two cropsa
2 Low costs05 to 1 eurokg compared to 2 eurokg for glass fibers
3 Low density1500 kgm3 glass 2500 kgm3
4 Fibers act non-abrasive
5 Low energy consumptionone-fifth of fiber glass production
6 Physiological harmlessnessno skin irritation
7 CO2-neutrality when incinerated
8 Residual free thermal utilization
9 Safer crash behavior (high stability and absence of splintering
10 Environmental Regulations (end-of-life vehicle regulation ELV)
Replace Glass fibres with Flax Hemp etc - BIOCOMPOSITES
Money spent to reduce the 1 kilo weight
Space agencies 25000 Euro
Aeronautics 250 - 750 Euro
Automobile 0 - 25 Euro
Cost E54WG2 17102008 Budapest Micromechanics of single Pulp Fibres
7
Single Fibre testing
bullDirect gripping (ASTM D 3822) Standard test
method for tensile properties of single textile fibres
- Viscose rayon Flax Polyester
bull Paper frame set-up (ASTM D 3379-75) Standard
method for tensile strength and youngs modulus of
single technical fibres
- Glass Carbon Aramid
Paper frame set-upDirect gripping
To avoid the slippage problem and for better accuracy in E-modulus measurement ltlt Paper frame set-up gtgt is adopted for single pulp fibre testing
Ball and
socket
method
Courtesy Dr Navi and Dr Sedighi-Gilani from EPFL (CH) Prof Gindl from BOKU (A)
Gauge length 20 mm (Paper frame)
Gauge length 50 mm (Direct gripping)
Single fibre tensile properties
200
300
400
500
600
700
800
8 13 18 23 28 33 38 43
Specific modulus [GPa gcm-3
]
Sp
ec
ific
str
en
gth
[M
Pa
g
cm
-3]
Flax
Lyocell
Rayon tirecord
Glass
Carbon X = 127 Y = 2440
Carbon
Modal
Viscose
01082012 8National Conference on Recent advances in
Composites - Hyderabad
9
Viscose (Rayon) and Lyocell fibres
Kraft or Chemical pulping
uses NaOH and Na2S
here Lignin is completely
removed It accounts for
70 pulp production
Pulping cooking aims to separate cellulose fibers from the wood structure
Mechanical pulping
involves metal disks
which grinds the wood
here lignin is partially
removed
Raw Cellulose (I) -
Unpurified
Regenerated Cellulose (II)
- Purifed
RegenerationPulping
Lenzing AG
Mechanical properties of
Cellulose (I) gtgt Cellulose (II)
01082012National Conference on Recent advances in
Composites - Hyderabad
BIRLA Cellulose
Composite Manufacturing
Epoxy resin 80 degrees 1-2 hours
Fibre volume content - 55
Needle punched nonwoven mats
Adding the thermoset resin
Fibre rovings
01082012 10National Conference on Recent advances in
Composites - Hyderabad
Fibre - Matrix adhesion determinationMicrolevel Microbond test
Interfacial shear strength is measured
Macrolevel-1 Scanning electron mictoscopy
Fibre pull-out is considered
Macrolevel-2 Double notch shear test
Interlaminar shear strength is measured
Epoxy droplet on lyocell fibre SEM fractograph of lyocell-epoxy
Shear test of lyocell-epoxy composite specimen
01082012 11National Conference on Recent advances in
Composites - Hyderabad
Droplet on lyocell fiberDroplet formationPP trousers
Microbond technique
l d ratio for lyocell-PP ~ 20
l d ratio for glass-PP ~ 80
πdl
Fτ
= Interfacial shear strengthF = Maximum load prior to de-bondingd = fibre diameterl = fibre embedded length
τ
5 5 5
82
020 Fibre with
PP drop
5 5 55 5 5
82
020 Fibre with
PP drop
l
Carbide cutter
edges
Detail
d
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Lyocell-MAH-PP - PP
0
40
80
120
160
200
240
0 1 2 3 4 5 6 7
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS - 53 MPa
IFSS - 83 MPa
Influence of fibre modification (MAH) is quantitatively observed
01082012 12National Conference on Recent advances in
Composites - Hyderabad
Debonding in Microbond test
0
4
8
12
16
20
24
28
32
36
0 2 4 6 8 10 12 14 16 18
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Micromodal-PP
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
300
00 05 10 15 20 25 30 35 40 45 50
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Glass-Epoxy
B
AC
D
E
F
01082012 13National Conference on Recent advances in
Composites - Hyderabad
14
0
20
40
60
80
100
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
0 1 2 3 4 5 6 7 8 9
Displacement ()
IFSS 28 MPa
IFSS 70 MPa
(C)(A) (B)
0
40
80
120
160
200
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS 45 MPa
( l )
(F)
(d)
Deb
on
din
g f
orc
e (m
N)
Displacement () Displacement () Displacement ()
Fibre-Matrix adhesion comparison
Hemp-epoxy Lyocell-epoxy
0
5
10
15
20
25
30
35
40
45
Hemp-Epoxy Lyocell-Epoxy Glass-Epoxy
Sh
ea
r s
tre
ng
th (
MP
a)
Double-notched shear test (macro) Microbond test (micro)
Microbond shear strength values are under estimated for lyocell-epoxy due to the low tensile strength of lyocell
No mechanical bonding is existing between lyocell-epoxy due to the high fibrillation resistance of lyocell fibres
0
100
200
300
400
500
600
0 2 4 6 8Elongation ()
Tensile
str
en
gth
(M
Pa)
Lyocell-Epoxy
Tirecord-Epoxy
Hemp-Epoxy
Glass-Epoxy
Tensile properties of unidirectional composite
0
5
10
15
20
25
30
35
40
45
Tirecord Lyocell Lyocell-S Hemp Glass
Ten
sile m
od
ulu
s (
GP
a)
Average modulus
Specific modulus
01082012 16National Conference on Recent advances in
Composites - Hyderabad
0
100
200
300
400
500
600
700
800
900
1000
Lyocell Flax Hemp GlassF
lexu
ral str
en
gth
(M
Pa
)
Average bending strength
Specific bending strength
0
5
10
15
20
25
30
35
40
Lyocell Flax Hemp Glass
Fle
xu
ral m
od
ulu
s (
GP
a)
Average flexural modulus
Specific flexural modulus
Bending properties of unidirectional epoxy composite
01082012 17National Conference on Recent advances in
Composites - Hyderabad
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
Polymer Matrix Composites (PMC)
- Low modulus matrix
- High modulus fibers
bull High potential for lightweight constructions
bull Tailoring of properties in user-defined way
bull High damping properties
bull Good corrosion resistance
bull Environmental toxicity
bull Production and life cycle costs
01082012 2National Conference on Recent advances in
Composites - Hyderabad
COMPOSITE MATERIALS
Fiber-reinforced Polymer composites used in 2002
Aerospace
1Appliances
8
Consumer
products
8
Electronic
components
10Marine
12
Miscellaneous
4
Construction
26
Automotives
31
Introduction Polymer Composites
Glass Fiber Reinforced Polymer composites ndash GFRP
Carbon Fiber Reinforced Polymer Composites ndash CFRP
Aramid Fiber Reinforced Polymer composites-AFRP
Glass fibers are used in 95 of the cases to reinforce plastics
Market 22 Million tones (2002)
Source Mohanty Misra Drzal Natural fibers Biopolymers and Biocomposites 2005
End-of-life vehicles regulation (ELV) and ldquoEuropean Composite Recycling Conceptrdquo imposed significant and strict regulations on composite waste management
Starting from 2006 at least 85 of the average weight of an old vehicle are to be used or reused to at least 80 materially or rawmaterially
Till 2015 these utilization must be increased up to 95 (utilization) andor 85 (material utilization and re-use)
European legislation
Material utilization and re-use
Utilization
landfill
Thermal utilization
Is there any alternative to glass fibres in polymer composites
Flax Ramie Jute (Bast fibres)
bull Front door liners 12 to 18 kg
bull Rear door liners 08 to 15 kg
bull Boot liners 15 to 25 kg
bull Parcel shelves lt2 kg
bull Seat backs 16 to 20 kg
bull Sunroof interior shields lt04 kg
bull Headrests ~25 kg
1 Annual growing raw material up to two cropsa
2 Low costs05 to 1 eurokg compared to 2 eurokg for glass fibers
3 Low density1500 kgm3 glass 2500 kgm3
4 Fibers act non-abrasive
5 Low energy consumptionone-fifth of fiber glass production
6 Physiological harmlessnessno skin irritation
7 CO2-neutrality when incinerated
8 Residual free thermal utilization
9 Safer crash behavior (high stability and absence of splintering
10 Environmental Regulations (end-of-life vehicle regulation ELV)
Replace Glass fibres with Flax Hemp etc - BIOCOMPOSITES
Money spent to reduce the 1 kilo weight
Space agencies 25000 Euro
Aeronautics 250 - 750 Euro
Automobile 0 - 25 Euro
Cost E54WG2 17102008 Budapest Micromechanics of single Pulp Fibres
7
Single Fibre testing
bullDirect gripping (ASTM D 3822) Standard test
method for tensile properties of single textile fibres
- Viscose rayon Flax Polyester
bull Paper frame set-up (ASTM D 3379-75) Standard
method for tensile strength and youngs modulus of
single technical fibres
- Glass Carbon Aramid
Paper frame set-upDirect gripping
To avoid the slippage problem and for better accuracy in E-modulus measurement ltlt Paper frame set-up gtgt is adopted for single pulp fibre testing
Ball and
socket
method
Courtesy Dr Navi and Dr Sedighi-Gilani from EPFL (CH) Prof Gindl from BOKU (A)
Gauge length 20 mm (Paper frame)
Gauge length 50 mm (Direct gripping)
Single fibre tensile properties
200
300
400
500
600
700
800
8 13 18 23 28 33 38 43
Specific modulus [GPa gcm-3
]
Sp
ec
ific
str
en
gth
[M
Pa
g
cm
-3]
Flax
Lyocell
Rayon tirecord
Glass
Carbon X = 127 Y = 2440
Carbon
Modal
Viscose
01082012 8National Conference on Recent advances in
Composites - Hyderabad
9
Viscose (Rayon) and Lyocell fibres
Kraft or Chemical pulping
uses NaOH and Na2S
here Lignin is completely
removed It accounts for
70 pulp production
Pulping cooking aims to separate cellulose fibers from the wood structure
Mechanical pulping
involves metal disks
which grinds the wood
here lignin is partially
removed
Raw Cellulose (I) -
Unpurified
Regenerated Cellulose (II)
- Purifed
RegenerationPulping
Lenzing AG
Mechanical properties of
Cellulose (I) gtgt Cellulose (II)
01082012National Conference on Recent advances in
Composites - Hyderabad
BIRLA Cellulose
Composite Manufacturing
Epoxy resin 80 degrees 1-2 hours
Fibre volume content - 55
Needle punched nonwoven mats
Adding the thermoset resin
Fibre rovings
01082012 10National Conference on Recent advances in
Composites - Hyderabad
Fibre - Matrix adhesion determinationMicrolevel Microbond test
Interfacial shear strength is measured
Macrolevel-1 Scanning electron mictoscopy
Fibre pull-out is considered
Macrolevel-2 Double notch shear test
Interlaminar shear strength is measured
Epoxy droplet on lyocell fibre SEM fractograph of lyocell-epoxy
Shear test of lyocell-epoxy composite specimen
01082012 11National Conference on Recent advances in
Composites - Hyderabad
Droplet on lyocell fiberDroplet formationPP trousers
Microbond technique
l d ratio for lyocell-PP ~ 20
l d ratio for glass-PP ~ 80
πdl
Fτ
= Interfacial shear strengthF = Maximum load prior to de-bondingd = fibre diameterl = fibre embedded length
τ
5 5 5
82
020 Fibre with
PP drop
5 5 55 5 5
82
020 Fibre with
PP drop
l
Carbide cutter
edges
Detail
d
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Lyocell-MAH-PP - PP
0
40
80
120
160
200
240
0 1 2 3 4 5 6 7
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS - 53 MPa
IFSS - 83 MPa
Influence of fibre modification (MAH) is quantitatively observed
01082012 12National Conference on Recent advances in
Composites - Hyderabad
Debonding in Microbond test
0
4
8
12
16
20
24
28
32
36
0 2 4 6 8 10 12 14 16 18
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Micromodal-PP
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
300
00 05 10 15 20 25 30 35 40 45 50
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Glass-Epoxy
B
AC
D
E
F
01082012 13National Conference on Recent advances in
Composites - Hyderabad
14
0
20
40
60
80
100
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
0 1 2 3 4 5 6 7 8 9
Displacement ()
IFSS 28 MPa
IFSS 70 MPa
(C)(A) (B)
0
40
80
120
160
200
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS 45 MPa
( l )
(F)
(d)
Deb
on
din
g f
orc
e (m
N)
Displacement () Displacement () Displacement ()
Fibre-Matrix adhesion comparison
Hemp-epoxy Lyocell-epoxy
0
5
10
15
20
25
30
35
40
45
Hemp-Epoxy Lyocell-Epoxy Glass-Epoxy
Sh
ea
r s
tre
ng
th (
MP
a)
Double-notched shear test (macro) Microbond test (micro)
Microbond shear strength values are under estimated for lyocell-epoxy due to the low tensile strength of lyocell
No mechanical bonding is existing between lyocell-epoxy due to the high fibrillation resistance of lyocell fibres
0
100
200
300
400
500
600
0 2 4 6 8Elongation ()
Tensile
str
en
gth
(M
Pa)
Lyocell-Epoxy
Tirecord-Epoxy
Hemp-Epoxy
Glass-Epoxy
Tensile properties of unidirectional composite
0
5
10
15
20
25
30
35
40
45
Tirecord Lyocell Lyocell-S Hemp Glass
Ten
sile m
od
ulu
s (
GP
a)
Average modulus
Specific modulus
01082012 16National Conference on Recent advances in
Composites - Hyderabad
0
100
200
300
400
500
600
700
800
900
1000
Lyocell Flax Hemp GlassF
lexu
ral str
en
gth
(M
Pa
)
Average bending strength
Specific bending strength
0
5
10
15
20
25
30
35
40
Lyocell Flax Hemp Glass
Fle
xu
ral m
od
ulu
s (
GP
a)
Average flexural modulus
Specific flexural modulus
Bending properties of unidirectional epoxy composite
01082012 17National Conference on Recent advances in
Composites - Hyderabad
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
Fiber-reinforced Polymer composites used in 2002
Aerospace
1Appliances
8
Consumer
products
8
Electronic
components
10Marine
12
Miscellaneous
4
Construction
26
Automotives
31
Introduction Polymer Composites
Glass Fiber Reinforced Polymer composites ndash GFRP
Carbon Fiber Reinforced Polymer Composites ndash CFRP
Aramid Fiber Reinforced Polymer composites-AFRP
Glass fibers are used in 95 of the cases to reinforce plastics
Market 22 Million tones (2002)
Source Mohanty Misra Drzal Natural fibers Biopolymers and Biocomposites 2005
End-of-life vehicles regulation (ELV) and ldquoEuropean Composite Recycling Conceptrdquo imposed significant and strict regulations on composite waste management
Starting from 2006 at least 85 of the average weight of an old vehicle are to be used or reused to at least 80 materially or rawmaterially
Till 2015 these utilization must be increased up to 95 (utilization) andor 85 (material utilization and re-use)
European legislation
Material utilization and re-use
Utilization
landfill
Thermal utilization
Is there any alternative to glass fibres in polymer composites
Flax Ramie Jute (Bast fibres)
bull Front door liners 12 to 18 kg
bull Rear door liners 08 to 15 kg
bull Boot liners 15 to 25 kg
bull Parcel shelves lt2 kg
bull Seat backs 16 to 20 kg
bull Sunroof interior shields lt04 kg
bull Headrests ~25 kg
1 Annual growing raw material up to two cropsa
2 Low costs05 to 1 eurokg compared to 2 eurokg for glass fibers
3 Low density1500 kgm3 glass 2500 kgm3
4 Fibers act non-abrasive
5 Low energy consumptionone-fifth of fiber glass production
6 Physiological harmlessnessno skin irritation
7 CO2-neutrality when incinerated
8 Residual free thermal utilization
9 Safer crash behavior (high stability and absence of splintering
10 Environmental Regulations (end-of-life vehicle regulation ELV)
Replace Glass fibres with Flax Hemp etc - BIOCOMPOSITES
Money spent to reduce the 1 kilo weight
Space agencies 25000 Euro
Aeronautics 250 - 750 Euro
Automobile 0 - 25 Euro
Cost E54WG2 17102008 Budapest Micromechanics of single Pulp Fibres
7
Single Fibre testing
bullDirect gripping (ASTM D 3822) Standard test
method for tensile properties of single textile fibres
- Viscose rayon Flax Polyester
bull Paper frame set-up (ASTM D 3379-75) Standard
method for tensile strength and youngs modulus of
single technical fibres
- Glass Carbon Aramid
Paper frame set-upDirect gripping
To avoid the slippage problem and for better accuracy in E-modulus measurement ltlt Paper frame set-up gtgt is adopted for single pulp fibre testing
Ball and
socket
method
Courtesy Dr Navi and Dr Sedighi-Gilani from EPFL (CH) Prof Gindl from BOKU (A)
Gauge length 20 mm (Paper frame)
Gauge length 50 mm (Direct gripping)
Single fibre tensile properties
200
300
400
500
600
700
800
8 13 18 23 28 33 38 43
Specific modulus [GPa gcm-3
]
Sp
ec
ific
str
en
gth
[M
Pa
g
cm
-3]
Flax
Lyocell
Rayon tirecord
Glass
Carbon X = 127 Y = 2440
Carbon
Modal
Viscose
01082012 8National Conference on Recent advances in
Composites - Hyderabad
9
Viscose (Rayon) and Lyocell fibres
Kraft or Chemical pulping
uses NaOH and Na2S
here Lignin is completely
removed It accounts for
70 pulp production
Pulping cooking aims to separate cellulose fibers from the wood structure
Mechanical pulping
involves metal disks
which grinds the wood
here lignin is partially
removed
Raw Cellulose (I) -
Unpurified
Regenerated Cellulose (II)
- Purifed
RegenerationPulping
Lenzing AG
Mechanical properties of
Cellulose (I) gtgt Cellulose (II)
01082012National Conference on Recent advances in
Composites - Hyderabad
BIRLA Cellulose
Composite Manufacturing
Epoxy resin 80 degrees 1-2 hours
Fibre volume content - 55
Needle punched nonwoven mats
Adding the thermoset resin
Fibre rovings
01082012 10National Conference on Recent advances in
Composites - Hyderabad
Fibre - Matrix adhesion determinationMicrolevel Microbond test
Interfacial shear strength is measured
Macrolevel-1 Scanning electron mictoscopy
Fibre pull-out is considered
Macrolevel-2 Double notch shear test
Interlaminar shear strength is measured
Epoxy droplet on lyocell fibre SEM fractograph of lyocell-epoxy
Shear test of lyocell-epoxy composite specimen
01082012 11National Conference on Recent advances in
Composites - Hyderabad
Droplet on lyocell fiberDroplet formationPP trousers
Microbond technique
l d ratio for lyocell-PP ~ 20
l d ratio for glass-PP ~ 80
πdl
Fτ
= Interfacial shear strengthF = Maximum load prior to de-bondingd = fibre diameterl = fibre embedded length
τ
5 5 5
82
020 Fibre with
PP drop
5 5 55 5 5
82
020 Fibre with
PP drop
l
Carbide cutter
edges
Detail
d
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Lyocell-MAH-PP - PP
0
40
80
120
160
200
240
0 1 2 3 4 5 6 7
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS - 53 MPa
IFSS - 83 MPa
Influence of fibre modification (MAH) is quantitatively observed
01082012 12National Conference on Recent advances in
Composites - Hyderabad
Debonding in Microbond test
0
4
8
12
16
20
24
28
32
36
0 2 4 6 8 10 12 14 16 18
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Micromodal-PP
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
300
00 05 10 15 20 25 30 35 40 45 50
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Glass-Epoxy
B
AC
D
E
F
01082012 13National Conference on Recent advances in
Composites - Hyderabad
14
0
20
40
60
80
100
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
0 1 2 3 4 5 6 7 8 9
Displacement ()
IFSS 28 MPa
IFSS 70 MPa
(C)(A) (B)
0
40
80
120
160
200
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS 45 MPa
( l )
(F)
(d)
Deb
on
din
g f
orc
e (m
N)
Displacement () Displacement () Displacement ()
Fibre-Matrix adhesion comparison
Hemp-epoxy Lyocell-epoxy
0
5
10
15
20
25
30
35
40
45
Hemp-Epoxy Lyocell-Epoxy Glass-Epoxy
Sh
ea
r s
tre
ng
th (
MP
a)
Double-notched shear test (macro) Microbond test (micro)
Microbond shear strength values are under estimated for lyocell-epoxy due to the low tensile strength of lyocell
No mechanical bonding is existing between lyocell-epoxy due to the high fibrillation resistance of lyocell fibres
0
100
200
300
400
500
600
0 2 4 6 8Elongation ()
Tensile
str
en
gth
(M
Pa)
Lyocell-Epoxy
Tirecord-Epoxy
Hemp-Epoxy
Glass-Epoxy
Tensile properties of unidirectional composite
0
5
10
15
20
25
30
35
40
45
Tirecord Lyocell Lyocell-S Hemp Glass
Ten
sile m
od
ulu
s (
GP
a)
Average modulus
Specific modulus
01082012 16National Conference on Recent advances in
Composites - Hyderabad
0
100
200
300
400
500
600
700
800
900
1000
Lyocell Flax Hemp GlassF
lexu
ral str
en
gth
(M
Pa
)
Average bending strength
Specific bending strength
0
5
10
15
20
25
30
35
40
Lyocell Flax Hemp Glass
Fle
xu
ral m
od
ulu
s (
GP
a)
Average flexural modulus
Specific flexural modulus
Bending properties of unidirectional epoxy composite
01082012 17National Conference on Recent advances in
Composites - Hyderabad
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
End-of-life vehicles regulation (ELV) and ldquoEuropean Composite Recycling Conceptrdquo imposed significant and strict regulations on composite waste management
Starting from 2006 at least 85 of the average weight of an old vehicle are to be used or reused to at least 80 materially or rawmaterially
Till 2015 these utilization must be increased up to 95 (utilization) andor 85 (material utilization and re-use)
European legislation
Material utilization and re-use
Utilization
landfill
Thermal utilization
Is there any alternative to glass fibres in polymer composites
Flax Ramie Jute (Bast fibres)
bull Front door liners 12 to 18 kg
bull Rear door liners 08 to 15 kg
bull Boot liners 15 to 25 kg
bull Parcel shelves lt2 kg
bull Seat backs 16 to 20 kg
bull Sunroof interior shields lt04 kg
bull Headrests ~25 kg
1 Annual growing raw material up to two cropsa
2 Low costs05 to 1 eurokg compared to 2 eurokg for glass fibers
3 Low density1500 kgm3 glass 2500 kgm3
4 Fibers act non-abrasive
5 Low energy consumptionone-fifth of fiber glass production
6 Physiological harmlessnessno skin irritation
7 CO2-neutrality when incinerated
8 Residual free thermal utilization
9 Safer crash behavior (high stability and absence of splintering
10 Environmental Regulations (end-of-life vehicle regulation ELV)
Replace Glass fibres with Flax Hemp etc - BIOCOMPOSITES
Money spent to reduce the 1 kilo weight
Space agencies 25000 Euro
Aeronautics 250 - 750 Euro
Automobile 0 - 25 Euro
Cost E54WG2 17102008 Budapest Micromechanics of single Pulp Fibres
7
Single Fibre testing
bullDirect gripping (ASTM D 3822) Standard test
method for tensile properties of single textile fibres
- Viscose rayon Flax Polyester
bull Paper frame set-up (ASTM D 3379-75) Standard
method for tensile strength and youngs modulus of
single technical fibres
- Glass Carbon Aramid
Paper frame set-upDirect gripping
To avoid the slippage problem and for better accuracy in E-modulus measurement ltlt Paper frame set-up gtgt is adopted for single pulp fibre testing
Ball and
socket
method
Courtesy Dr Navi and Dr Sedighi-Gilani from EPFL (CH) Prof Gindl from BOKU (A)
Gauge length 20 mm (Paper frame)
Gauge length 50 mm (Direct gripping)
Single fibre tensile properties
200
300
400
500
600
700
800
8 13 18 23 28 33 38 43
Specific modulus [GPa gcm-3
]
Sp
ec
ific
str
en
gth
[M
Pa
g
cm
-3]
Flax
Lyocell
Rayon tirecord
Glass
Carbon X = 127 Y = 2440
Carbon
Modal
Viscose
01082012 8National Conference on Recent advances in
Composites - Hyderabad
9
Viscose (Rayon) and Lyocell fibres
Kraft or Chemical pulping
uses NaOH and Na2S
here Lignin is completely
removed It accounts for
70 pulp production
Pulping cooking aims to separate cellulose fibers from the wood structure
Mechanical pulping
involves metal disks
which grinds the wood
here lignin is partially
removed
Raw Cellulose (I) -
Unpurified
Regenerated Cellulose (II)
- Purifed
RegenerationPulping
Lenzing AG
Mechanical properties of
Cellulose (I) gtgt Cellulose (II)
01082012National Conference on Recent advances in
Composites - Hyderabad
BIRLA Cellulose
Composite Manufacturing
Epoxy resin 80 degrees 1-2 hours
Fibre volume content - 55
Needle punched nonwoven mats
Adding the thermoset resin
Fibre rovings
01082012 10National Conference on Recent advances in
Composites - Hyderabad
Fibre - Matrix adhesion determinationMicrolevel Microbond test
Interfacial shear strength is measured
Macrolevel-1 Scanning electron mictoscopy
Fibre pull-out is considered
Macrolevel-2 Double notch shear test
Interlaminar shear strength is measured
Epoxy droplet on lyocell fibre SEM fractograph of lyocell-epoxy
Shear test of lyocell-epoxy composite specimen
01082012 11National Conference on Recent advances in
Composites - Hyderabad
Droplet on lyocell fiberDroplet formationPP trousers
Microbond technique
l d ratio for lyocell-PP ~ 20
l d ratio for glass-PP ~ 80
πdl
Fτ
= Interfacial shear strengthF = Maximum load prior to de-bondingd = fibre diameterl = fibre embedded length
τ
5 5 5
82
020 Fibre with
PP drop
5 5 55 5 5
82
020 Fibre with
PP drop
l
Carbide cutter
edges
Detail
d
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Lyocell-MAH-PP - PP
0
40
80
120
160
200
240
0 1 2 3 4 5 6 7
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS - 53 MPa
IFSS - 83 MPa
Influence of fibre modification (MAH) is quantitatively observed
01082012 12National Conference on Recent advances in
Composites - Hyderabad
Debonding in Microbond test
0
4
8
12
16
20
24
28
32
36
0 2 4 6 8 10 12 14 16 18
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Micromodal-PP
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
300
00 05 10 15 20 25 30 35 40 45 50
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Glass-Epoxy
B
AC
D
E
F
01082012 13National Conference on Recent advances in
Composites - Hyderabad
14
0
20
40
60
80
100
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
0 1 2 3 4 5 6 7 8 9
Displacement ()
IFSS 28 MPa
IFSS 70 MPa
(C)(A) (B)
0
40
80
120
160
200
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS 45 MPa
( l )
(F)
(d)
Deb
on
din
g f
orc
e (m
N)
Displacement () Displacement () Displacement ()
Fibre-Matrix adhesion comparison
Hemp-epoxy Lyocell-epoxy
0
5
10
15
20
25
30
35
40
45
Hemp-Epoxy Lyocell-Epoxy Glass-Epoxy
Sh
ea
r s
tre
ng
th (
MP
a)
Double-notched shear test (macro) Microbond test (micro)
Microbond shear strength values are under estimated for lyocell-epoxy due to the low tensile strength of lyocell
No mechanical bonding is existing between lyocell-epoxy due to the high fibrillation resistance of lyocell fibres
0
100
200
300
400
500
600
0 2 4 6 8Elongation ()
Tensile
str
en
gth
(M
Pa)
Lyocell-Epoxy
Tirecord-Epoxy
Hemp-Epoxy
Glass-Epoxy
Tensile properties of unidirectional composite
0
5
10
15
20
25
30
35
40
45
Tirecord Lyocell Lyocell-S Hemp Glass
Ten
sile m
od
ulu
s (
GP
a)
Average modulus
Specific modulus
01082012 16National Conference on Recent advances in
Composites - Hyderabad
0
100
200
300
400
500
600
700
800
900
1000
Lyocell Flax Hemp GlassF
lexu
ral str
en
gth
(M
Pa
)
Average bending strength
Specific bending strength
0
5
10
15
20
25
30
35
40
Lyocell Flax Hemp Glass
Fle
xu
ral m
od
ulu
s (
GP
a)
Average flexural modulus
Specific flexural modulus
Bending properties of unidirectional epoxy composite
01082012 17National Conference on Recent advances in
Composites - Hyderabad
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
Is there any alternative to glass fibres in polymer composites
Flax Ramie Jute (Bast fibres)
bull Front door liners 12 to 18 kg
bull Rear door liners 08 to 15 kg
bull Boot liners 15 to 25 kg
bull Parcel shelves lt2 kg
bull Seat backs 16 to 20 kg
bull Sunroof interior shields lt04 kg
bull Headrests ~25 kg
1 Annual growing raw material up to two cropsa
2 Low costs05 to 1 eurokg compared to 2 eurokg for glass fibers
3 Low density1500 kgm3 glass 2500 kgm3
4 Fibers act non-abrasive
5 Low energy consumptionone-fifth of fiber glass production
6 Physiological harmlessnessno skin irritation
7 CO2-neutrality when incinerated
8 Residual free thermal utilization
9 Safer crash behavior (high stability and absence of splintering
10 Environmental Regulations (end-of-life vehicle regulation ELV)
Replace Glass fibres with Flax Hemp etc - BIOCOMPOSITES
Money spent to reduce the 1 kilo weight
Space agencies 25000 Euro
Aeronautics 250 - 750 Euro
Automobile 0 - 25 Euro
Cost E54WG2 17102008 Budapest Micromechanics of single Pulp Fibres
7
Single Fibre testing
bullDirect gripping (ASTM D 3822) Standard test
method for tensile properties of single textile fibres
- Viscose rayon Flax Polyester
bull Paper frame set-up (ASTM D 3379-75) Standard
method for tensile strength and youngs modulus of
single technical fibres
- Glass Carbon Aramid
Paper frame set-upDirect gripping
To avoid the slippage problem and for better accuracy in E-modulus measurement ltlt Paper frame set-up gtgt is adopted for single pulp fibre testing
Ball and
socket
method
Courtesy Dr Navi and Dr Sedighi-Gilani from EPFL (CH) Prof Gindl from BOKU (A)
Gauge length 20 mm (Paper frame)
Gauge length 50 mm (Direct gripping)
Single fibre tensile properties
200
300
400
500
600
700
800
8 13 18 23 28 33 38 43
Specific modulus [GPa gcm-3
]
Sp
ec
ific
str
en
gth
[M
Pa
g
cm
-3]
Flax
Lyocell
Rayon tirecord
Glass
Carbon X = 127 Y = 2440
Carbon
Modal
Viscose
01082012 8National Conference on Recent advances in
Composites - Hyderabad
9
Viscose (Rayon) and Lyocell fibres
Kraft or Chemical pulping
uses NaOH and Na2S
here Lignin is completely
removed It accounts for
70 pulp production
Pulping cooking aims to separate cellulose fibers from the wood structure
Mechanical pulping
involves metal disks
which grinds the wood
here lignin is partially
removed
Raw Cellulose (I) -
Unpurified
Regenerated Cellulose (II)
- Purifed
RegenerationPulping
Lenzing AG
Mechanical properties of
Cellulose (I) gtgt Cellulose (II)
01082012National Conference on Recent advances in
Composites - Hyderabad
BIRLA Cellulose
Composite Manufacturing
Epoxy resin 80 degrees 1-2 hours
Fibre volume content - 55
Needle punched nonwoven mats
Adding the thermoset resin
Fibre rovings
01082012 10National Conference on Recent advances in
Composites - Hyderabad
Fibre - Matrix adhesion determinationMicrolevel Microbond test
Interfacial shear strength is measured
Macrolevel-1 Scanning electron mictoscopy
Fibre pull-out is considered
Macrolevel-2 Double notch shear test
Interlaminar shear strength is measured
Epoxy droplet on lyocell fibre SEM fractograph of lyocell-epoxy
Shear test of lyocell-epoxy composite specimen
01082012 11National Conference on Recent advances in
Composites - Hyderabad
Droplet on lyocell fiberDroplet formationPP trousers
Microbond technique
l d ratio for lyocell-PP ~ 20
l d ratio for glass-PP ~ 80
πdl
Fτ
= Interfacial shear strengthF = Maximum load prior to de-bondingd = fibre diameterl = fibre embedded length
τ
5 5 5
82
020 Fibre with
PP drop
5 5 55 5 5
82
020 Fibre with
PP drop
l
Carbide cutter
edges
Detail
d
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Lyocell-MAH-PP - PP
0
40
80
120
160
200
240
0 1 2 3 4 5 6 7
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS - 53 MPa
IFSS - 83 MPa
Influence of fibre modification (MAH) is quantitatively observed
01082012 12National Conference on Recent advances in
Composites - Hyderabad
Debonding in Microbond test
0
4
8
12
16
20
24
28
32
36
0 2 4 6 8 10 12 14 16 18
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Micromodal-PP
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
300
00 05 10 15 20 25 30 35 40 45 50
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Glass-Epoxy
B
AC
D
E
F
01082012 13National Conference on Recent advances in
Composites - Hyderabad
14
0
20
40
60
80
100
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
0 1 2 3 4 5 6 7 8 9
Displacement ()
IFSS 28 MPa
IFSS 70 MPa
(C)(A) (B)
0
40
80
120
160
200
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS 45 MPa
( l )
(F)
(d)
Deb
on
din
g f
orc
e (m
N)
Displacement () Displacement () Displacement ()
Fibre-Matrix adhesion comparison
Hemp-epoxy Lyocell-epoxy
0
5
10
15
20
25
30
35
40
45
Hemp-Epoxy Lyocell-Epoxy Glass-Epoxy
Sh
ea
r s
tre
ng
th (
MP
a)
Double-notched shear test (macro) Microbond test (micro)
Microbond shear strength values are under estimated for lyocell-epoxy due to the low tensile strength of lyocell
No mechanical bonding is existing between lyocell-epoxy due to the high fibrillation resistance of lyocell fibres
0
100
200
300
400
500
600
0 2 4 6 8Elongation ()
Tensile
str
en
gth
(M
Pa)
Lyocell-Epoxy
Tirecord-Epoxy
Hemp-Epoxy
Glass-Epoxy
Tensile properties of unidirectional composite
0
5
10
15
20
25
30
35
40
45
Tirecord Lyocell Lyocell-S Hemp Glass
Ten
sile m
od
ulu
s (
GP
a)
Average modulus
Specific modulus
01082012 16National Conference on Recent advances in
Composites - Hyderabad
0
100
200
300
400
500
600
700
800
900
1000
Lyocell Flax Hemp GlassF
lexu
ral str
en
gth
(M
Pa
)
Average bending strength
Specific bending strength
0
5
10
15
20
25
30
35
40
Lyocell Flax Hemp Glass
Fle
xu
ral m
od
ulu
s (
GP
a)
Average flexural modulus
Specific flexural modulus
Bending properties of unidirectional epoxy composite
01082012 17National Conference on Recent advances in
Composites - Hyderabad
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
1 Annual growing raw material up to two cropsa
2 Low costs05 to 1 eurokg compared to 2 eurokg for glass fibers
3 Low density1500 kgm3 glass 2500 kgm3
4 Fibers act non-abrasive
5 Low energy consumptionone-fifth of fiber glass production
6 Physiological harmlessnessno skin irritation
7 CO2-neutrality when incinerated
8 Residual free thermal utilization
9 Safer crash behavior (high stability and absence of splintering
10 Environmental Regulations (end-of-life vehicle regulation ELV)
Replace Glass fibres with Flax Hemp etc - BIOCOMPOSITES
Money spent to reduce the 1 kilo weight
Space agencies 25000 Euro
Aeronautics 250 - 750 Euro
Automobile 0 - 25 Euro
Cost E54WG2 17102008 Budapest Micromechanics of single Pulp Fibres
7
Single Fibre testing
bullDirect gripping (ASTM D 3822) Standard test
method for tensile properties of single textile fibres
- Viscose rayon Flax Polyester
bull Paper frame set-up (ASTM D 3379-75) Standard
method for tensile strength and youngs modulus of
single technical fibres
- Glass Carbon Aramid
Paper frame set-upDirect gripping
To avoid the slippage problem and for better accuracy in E-modulus measurement ltlt Paper frame set-up gtgt is adopted for single pulp fibre testing
Ball and
socket
method
Courtesy Dr Navi and Dr Sedighi-Gilani from EPFL (CH) Prof Gindl from BOKU (A)
Gauge length 20 mm (Paper frame)
Gauge length 50 mm (Direct gripping)
Single fibre tensile properties
200
300
400
500
600
700
800
8 13 18 23 28 33 38 43
Specific modulus [GPa gcm-3
]
Sp
ec
ific
str
en
gth
[M
Pa
g
cm
-3]
Flax
Lyocell
Rayon tirecord
Glass
Carbon X = 127 Y = 2440
Carbon
Modal
Viscose
01082012 8National Conference on Recent advances in
Composites - Hyderabad
9
Viscose (Rayon) and Lyocell fibres
Kraft or Chemical pulping
uses NaOH and Na2S
here Lignin is completely
removed It accounts for
70 pulp production
Pulping cooking aims to separate cellulose fibers from the wood structure
Mechanical pulping
involves metal disks
which grinds the wood
here lignin is partially
removed
Raw Cellulose (I) -
Unpurified
Regenerated Cellulose (II)
- Purifed
RegenerationPulping
Lenzing AG
Mechanical properties of
Cellulose (I) gtgt Cellulose (II)
01082012National Conference on Recent advances in
Composites - Hyderabad
BIRLA Cellulose
Composite Manufacturing
Epoxy resin 80 degrees 1-2 hours
Fibre volume content - 55
Needle punched nonwoven mats
Adding the thermoset resin
Fibre rovings
01082012 10National Conference on Recent advances in
Composites - Hyderabad
Fibre - Matrix adhesion determinationMicrolevel Microbond test
Interfacial shear strength is measured
Macrolevel-1 Scanning electron mictoscopy
Fibre pull-out is considered
Macrolevel-2 Double notch shear test
Interlaminar shear strength is measured
Epoxy droplet on lyocell fibre SEM fractograph of lyocell-epoxy
Shear test of lyocell-epoxy composite specimen
01082012 11National Conference on Recent advances in
Composites - Hyderabad
Droplet on lyocell fiberDroplet formationPP trousers
Microbond technique
l d ratio for lyocell-PP ~ 20
l d ratio for glass-PP ~ 80
πdl
Fτ
= Interfacial shear strengthF = Maximum load prior to de-bondingd = fibre diameterl = fibre embedded length
τ
5 5 5
82
020 Fibre with
PP drop
5 5 55 5 5
82
020 Fibre with
PP drop
l
Carbide cutter
edges
Detail
d
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Lyocell-MAH-PP - PP
0
40
80
120
160
200
240
0 1 2 3 4 5 6 7
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS - 53 MPa
IFSS - 83 MPa
Influence of fibre modification (MAH) is quantitatively observed
01082012 12National Conference on Recent advances in
Composites - Hyderabad
Debonding in Microbond test
0
4
8
12
16
20
24
28
32
36
0 2 4 6 8 10 12 14 16 18
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Micromodal-PP
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
300
00 05 10 15 20 25 30 35 40 45 50
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Glass-Epoxy
B
AC
D
E
F
01082012 13National Conference on Recent advances in
Composites - Hyderabad
14
0
20
40
60
80
100
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
0 1 2 3 4 5 6 7 8 9
Displacement ()
IFSS 28 MPa
IFSS 70 MPa
(C)(A) (B)
0
40
80
120
160
200
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS 45 MPa
( l )
(F)
(d)
Deb
on
din
g f
orc
e (m
N)
Displacement () Displacement () Displacement ()
Fibre-Matrix adhesion comparison
Hemp-epoxy Lyocell-epoxy
0
5
10
15
20
25
30
35
40
45
Hemp-Epoxy Lyocell-Epoxy Glass-Epoxy
Sh
ea
r s
tre
ng
th (
MP
a)
Double-notched shear test (macro) Microbond test (micro)
Microbond shear strength values are under estimated for lyocell-epoxy due to the low tensile strength of lyocell
No mechanical bonding is existing between lyocell-epoxy due to the high fibrillation resistance of lyocell fibres
0
100
200
300
400
500
600
0 2 4 6 8Elongation ()
Tensile
str
en
gth
(M
Pa)
Lyocell-Epoxy
Tirecord-Epoxy
Hemp-Epoxy
Glass-Epoxy
Tensile properties of unidirectional composite
0
5
10
15
20
25
30
35
40
45
Tirecord Lyocell Lyocell-S Hemp Glass
Ten
sile m
od
ulu
s (
GP
a)
Average modulus
Specific modulus
01082012 16National Conference on Recent advances in
Composites - Hyderabad
0
100
200
300
400
500
600
700
800
900
1000
Lyocell Flax Hemp GlassF
lexu
ral str
en
gth
(M
Pa
)
Average bending strength
Specific bending strength
0
5
10
15
20
25
30
35
40
Lyocell Flax Hemp Glass
Fle
xu
ral m
od
ulu
s (
GP
a)
Average flexural modulus
Specific flexural modulus
Bending properties of unidirectional epoxy composite
01082012 17National Conference on Recent advances in
Composites - Hyderabad
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
Cost E54WG2 17102008 Budapest Micromechanics of single Pulp Fibres
7
Single Fibre testing
bullDirect gripping (ASTM D 3822) Standard test
method for tensile properties of single textile fibres
- Viscose rayon Flax Polyester
bull Paper frame set-up (ASTM D 3379-75) Standard
method for tensile strength and youngs modulus of
single technical fibres
- Glass Carbon Aramid
Paper frame set-upDirect gripping
To avoid the slippage problem and for better accuracy in E-modulus measurement ltlt Paper frame set-up gtgt is adopted for single pulp fibre testing
Ball and
socket
method
Courtesy Dr Navi and Dr Sedighi-Gilani from EPFL (CH) Prof Gindl from BOKU (A)
Gauge length 20 mm (Paper frame)
Gauge length 50 mm (Direct gripping)
Single fibre tensile properties
200
300
400
500
600
700
800
8 13 18 23 28 33 38 43
Specific modulus [GPa gcm-3
]
Sp
ec
ific
str
en
gth
[M
Pa
g
cm
-3]
Flax
Lyocell
Rayon tirecord
Glass
Carbon X = 127 Y = 2440
Carbon
Modal
Viscose
01082012 8National Conference on Recent advances in
Composites - Hyderabad
9
Viscose (Rayon) and Lyocell fibres
Kraft or Chemical pulping
uses NaOH and Na2S
here Lignin is completely
removed It accounts for
70 pulp production
Pulping cooking aims to separate cellulose fibers from the wood structure
Mechanical pulping
involves metal disks
which grinds the wood
here lignin is partially
removed
Raw Cellulose (I) -
Unpurified
Regenerated Cellulose (II)
- Purifed
RegenerationPulping
Lenzing AG
Mechanical properties of
Cellulose (I) gtgt Cellulose (II)
01082012National Conference on Recent advances in
Composites - Hyderabad
BIRLA Cellulose
Composite Manufacturing
Epoxy resin 80 degrees 1-2 hours
Fibre volume content - 55
Needle punched nonwoven mats
Adding the thermoset resin
Fibre rovings
01082012 10National Conference on Recent advances in
Composites - Hyderabad
Fibre - Matrix adhesion determinationMicrolevel Microbond test
Interfacial shear strength is measured
Macrolevel-1 Scanning electron mictoscopy
Fibre pull-out is considered
Macrolevel-2 Double notch shear test
Interlaminar shear strength is measured
Epoxy droplet on lyocell fibre SEM fractograph of lyocell-epoxy
Shear test of lyocell-epoxy composite specimen
01082012 11National Conference on Recent advances in
Composites - Hyderabad
Droplet on lyocell fiberDroplet formationPP trousers
Microbond technique
l d ratio for lyocell-PP ~ 20
l d ratio for glass-PP ~ 80
πdl
Fτ
= Interfacial shear strengthF = Maximum load prior to de-bondingd = fibre diameterl = fibre embedded length
τ
5 5 5
82
020 Fibre with
PP drop
5 5 55 5 5
82
020 Fibre with
PP drop
l
Carbide cutter
edges
Detail
d
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Lyocell-MAH-PP - PP
0
40
80
120
160
200
240
0 1 2 3 4 5 6 7
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS - 53 MPa
IFSS - 83 MPa
Influence of fibre modification (MAH) is quantitatively observed
01082012 12National Conference on Recent advances in
Composites - Hyderabad
Debonding in Microbond test
0
4
8
12
16
20
24
28
32
36
0 2 4 6 8 10 12 14 16 18
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Micromodal-PP
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
300
00 05 10 15 20 25 30 35 40 45 50
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Glass-Epoxy
B
AC
D
E
F
01082012 13National Conference on Recent advances in
Composites - Hyderabad
14
0
20
40
60
80
100
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
0 1 2 3 4 5 6 7 8 9
Displacement ()
IFSS 28 MPa
IFSS 70 MPa
(C)(A) (B)
0
40
80
120
160
200
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS 45 MPa
( l )
(F)
(d)
Deb
on
din
g f
orc
e (m
N)
Displacement () Displacement () Displacement ()
Fibre-Matrix adhesion comparison
Hemp-epoxy Lyocell-epoxy
0
5
10
15
20
25
30
35
40
45
Hemp-Epoxy Lyocell-Epoxy Glass-Epoxy
Sh
ea
r s
tre
ng
th (
MP
a)
Double-notched shear test (macro) Microbond test (micro)
Microbond shear strength values are under estimated for lyocell-epoxy due to the low tensile strength of lyocell
No mechanical bonding is existing between lyocell-epoxy due to the high fibrillation resistance of lyocell fibres
0
100
200
300
400
500
600
0 2 4 6 8Elongation ()
Tensile
str
en
gth
(M
Pa)
Lyocell-Epoxy
Tirecord-Epoxy
Hemp-Epoxy
Glass-Epoxy
Tensile properties of unidirectional composite
0
5
10
15
20
25
30
35
40
45
Tirecord Lyocell Lyocell-S Hemp Glass
Ten
sile m
od
ulu
s (
GP
a)
Average modulus
Specific modulus
01082012 16National Conference on Recent advances in
Composites - Hyderabad
0
100
200
300
400
500
600
700
800
900
1000
Lyocell Flax Hemp GlassF
lexu
ral str
en
gth
(M
Pa
)
Average bending strength
Specific bending strength
0
5
10
15
20
25
30
35
40
Lyocell Flax Hemp Glass
Fle
xu
ral m
od
ulu
s (
GP
a)
Average flexural modulus
Specific flexural modulus
Bending properties of unidirectional epoxy composite
01082012 17National Conference on Recent advances in
Composites - Hyderabad
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
Single fibre tensile properties
200
300
400
500
600
700
800
8 13 18 23 28 33 38 43
Specific modulus [GPa gcm-3
]
Sp
ec
ific
str
en
gth
[M
Pa
g
cm
-3]
Flax
Lyocell
Rayon tirecord
Glass
Carbon X = 127 Y = 2440
Carbon
Modal
Viscose
01082012 8National Conference on Recent advances in
Composites - Hyderabad
9
Viscose (Rayon) and Lyocell fibres
Kraft or Chemical pulping
uses NaOH and Na2S
here Lignin is completely
removed It accounts for
70 pulp production
Pulping cooking aims to separate cellulose fibers from the wood structure
Mechanical pulping
involves metal disks
which grinds the wood
here lignin is partially
removed
Raw Cellulose (I) -
Unpurified
Regenerated Cellulose (II)
- Purifed
RegenerationPulping
Lenzing AG
Mechanical properties of
Cellulose (I) gtgt Cellulose (II)
01082012National Conference on Recent advances in
Composites - Hyderabad
BIRLA Cellulose
Composite Manufacturing
Epoxy resin 80 degrees 1-2 hours
Fibre volume content - 55
Needle punched nonwoven mats
Adding the thermoset resin
Fibre rovings
01082012 10National Conference on Recent advances in
Composites - Hyderabad
Fibre - Matrix adhesion determinationMicrolevel Microbond test
Interfacial shear strength is measured
Macrolevel-1 Scanning electron mictoscopy
Fibre pull-out is considered
Macrolevel-2 Double notch shear test
Interlaminar shear strength is measured
Epoxy droplet on lyocell fibre SEM fractograph of lyocell-epoxy
Shear test of lyocell-epoxy composite specimen
01082012 11National Conference on Recent advances in
Composites - Hyderabad
Droplet on lyocell fiberDroplet formationPP trousers
Microbond technique
l d ratio for lyocell-PP ~ 20
l d ratio for glass-PP ~ 80
πdl
Fτ
= Interfacial shear strengthF = Maximum load prior to de-bondingd = fibre diameterl = fibre embedded length
τ
5 5 5
82
020 Fibre with
PP drop
5 5 55 5 5
82
020 Fibre with
PP drop
l
Carbide cutter
edges
Detail
d
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Lyocell-MAH-PP - PP
0
40
80
120
160
200
240
0 1 2 3 4 5 6 7
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS - 53 MPa
IFSS - 83 MPa
Influence of fibre modification (MAH) is quantitatively observed
01082012 12National Conference on Recent advances in
Composites - Hyderabad
Debonding in Microbond test
0
4
8
12
16
20
24
28
32
36
0 2 4 6 8 10 12 14 16 18
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Micromodal-PP
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
300
00 05 10 15 20 25 30 35 40 45 50
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Glass-Epoxy
B
AC
D
E
F
01082012 13National Conference on Recent advances in
Composites - Hyderabad
14
0
20
40
60
80
100
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
0 1 2 3 4 5 6 7 8 9
Displacement ()
IFSS 28 MPa
IFSS 70 MPa
(C)(A) (B)
0
40
80
120
160
200
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS 45 MPa
( l )
(F)
(d)
Deb
on
din
g f
orc
e (m
N)
Displacement () Displacement () Displacement ()
Fibre-Matrix adhesion comparison
Hemp-epoxy Lyocell-epoxy
0
5
10
15
20
25
30
35
40
45
Hemp-Epoxy Lyocell-Epoxy Glass-Epoxy
Sh
ea
r s
tre
ng
th (
MP
a)
Double-notched shear test (macro) Microbond test (micro)
Microbond shear strength values are under estimated for lyocell-epoxy due to the low tensile strength of lyocell
No mechanical bonding is existing between lyocell-epoxy due to the high fibrillation resistance of lyocell fibres
0
100
200
300
400
500
600
0 2 4 6 8Elongation ()
Tensile
str
en
gth
(M
Pa)
Lyocell-Epoxy
Tirecord-Epoxy
Hemp-Epoxy
Glass-Epoxy
Tensile properties of unidirectional composite
0
5
10
15
20
25
30
35
40
45
Tirecord Lyocell Lyocell-S Hemp Glass
Ten
sile m
od
ulu
s (
GP
a)
Average modulus
Specific modulus
01082012 16National Conference on Recent advances in
Composites - Hyderabad
0
100
200
300
400
500
600
700
800
900
1000
Lyocell Flax Hemp GlassF
lexu
ral str
en
gth
(M
Pa
)
Average bending strength
Specific bending strength
0
5
10
15
20
25
30
35
40
Lyocell Flax Hemp Glass
Fle
xu
ral m
od
ulu
s (
GP
a)
Average flexural modulus
Specific flexural modulus
Bending properties of unidirectional epoxy composite
01082012 17National Conference on Recent advances in
Composites - Hyderabad
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
9
Viscose (Rayon) and Lyocell fibres
Kraft or Chemical pulping
uses NaOH and Na2S
here Lignin is completely
removed It accounts for
70 pulp production
Pulping cooking aims to separate cellulose fibers from the wood structure
Mechanical pulping
involves metal disks
which grinds the wood
here lignin is partially
removed
Raw Cellulose (I) -
Unpurified
Regenerated Cellulose (II)
- Purifed
RegenerationPulping
Lenzing AG
Mechanical properties of
Cellulose (I) gtgt Cellulose (II)
01082012National Conference on Recent advances in
Composites - Hyderabad
BIRLA Cellulose
Composite Manufacturing
Epoxy resin 80 degrees 1-2 hours
Fibre volume content - 55
Needle punched nonwoven mats
Adding the thermoset resin
Fibre rovings
01082012 10National Conference on Recent advances in
Composites - Hyderabad
Fibre - Matrix adhesion determinationMicrolevel Microbond test
Interfacial shear strength is measured
Macrolevel-1 Scanning electron mictoscopy
Fibre pull-out is considered
Macrolevel-2 Double notch shear test
Interlaminar shear strength is measured
Epoxy droplet on lyocell fibre SEM fractograph of lyocell-epoxy
Shear test of lyocell-epoxy composite specimen
01082012 11National Conference on Recent advances in
Composites - Hyderabad
Droplet on lyocell fiberDroplet formationPP trousers
Microbond technique
l d ratio for lyocell-PP ~ 20
l d ratio for glass-PP ~ 80
πdl
Fτ
= Interfacial shear strengthF = Maximum load prior to de-bondingd = fibre diameterl = fibre embedded length
τ
5 5 5
82
020 Fibre with
PP drop
5 5 55 5 5
82
020 Fibre with
PP drop
l
Carbide cutter
edges
Detail
d
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Lyocell-MAH-PP - PP
0
40
80
120
160
200
240
0 1 2 3 4 5 6 7
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS - 53 MPa
IFSS - 83 MPa
Influence of fibre modification (MAH) is quantitatively observed
01082012 12National Conference on Recent advances in
Composites - Hyderabad
Debonding in Microbond test
0
4
8
12
16
20
24
28
32
36
0 2 4 6 8 10 12 14 16 18
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Micromodal-PP
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
300
00 05 10 15 20 25 30 35 40 45 50
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Glass-Epoxy
B
AC
D
E
F
01082012 13National Conference on Recent advances in
Composites - Hyderabad
14
0
20
40
60
80
100
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
0 1 2 3 4 5 6 7 8 9
Displacement ()
IFSS 28 MPa
IFSS 70 MPa
(C)(A) (B)
0
40
80
120
160
200
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS 45 MPa
( l )
(F)
(d)
Deb
on
din
g f
orc
e (m
N)
Displacement () Displacement () Displacement ()
Fibre-Matrix adhesion comparison
Hemp-epoxy Lyocell-epoxy
0
5
10
15
20
25
30
35
40
45
Hemp-Epoxy Lyocell-Epoxy Glass-Epoxy
Sh
ea
r s
tre
ng
th (
MP
a)
Double-notched shear test (macro) Microbond test (micro)
Microbond shear strength values are under estimated for lyocell-epoxy due to the low tensile strength of lyocell
No mechanical bonding is existing between lyocell-epoxy due to the high fibrillation resistance of lyocell fibres
0
100
200
300
400
500
600
0 2 4 6 8Elongation ()
Tensile
str
en
gth
(M
Pa)
Lyocell-Epoxy
Tirecord-Epoxy
Hemp-Epoxy
Glass-Epoxy
Tensile properties of unidirectional composite
0
5
10
15
20
25
30
35
40
45
Tirecord Lyocell Lyocell-S Hemp Glass
Ten
sile m
od
ulu
s (
GP
a)
Average modulus
Specific modulus
01082012 16National Conference on Recent advances in
Composites - Hyderabad
0
100
200
300
400
500
600
700
800
900
1000
Lyocell Flax Hemp GlassF
lexu
ral str
en
gth
(M
Pa
)
Average bending strength
Specific bending strength
0
5
10
15
20
25
30
35
40
Lyocell Flax Hemp Glass
Fle
xu
ral m
od
ulu
s (
GP
a)
Average flexural modulus
Specific flexural modulus
Bending properties of unidirectional epoxy composite
01082012 17National Conference on Recent advances in
Composites - Hyderabad
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
Composite Manufacturing
Epoxy resin 80 degrees 1-2 hours
Fibre volume content - 55
Needle punched nonwoven mats
Adding the thermoset resin
Fibre rovings
01082012 10National Conference on Recent advances in
Composites - Hyderabad
Fibre - Matrix adhesion determinationMicrolevel Microbond test
Interfacial shear strength is measured
Macrolevel-1 Scanning electron mictoscopy
Fibre pull-out is considered
Macrolevel-2 Double notch shear test
Interlaminar shear strength is measured
Epoxy droplet on lyocell fibre SEM fractograph of lyocell-epoxy
Shear test of lyocell-epoxy composite specimen
01082012 11National Conference on Recent advances in
Composites - Hyderabad
Droplet on lyocell fiberDroplet formationPP trousers
Microbond technique
l d ratio for lyocell-PP ~ 20
l d ratio for glass-PP ~ 80
πdl
Fτ
= Interfacial shear strengthF = Maximum load prior to de-bondingd = fibre diameterl = fibre embedded length
τ
5 5 5
82
020 Fibre with
PP drop
5 5 55 5 5
82
020 Fibre with
PP drop
l
Carbide cutter
edges
Detail
d
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Lyocell-MAH-PP - PP
0
40
80
120
160
200
240
0 1 2 3 4 5 6 7
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS - 53 MPa
IFSS - 83 MPa
Influence of fibre modification (MAH) is quantitatively observed
01082012 12National Conference on Recent advances in
Composites - Hyderabad
Debonding in Microbond test
0
4
8
12
16
20
24
28
32
36
0 2 4 6 8 10 12 14 16 18
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Micromodal-PP
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
300
00 05 10 15 20 25 30 35 40 45 50
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Glass-Epoxy
B
AC
D
E
F
01082012 13National Conference on Recent advances in
Composites - Hyderabad
14
0
20
40
60
80
100
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
0 1 2 3 4 5 6 7 8 9
Displacement ()
IFSS 28 MPa
IFSS 70 MPa
(C)(A) (B)
0
40
80
120
160
200
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS 45 MPa
( l )
(F)
(d)
Deb
on
din
g f
orc
e (m
N)
Displacement () Displacement () Displacement ()
Fibre-Matrix adhesion comparison
Hemp-epoxy Lyocell-epoxy
0
5
10
15
20
25
30
35
40
45
Hemp-Epoxy Lyocell-Epoxy Glass-Epoxy
Sh
ea
r s
tre
ng
th (
MP
a)
Double-notched shear test (macro) Microbond test (micro)
Microbond shear strength values are under estimated for lyocell-epoxy due to the low tensile strength of lyocell
No mechanical bonding is existing between lyocell-epoxy due to the high fibrillation resistance of lyocell fibres
0
100
200
300
400
500
600
0 2 4 6 8Elongation ()
Tensile
str
en
gth
(M
Pa)
Lyocell-Epoxy
Tirecord-Epoxy
Hemp-Epoxy
Glass-Epoxy
Tensile properties of unidirectional composite
0
5
10
15
20
25
30
35
40
45
Tirecord Lyocell Lyocell-S Hemp Glass
Ten
sile m
od
ulu
s (
GP
a)
Average modulus
Specific modulus
01082012 16National Conference on Recent advances in
Composites - Hyderabad
0
100
200
300
400
500
600
700
800
900
1000
Lyocell Flax Hemp GlassF
lexu
ral str
en
gth
(M
Pa
)
Average bending strength
Specific bending strength
0
5
10
15
20
25
30
35
40
Lyocell Flax Hemp Glass
Fle
xu
ral m
od
ulu
s (
GP
a)
Average flexural modulus
Specific flexural modulus
Bending properties of unidirectional epoxy composite
01082012 17National Conference on Recent advances in
Composites - Hyderabad
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
Fibre - Matrix adhesion determinationMicrolevel Microbond test
Interfacial shear strength is measured
Macrolevel-1 Scanning electron mictoscopy
Fibre pull-out is considered
Macrolevel-2 Double notch shear test
Interlaminar shear strength is measured
Epoxy droplet on lyocell fibre SEM fractograph of lyocell-epoxy
Shear test of lyocell-epoxy composite specimen
01082012 11National Conference on Recent advances in
Composites - Hyderabad
Droplet on lyocell fiberDroplet formationPP trousers
Microbond technique
l d ratio for lyocell-PP ~ 20
l d ratio for glass-PP ~ 80
πdl
Fτ
= Interfacial shear strengthF = Maximum load prior to de-bondingd = fibre diameterl = fibre embedded length
τ
5 5 5
82
020 Fibre with
PP drop
5 5 55 5 5
82
020 Fibre with
PP drop
l
Carbide cutter
edges
Detail
d
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Lyocell-MAH-PP - PP
0
40
80
120
160
200
240
0 1 2 3 4 5 6 7
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS - 53 MPa
IFSS - 83 MPa
Influence of fibre modification (MAH) is quantitatively observed
01082012 12National Conference on Recent advances in
Composites - Hyderabad
Debonding in Microbond test
0
4
8
12
16
20
24
28
32
36
0 2 4 6 8 10 12 14 16 18
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Micromodal-PP
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
300
00 05 10 15 20 25 30 35 40 45 50
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Glass-Epoxy
B
AC
D
E
F
01082012 13National Conference on Recent advances in
Composites - Hyderabad
14
0
20
40
60
80
100
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
0 1 2 3 4 5 6 7 8 9
Displacement ()
IFSS 28 MPa
IFSS 70 MPa
(C)(A) (B)
0
40
80
120
160
200
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS 45 MPa
( l )
(F)
(d)
Deb
on
din
g f
orc
e (m
N)
Displacement () Displacement () Displacement ()
Fibre-Matrix adhesion comparison
Hemp-epoxy Lyocell-epoxy
0
5
10
15
20
25
30
35
40
45
Hemp-Epoxy Lyocell-Epoxy Glass-Epoxy
Sh
ea
r s
tre
ng
th (
MP
a)
Double-notched shear test (macro) Microbond test (micro)
Microbond shear strength values are under estimated for lyocell-epoxy due to the low tensile strength of lyocell
No mechanical bonding is existing between lyocell-epoxy due to the high fibrillation resistance of lyocell fibres
0
100
200
300
400
500
600
0 2 4 6 8Elongation ()
Tensile
str
en
gth
(M
Pa)
Lyocell-Epoxy
Tirecord-Epoxy
Hemp-Epoxy
Glass-Epoxy
Tensile properties of unidirectional composite
0
5
10
15
20
25
30
35
40
45
Tirecord Lyocell Lyocell-S Hemp Glass
Ten
sile m
od
ulu
s (
GP
a)
Average modulus
Specific modulus
01082012 16National Conference on Recent advances in
Composites - Hyderabad
0
100
200
300
400
500
600
700
800
900
1000
Lyocell Flax Hemp GlassF
lexu
ral str
en
gth
(M
Pa
)
Average bending strength
Specific bending strength
0
5
10
15
20
25
30
35
40
Lyocell Flax Hemp Glass
Fle
xu
ral m
od
ulu
s (
GP
a)
Average flexural modulus
Specific flexural modulus
Bending properties of unidirectional epoxy composite
01082012 17National Conference on Recent advances in
Composites - Hyderabad
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
Microbond technique
l d ratio for lyocell-PP ~ 20
l d ratio for glass-PP ~ 80
πdl
Fτ
= Interfacial shear strengthF = Maximum load prior to de-bondingd = fibre diameterl = fibre embedded length
τ
5 5 5
82
020 Fibre with
PP drop
5 5 55 5 5
82
020 Fibre with
PP drop
l
Carbide cutter
edges
Detail
d
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Lyocell-MAH-PP - PP
0
40
80
120
160
200
240
0 1 2 3 4 5 6 7
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS - 53 MPa
IFSS - 83 MPa
Influence of fibre modification (MAH) is quantitatively observed
01082012 12National Conference on Recent advances in
Composites - Hyderabad
Debonding in Microbond test
0
4
8
12
16
20
24
28
32
36
0 2 4 6 8 10 12 14 16 18
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Micromodal-PP
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
300
00 05 10 15 20 25 30 35 40 45 50
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Glass-Epoxy
B
AC
D
E
F
01082012 13National Conference on Recent advances in
Composites - Hyderabad
14
0
20
40
60
80
100
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
0 1 2 3 4 5 6 7 8 9
Displacement ()
IFSS 28 MPa
IFSS 70 MPa
(C)(A) (B)
0
40
80
120
160
200
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS 45 MPa
( l )
(F)
(d)
Deb
on
din
g f
orc
e (m
N)
Displacement () Displacement () Displacement ()
Fibre-Matrix adhesion comparison
Hemp-epoxy Lyocell-epoxy
0
5
10
15
20
25
30
35
40
45
Hemp-Epoxy Lyocell-Epoxy Glass-Epoxy
Sh
ea
r s
tre
ng
th (
MP
a)
Double-notched shear test (macro) Microbond test (micro)
Microbond shear strength values are under estimated for lyocell-epoxy due to the low tensile strength of lyocell
No mechanical bonding is existing between lyocell-epoxy due to the high fibrillation resistance of lyocell fibres
0
100
200
300
400
500
600
0 2 4 6 8Elongation ()
Tensile
str
en
gth
(M
Pa)
Lyocell-Epoxy
Tirecord-Epoxy
Hemp-Epoxy
Glass-Epoxy
Tensile properties of unidirectional composite
0
5
10
15
20
25
30
35
40
45
Tirecord Lyocell Lyocell-S Hemp Glass
Ten
sile m
od
ulu
s (
GP
a)
Average modulus
Specific modulus
01082012 16National Conference on Recent advances in
Composites - Hyderabad
0
100
200
300
400
500
600
700
800
900
1000
Lyocell Flax Hemp GlassF
lexu
ral str
en
gth
(M
Pa
)
Average bending strength
Specific bending strength
0
5
10
15
20
25
30
35
40
Lyocell Flax Hemp Glass
Fle
xu
ral m
od
ulu
s (
GP
a)
Average flexural modulus
Specific flexural modulus
Bending properties of unidirectional epoxy composite
01082012 17National Conference on Recent advances in
Composites - Hyderabad
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
Debonding in Microbond test
0
4
8
12
16
20
24
28
32
36
0 2 4 6 8 10 12 14 16 18
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Micromodal-PP
Lyocell-PP
0
20
40
60
80
100
120
140
0 2 4 6 8 10
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
300
00 05 10 15 20 25 30 35 40 45 50
Displacement ()
Deb
on
din
g f
orc
e (m
N)
Glass-Epoxy
B
AC
D
E
F
01082012 13National Conference on Recent advances in
Composites - Hyderabad
14
0
20
40
60
80
100
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
0 1 2 3 4 5 6 7 8 9
Displacement ()
IFSS 28 MPa
IFSS 70 MPa
(C)(A) (B)
0
40
80
120
160
200
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS 45 MPa
( l )
(F)
(d)
Deb
on
din
g f
orc
e (m
N)
Displacement () Displacement () Displacement ()
Fibre-Matrix adhesion comparison
Hemp-epoxy Lyocell-epoxy
0
5
10
15
20
25
30
35
40
45
Hemp-Epoxy Lyocell-Epoxy Glass-Epoxy
Sh
ea
r s
tre
ng
th (
MP
a)
Double-notched shear test (macro) Microbond test (micro)
Microbond shear strength values are under estimated for lyocell-epoxy due to the low tensile strength of lyocell
No mechanical bonding is existing between lyocell-epoxy due to the high fibrillation resistance of lyocell fibres
0
100
200
300
400
500
600
0 2 4 6 8Elongation ()
Tensile
str
en
gth
(M
Pa)
Lyocell-Epoxy
Tirecord-Epoxy
Hemp-Epoxy
Glass-Epoxy
Tensile properties of unidirectional composite
0
5
10
15
20
25
30
35
40
45
Tirecord Lyocell Lyocell-S Hemp Glass
Ten
sile m
od
ulu
s (
GP
a)
Average modulus
Specific modulus
01082012 16National Conference on Recent advances in
Composites - Hyderabad
0
100
200
300
400
500
600
700
800
900
1000
Lyocell Flax Hemp GlassF
lexu
ral str
en
gth
(M
Pa
)
Average bending strength
Specific bending strength
0
5
10
15
20
25
30
35
40
Lyocell Flax Hemp Glass
Fle
xu
ral m
od
ulu
s (
GP
a)
Average flexural modulus
Specific flexural modulus
Bending properties of unidirectional epoxy composite
01082012 17National Conference on Recent advances in
Composites - Hyderabad
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
14
0
20
40
60
80
100
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
0
50
100
150
200
250
0 1 2 3 4 5 6 7 8 9
Displacement ()
IFSS 28 MPa
IFSS 70 MPa
(C)(A) (B)
0
40
80
120
160
200
0 1 2 3 4 5 6 7 8 9
Displacement ()
Deb
on
din
g f
orc
e (m
N)
IFSS 45 MPa
( l )
(F)
(d)
Deb
on
din
g f
orc
e (m
N)
Displacement () Displacement () Displacement ()
Fibre-Matrix adhesion comparison
Hemp-epoxy Lyocell-epoxy
0
5
10
15
20
25
30
35
40
45
Hemp-Epoxy Lyocell-Epoxy Glass-Epoxy
Sh
ea
r s
tre
ng
th (
MP
a)
Double-notched shear test (macro) Microbond test (micro)
Microbond shear strength values are under estimated for lyocell-epoxy due to the low tensile strength of lyocell
No mechanical bonding is existing between lyocell-epoxy due to the high fibrillation resistance of lyocell fibres
0
100
200
300
400
500
600
0 2 4 6 8Elongation ()
Tensile
str
en
gth
(M
Pa)
Lyocell-Epoxy
Tirecord-Epoxy
Hemp-Epoxy
Glass-Epoxy
Tensile properties of unidirectional composite
0
5
10
15
20
25
30
35
40
45
Tirecord Lyocell Lyocell-S Hemp Glass
Ten
sile m
od
ulu
s (
GP
a)
Average modulus
Specific modulus
01082012 16National Conference on Recent advances in
Composites - Hyderabad
0
100
200
300
400
500
600
700
800
900
1000
Lyocell Flax Hemp GlassF
lexu
ral str
en
gth
(M
Pa
)
Average bending strength
Specific bending strength
0
5
10
15
20
25
30
35
40
Lyocell Flax Hemp Glass
Fle
xu
ral m
od
ulu
s (
GP
a)
Average flexural modulus
Specific flexural modulus
Bending properties of unidirectional epoxy composite
01082012 17National Conference on Recent advances in
Composites - Hyderabad
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
Fibre-Matrix adhesion comparison
Hemp-epoxy Lyocell-epoxy
0
5
10
15
20
25
30
35
40
45
Hemp-Epoxy Lyocell-Epoxy Glass-Epoxy
Sh
ea
r s
tre
ng
th (
MP
a)
Double-notched shear test (macro) Microbond test (micro)
Microbond shear strength values are under estimated for lyocell-epoxy due to the low tensile strength of lyocell
No mechanical bonding is existing between lyocell-epoxy due to the high fibrillation resistance of lyocell fibres
0
100
200
300
400
500
600
0 2 4 6 8Elongation ()
Tensile
str
en
gth
(M
Pa)
Lyocell-Epoxy
Tirecord-Epoxy
Hemp-Epoxy
Glass-Epoxy
Tensile properties of unidirectional composite
0
5
10
15
20
25
30
35
40
45
Tirecord Lyocell Lyocell-S Hemp Glass
Ten
sile m
od
ulu
s (
GP
a)
Average modulus
Specific modulus
01082012 16National Conference on Recent advances in
Composites - Hyderabad
0
100
200
300
400
500
600
700
800
900
1000
Lyocell Flax Hemp GlassF
lexu
ral str
en
gth
(M
Pa
)
Average bending strength
Specific bending strength
0
5
10
15
20
25
30
35
40
Lyocell Flax Hemp Glass
Fle
xu
ral m
od
ulu
s (
GP
a)
Average flexural modulus
Specific flexural modulus
Bending properties of unidirectional epoxy composite
01082012 17National Conference on Recent advances in
Composites - Hyderabad
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
0
100
200
300
400
500
600
0 2 4 6 8Elongation ()
Tensile
str
en
gth
(M
Pa)
Lyocell-Epoxy
Tirecord-Epoxy
Hemp-Epoxy
Glass-Epoxy
Tensile properties of unidirectional composite
0
5
10
15
20
25
30
35
40
45
Tirecord Lyocell Lyocell-S Hemp Glass
Ten
sile m
od
ulu
s (
GP
a)
Average modulus
Specific modulus
01082012 16National Conference on Recent advances in
Composites - Hyderabad
0
100
200
300
400
500
600
700
800
900
1000
Lyocell Flax Hemp GlassF
lexu
ral str
en
gth
(M
Pa
)
Average bending strength
Specific bending strength
0
5
10
15
20
25
30
35
40
Lyocell Flax Hemp Glass
Fle
xu
ral m
od
ulu
s (
GP
a)
Average flexural modulus
Specific flexural modulus
Bending properties of unidirectional epoxy composite
01082012 17National Conference on Recent advances in
Composites - Hyderabad
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
0
100
200
300
400
500
600
700
800
900
1000
Lyocell Flax Hemp GlassF
lexu
ral str
en
gth
(M
Pa
)
Average bending strength
Specific bending strength
0
5
10
15
20
25
30
35
40
Lyocell Flax Hemp Glass
Fle
xu
ral m
od
ulu
s (
GP
a)
Average flexural modulus
Specific flexural modulus
Bending properties of unidirectional epoxy composite
01082012 17National Conference on Recent advances in
Composites - Hyderabad
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
Critical fibre lengths derived from microbond test
02 0304
05 0506
09
06
1112
32
00
05
10
15
20
25
30
35
Epoxy
-Ram
ie
Epoxy
-Lyo
cell
(MA
H)
Epoxy
-Lyo
cell
Epoxy
-Gla
ss
LDPE-L
yoce
ll
LDPE-F
lax
LDPE-G
lass
PP-Lyo
cell
(MA
H)
PP-Ram
ie
PP-Lyo
cell
PP-Gla
ss
Cri
tica
l fi
ber
len
gth
(m
m)
Increase in interfacial shear strength results lower critical fibre lengths
01082012 18National Conference on Recent advances in
Composites - Hyderabad
Important parameter for injection moulding and extrusion techniques
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
01082012National Conference on Recent advances in
Composites - Hyderabad19
HempEP LyocellEP GlassEP000
002
004
006
008
010
012
Lo
ga
rith
mic
de
cre
men
t
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
20
300 nm
Testing nanofibril 30-40 nm diameter and 1 microm length still remains a challenge
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
Conferences and publications1 Presented a poster at ldquoZellcheming 2006rdquo Wiesbaden Germany
2 Presented poster at 2nd ldquoWiener Biomaterial sympoisumrdquo 2006 TU Vienna Austria
3 Presented a poster at ldquo9th International conference on Wood and Natural fibre reinforced compositerdquo
2007 Madison USA
4 Given a talk at ldquoEuropean Conference on Composite Materialsrdquo (ECCM 12) 2006 Biarritz France
1 Single fibre characterisation of Viscose Lyocell Flax and Glass fibres Proceedings ECCM-12 Biarritz
France Sept 2006
2 Tensile Testing of Single Regenerated Cellulose fibres Macromolecular symposia 200624483-88
3 Mechanical Properties of Regenerated Cellulose fibres for Composites Macromolecular symposia
2006244119-125
4 Anisotropy of the modulus of elasticity in regenerated cellulose fibres related to molecular orientation
Polymer 200849792-799
5 Differences in the molecular orientation and mechanical properties of uncrimped and crimped regenerated
cellulose fibres Cellulose
6 Determining the interfacial shear strength between man-made cellulose fibres and polymer matrices by
means of the microbond technique Journal of Composite Materials
7 Evalution of experimental parameter in microbond technique with regard to cellulose fibres Journal of
Reinforced Plastics and Composites
01082012 21National Conference on Recent advances in
Composites - Hyderabad
22
THANK YOU VERY MUCH
22
THANK YOU VERY MUCH