Nano Finishing Its nothing but Art of Nanotechnology in Textile finishing & innovation The Design, creation and application of structures, devices and systems by controlling shape and size at the nanometer scale Textile Applications of Nano Technology FUNCTIONAL water repellent PROTECTION UV absorption DURABILITY color fastness DURABILITY abrasion SAFETY fire retardancy FUNCTIONAL HYGIENE Anti-microbial FUNCTIONAL PROTECTION Controlled release of additives Nano Treated Textile FUNCTIONAL PROTECTION self-cleaning
Transcript
Nano Finishing
Its nothing but Art of Nanotechnology in Textile finishing & innovation The Design, creation and application of structures, devices and systems
by controlling shape and size at the nanometer scale Textile Applications of Nano Technology
FUNCTIONALwater repellent
PROTECTIONUV absorption
DURABILITYcolor fastness
DURABILITYabrasion
SAFETYfire retardancy
FUNCTIONAL HYGIENEAnti-microbial
FUNCTIONAL PROTECTIONControlled release
of additives
Nano Treated Textile
FUNCTIONAL PROTECTIONself-cleaning
Self Cleaning Effect
The self cleaning property was investigated from lotus plant leaves rough surface The lotus effect depends on mainly super hydrophobicity ,very high water contact angle and a very
low roll off angle super-hydrophobic forms a sheet across the surface and easily dislodges and removes dirt as it flows
and prevents a surface from fogging because water spreads instead of forming the innumerable tiny droplets that constitute a fog
Once water droplets fall onto them, water droplets bead up and, if the surface slopes slightly, will roll off
Plasma Finishing•Irving Langmuir first used the term plasma in 1926 to describe the inner region of an electrical discharge •Plasma treatment has an explosive increase in interest and use in industrial Applications as for example in medical, biomedical, automobile, electronics, semiconductor and textile industry• Plasma, as a very reactive material, can be used to modify the surface of a certain substrate (typically known as plasma activation or plasma modification), depositing chemical materials (plasma polymerisation or plasma grafting) to impart some desired properties, removing substances (plasma cleaning or plasma etching), which were previously deposited on the substrate
Plasma treatment has been well known to increase the hydrophilicity, wet ability, wicking characteristics of the substrate.
These characteristics can be induced on the substrate by introducing the polar groups (i.e. –OH–, –OOH–, –COOH– etc).
The increases of the hydrophilic character of hydrophobic fibers such as PET, PA, PP, plays fundamental role in achieving various positive effects on wet processing and other technical effects
SEM Images
Treatment Of Cotton With Different Kinds Of Plasma Gases
The specific surface area of cotton after oxygen plasma treatment is increased. On the other hand, the treatment with hexamethyldisiloxane (HMDSO) plasma leads to a smooth surface with increased contact angle of water up to a maximum of 130°. Thus, a strong effect of Hydrophobisation is achieved. Similarly, when hexafluoroethane plasma is used instead of HMDSO plasma the surface composition of the fibers clearly indicates the presence of fluorine and the material becomes highly hydrophobic.
Anti-bacterial characteristics The antibacterial properties of polyester fabric after activating its surface by
atmospheric pressure plasma and then grafting it with chitosan oligomers/polymers.
Microencapsulation Technology
It is the process by which individual particles or droplets of solid or liquid material (the core) are surrounded or coated with a continuous film of polymeric material (the shell) to produce capsules in the micrometer to millimetre
Microencapsulation provides a means of packaging, separating and storing solid and liquid materials in a microscopic scale for a later release on your own desire under controlled conditions meter range
1. Protection of the enclosed material and improved storage life.2. Conversion of a liquid component to a dry solid system.3. Ensuring separation of incompatible components.4. Odour masking, dust control and pH control5. Controlled diffusion of active components delayed drug release. 6. Change of weight or volume
FRAGRANCE FINISHING
Applications areas Cosmeto-textiles Aromatherapy Textiles Home Textiles Sport Wears Apparel
Fragrances and Human Emotions
Fragrances and Human Emotions
WHY CYCLODEXTRIN
1. B-cyclodextrin has no skin irritation, no skin sensibilisation and no mutagenic effect.2.Non-reducing cyclically linked oligosaccharides produced by certain micro-organisms of cultivated starch, which are capable of forming inclusion compounds with molecules that fit into their cone-shaped hydrophobic cavity. 3. physico-chemical properties of the compounds are changed, e.g. the vapour pressure of volatile substance is reduced, and stabilities against light or air are enhanced. 4. harmful and unpleasant Odour in the surrounding may be eliminated. 5. clamped on cellulose do not affect the cellulose’s properties, and cyclodextrins keep their ability to form inclusion complexes with other suitable molecules.
MECHANISIM OF RELEASING
1.Diffusion:It is a purely physical process, which takes place when the capsule content (active drug) is sufficiently soluble in water and body fluids, and the wall material is insoluble but permeable. This process could also be called dialytic. Diffusible drugs, the rate and pattern can be adjusted to accommodate specific requirements by modifying the composition and thickness of the wall material.2.Enzymatic digestion:It is a biochemical process, whereby the wall material is attacked and disintegrated with specific enzymes to release the content from the capsule.
3.Surface leaching through chemicals:It is purely chemical process which is chosen according to wall material to dissolve the wall material through chemical reaction and release the core material to the outside for the application.
Application
1. Padding Method 2. Exhausting 3. Spraying
Mosquito-repellent finishes
Mosquito repellent textile protects the human beings from the bite of mosquitoes and thereby promising safety from the diseases like malarial fever.
There are many natural plant products, which show mosquito repellent properties. Extracts from roots, stem, leaves, flowers, fruits and seeds of diverse species of plants exhibit mosquito repellent properties.
These extracts can be used as textile finishing agents in the crude form or as microcapsules to enhance the durability and controlled release of the extracts.
CONT….
Eucalyptus oil
It works on the same principle as DEET. o Chemical name: 1, 3,3-Trimethyl-2-oxabicyclo[2.2.2.]-octane o 1) Binder – 6% 2) Eucalyptus oil – 2% 3) DAP (Di-ammonium Phosphate) –
1% 4) Water – 91% o Initially, the samples were padded in the padding mangle and then dried at room
temparature. Then curing was done at 120 C ⁰
• LBL technique
o can be used to impart good mosquito repellency finishes with different concentrations of oil.
o Good results were obtained for the applied kind of finishes by using LBL technique.
o Due to the use of lesser chemicals, no electricity requirement etc., this method is more eco-friendly compared to padding and other techniques.
BIOFINISHING
Bio-finishing removes protruding fibres and slubs from fabrics, significantly reduces pilling, softens fabric hand and provides a smooth fabric appearance especially for knitwear and denim processing.
Types of Cellulases Action of cellulase
SRHA (Soil Release / Hydrophilic / Antistatic)
Hydroperm SRHA liq is a soil release and hydrophilizing agent for woven and
knitted synthetic fiber textiles, especially those made from polyester fibers and polyester/cellulosic fiber blends
Conventional PES finish finished with 5 % (o.w.f.) Hydroperm
5% HydropermSRHA liq unfinished
LASER FINISHING
A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation
Laser treatment is one of the technologies which are able to eliminate all the adverse effects on the environment caused by chemical treatment commonly used in textile finishing
The use of laser treatment for the purpose of wool felting shrinkage control. The major disadvantage of wool as a textile fiber is its severe felting shrinkage upon washing.
Benefit the environment by completely elaminating the hazardous chlorine compounds currently by the industry
Physical surface treatment to create the hydrophilic groups on hydrophobic fibres.
A laser selected irradiates in a strongly absorbing spectral region of the polymers
It can be achieved without affecting the thermal and mechanical properties of the fibre Surface properties affected include particle adhesion, wet ability and optical properties.
PET surface develops a well-oriented periodic structure of hills and grooves or a “ripple structure” with high energy treatment.
Polar oxidized groups like carboxyl are also included.In the study of morphological modification of laser-ablated PET fabrics, it was observed that after laser treatment the ratio of carboxylic acid groups to ester groups increased, the relative size if the amorphous regions increased.
