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Polyvinylidene fluoride

(PVDF) Membranes

MOHD HAFIZUDDIN BIN ZAHARI

(KE08061)

MOHD KHAIRUL RABANI BIN MOHD

YUSOFF (KE08053)

ABU HASSAN BIN MOHD NAZIR

(KE08020)

SHAIKH MUHAMAD AZAHARI BIN

SHAIKH ABD RAHMAN (KE08057)

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INTRODUCTION

PVDF is a specialty plastic material in

the fluoropolymer family; it is used

generally in applications requiring the

highest purity, strength, and

resistance to solvents, acids, bases

and heat and low smoke generation

during a fire event.

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Polyvinylidene fluoride PVDF

IUPAC name: poly-1,1-difluoroethene

Other names: polyvinylidene difluoride, KYNAR,

HYLAR, SOLEF, SYGEF

Molecular formula -(C2H2F2)n-

Appearance: whitish or translucent

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Mechanical properties

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PVDF membrane

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Preparation method

Techniques :

Water precipitationWater vapour absorption

Thermal gelation

Solvent evaporation

Mostly used = water precipitation

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Preparation method

Polymer Solution(PVDF + N,N-dimethylacetamide)

Casting(using hand-casting knife)

Precipitation(immersed in water bath)

Annealing(at 160C)

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ADVANTAGESAdvantage Journal

better protein retention, physical strength and broad

chemical compatibility

Pluskal et al. 1986

shown to have better retention of total HIV antigens and

improved detection of antibodies to glycosylated

envelope antigens

Lauritzen and Pluskal. 1988

replicate lanes from a single gel can be used for various

applications

Kurien et al. 2003

Attributes/Applications Nitrocellulose PVDF

Physical strength Poor Good

Protein binding capacity 80- 100 g/cm2 100- 300 g/cm2

Solvent resistance No Yes

WESTERN BLOTTING TEST

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LIMITATIONPURIFICATION AND SEPERATION OF AQUEOUS SOLUTION

Low surface energy

It is because due to strong hydrophobic nature of PVDF,

therefore the pure water flux is usually low.

Susceptible to fouling while treat with solution

contain natural organic

It is because natural organic like protein are prone to beeasily absorbed onto the membrane surface and block the

membrane pores. The lifetime of membrane will depressing

and subsequently causing more operation costs of thereplacement and maintenance of the membrane modules.

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Current Status and Development

Consider as pure polymer (suitable for

biomedical and bioseparation applications). Can be crosslinked when subjected to electron

beam radiation or gamma radiation.

Have great potential in separation due to itschemical and physical properties.

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Limitation

Low surface energy

Easily become fouling

when aqueous

solution containing

natural organic is used

Development

(Surface

Modification)

Surface coating

Surface grafting

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Application

Used in Western blotting

Application in air-coupled transducercalibration

Use in variety of staining applications and

reprobing in immunodetection Suitable for wastewater treatment

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THANK YOU