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Poly(vinylidene difluoride)/poly(tetrafluoroethylene-co-vinylpyrrolidone) Blend Membranes With Antifouling Properties

Poly(vinylidene difluoride)/poly(tetrafluoroethylene-co-vinylpyrrolidone) Blend Membranes With Antifouling Properties

Yuchen Sun, Saeid Rajabzadeh, Lifeng Fang, Sungil Jeon, Zhuang Zhou, Yoshikage Ohmukai, Jun Miki, Xiaolin Wang, Hideto Matsuyama

Mater Sci Eng C Mater Biol Appl. 2017 Jun 1;75:79-87.

PMID: 28415530

Abstract:

To inhibit fouling phenomenon in membrane process, a new amphiphilic copolymer, poly(tetrafluoroethylene-co-vinylpyrrolidone) (P(TFE-VP)), was blended with poly(vinylidene difluoride) (PVDF) to fabricate a series of antifouling membranes via non solvent induced phase separation (NIPS) method. The effect of copolymer blend ratios and TFE/VP ratios on membrane properties were evaluated, and the stability of P(TFE-VP) in PVDF membrane was studied. The membrane morphology was controlled by adjusting polymer concentration in dope solution, such that all membranes have similar pore size and density, as well as pure water permeability. In evaluating the effect of TFE/VP ratios, the content of VP in dope solutions was also adjusted to allow a fair comparison. We found that for P(TFE-VP) with a higher VP content, adsorption of BSA on polymer film was negligible. Higher blend ratios of this copolymer resulted in higher surface VP content and better hydrophilicity, but antifouling performance ceased to improve when blend ratio was larger than 1:9 (copolymer:PVDF). Meanwhile, a lower VP content in copolymer resulted in inferior hydrophilicity and severe fouling of the blend membranes. It was also proved that comparing with PVP homopolymer, P(TFE-VP) had satisfying stability inside PVDF membrane.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP9002840	Poly(tetrafluoroethylene)		9002-84-0	Price

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