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Preparation and Study of Polyvinylidene Fluoride Graft Copolymer Fiber Membrane for Oil-Water Separation

Authors： XU Fei, YOU Meng, ZHANG Shuyou, WANG Hua, MENG Jianqiang

Units： State Key Laboratory of Separation Membrane and Process, School Materials Science and Engineering, Tiangong University, Tianjin, 300387, China

KeyWords： PVDF; graft copolymer; electrospinning; oil/water separation; antifouling

ClassificationCode：TB34

year,volume(issue):pagination： 2022,42(1):88-97

Abstract：

The PVDF graft copolymer was prepared by grafting oligoethylene glycol monomethyl ether (OEGMA) onto the PVDF via atom transfer radical polymerization (ATRP). The hydrophilic PVDF-g-PEGMA-w fibrous membrane was prepared using electrospinning technology containing a heat treatment process, to improve the hydrophilicity. The results showed that water contact angle of the PVDF-g-POEGMA membrane decreased from 85 o to 0° within 5 s, the tensile strength was 2.7 MPa, and the oil intrusion pressure was 3.01 kPa. During the “dead-end” filtration, the water flux of filtering the dispersed oil mixture reached up to 11,630 L/(m2h) under the gravity-driven condition. During cross-flow oil/water emulsion filtration, the PVDF-g-PEGMA-w membrane exhibited a high water flux and a separation efficiency higher than 99% for several oil/water emulsions. After 3 cycles of fouling tests, the flux recovery rate of the modified membrane remained above 91%, exhibiting excellent antifouling property.

Funds：

国家自然科学基金（21875162，22075206）.（一般不接受无项目资助的论文，除非具有重大学术价值.）

AuthorIntro：

许飞（1996），男，辽宁锦州人，硕士生，油水分离膜研究

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