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The synthesis of a new type of amphiphilic copolymer and its effects on the properties of the modified poly-vinylidene fluoride membrane

Authors： Y. LI1, X.J. ZHOU1,2, S.S. SHEN1,2, J.J. YANG1,2, R.B. BAI1,2*

Units： 1Center for Separation and Purification Materials and Technologies, 2Jiangsu Collabrative Innovation Center of Technology and Material of Water Treatment, Suzhou University of Science and Technology, No. 1 Kerui Road, Suzhou,215009

KeyWords： Amphiphilic copolymersynthesis；Modified PVDF membrane；Hydrophilic and anti-fouling improvement

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2016,36(6):70-77

Abstract：

In this study, a new type of amphiphilic copolymer, PSxMAAy, was synthesized through an easily one-step method of the free radical polymerization, and was used as an additive to prepare a series of modified PVDF membranes by blending with PVDF and casting their homogeneous solution through the liquid precipitation phase inversion technique. The results showed that PSxMAAy has a well compatibility with PVDF. And those containing a higher ratio of MAA, PS1MAA1 showed better hydrophilicity and anti-fouling modification effect on modified membranes. Decided by the proportion of additive, the hydrophilic were improved greatly for modified membrane (the water contact angle of the membranes can be reduced from 93.5°for PVDF to 62.1° for modified PVDF membranes). The anti-fouling ability of protein was significantly enhanced.. The static adsorption amount of BSA on the modified membranes can be decreased by 82% as compared with that for the unmodified membrane. For the filtration of BSA solution and hexadecane emulsion, the modified membranes also showed much higher rejection rate, lower flux decay and higher flux recovery after cleaning.

Funds：

基金项目：国家自然科学基金项目（51478282）；苏州市分离净化材料与技术重点实验室（SZS201512）；苏州市水利水务科研课题（2015-7-1）；苏州科技学院校科研基金项目（XKQ201502）

AuthorIntro：

作者简介：李妍（1991-），女，山东省枣庄市，硕士研究生，就读于苏州科技大学，主要从事聚偏氟乙烯膜的改性研究，师承白仁碧教授。*通讯作者，白仁碧，E-mail：ceebairb@live.com，教授，博士生导师，主要从事膜材料及膜技术的研究。

Reference：

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