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Hydrophilic modification of PES membrane with DMA-MPC copolymer and protein anti-fouling study

Authors： YANG Ziyun,CHEN Cong,LIU Qiaohong,LI Yaqian,PENG Yuelian ,AN Quanfu

Units： Beijing University of Technology, Facility of Environmental and Life Science, Beijing, 100124

KeyWords： PES, hydrophilic modification, zwitterionic copolymer, dopamine derivatives, protein anti-fouling

ClassificationCode：TQ 28

year,volume(issue):pagination： 2023,43(4):1-9

Abstract：

Abstract: Adsorption of protein seriously restricts the practical application of polyether sulfone (PES) membrane, and improving the hydrophilicity of membrane surface is an effective method to reduce the phenomenon of membrane fouling. In this study, the surface of a plasma-treated PES membrane was grafted polydopamine methylacrylamide-2-methylacryloxyethyl phosphate choline (DMA-MPC) by one-step deposition, then the hydrophilicity and anti-fouling properties of the modified membrane were investigated. The results showed that plasma treatment increased the number amine reaction sites on PES membrane surface, which react with DMA-MPC and form a stable covalent bond. Under the optimum modification conditions, the water contact angle of PES membrane can be reduced to 37.7±1°, the bovine serum protein (BSA) flux increased to 1060±30 L/(m2⋅h⋅MPa), while maintaining a high rejection rate of BSA at the same time. Moreover, the flux retention rate increased from 47±1% to 73±1%. The modified membrane showed excellent stability in the cycle test, providing a new method to reduce the adsorption of proteins on the PES membrane surface.

Funds：

国家自然科学基金（22125801）

AuthorIntro：

杨紫云（1998-），女，山东烟台人，硕士，研究方向膜分离，E-mail：yzy@emails.bjut.edu.cn

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