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Antibacterial and antifouling PEI/PVDF ultrafiltration membranes prepared via an in-situ reactive modification route

Authors： HAN Jun1, ZHANG Haibing2, SU Qianwei1, JIANG Yani1， ZHAO Yu1, SUN Tong1, XUE Yunyun1,3, ZHU Ziran1, HUANG Qiang1,2, FANG Chuanjie3, ZHU Weiwei2, ZHU Baoku1,3

Units： 1. Department of Polymer Science and Engineering, Engineering Research Center of Membrane and Water Treatment MOE, Zhejiang University, Hangzhou 310058, China; 2. Sinochem Lantian Co., Ltd.，Hangzhou 310051, China; 3. Shaoxing Institute, Zhejiang University, Shaoxing 312000, China

KeyWords： poly(vinylidene fluoride); poly(ethylene imine); ultrafiltration membrane; in-situ reaction; antifouling; antibacterial

ClassificationCode：TQ028.8

year,volume(issue):pagination： 2026,46(1):37-47

Abstract：

The absorption of organic substance and formation of biofilm contribute the main roles for fouling in ultrafiltration (UF) process. To create the UF membrane with antifouling and antibacterial performances, in this work, the poly(vinylidene fluoride) (PVDF)/poly(ethylene imine) (PEI) blend membranes were proposed and fabricated via a combining route of in situ reaction in casting solution (including sequential crosslinking, ammonification, quaternization and zwitterionization) and none-solvent induced phase separation process. The effects of amine, alkyl contained quaternary ammonium and zwitteric ion units in membranes on the hydrophilicity, protein absorption, antifouling and antibacterial properties of PVDF/PEI membranes were investigated. It was found that the membrane of alkyl contained quaternary ammonium behaved better hydrophilicity and antibacterial performance, but the antifouling property was worse due to the strong absorption of protein. The PVDF/PEI membrane containing quaternary ammonium and zwitteric ion, the excellent hydrophilic, antifouling and antibacterial properties were realized simultaneously. Basing above results, it could be primarily concluded that in situ quaternization and zwitterionization of PEI in casting solution provide an ideal and applicable choice for preparation of antifouling and antibacterial blend UF membranes.

Funds：

国家重点研发计划中国埃及政府间联合研究旗舰项目（2025YFE0121100）; 浙江省自然科学基金（LD22E030006）; 中央高校基础研究项目（226-2022-00020）

AuthorIntro：

韩俊（1994-），男，黑龙江安达人，硕士研究生，研究方向为超滤膜材料

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