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原位反应改性制备抗污染抗菌PVDF/PEI超滤膜

作者：韩俊¹，张海兵²，苏茜薇¹，蒋亚妮¹，赵宇¹，孙通¹，薛云云¹，³，朱子然¹，黄强¹，²，方传杰³，朱伟伟²，朱宝库¹，³

单位： 1. 浙江大学高分子科学与工程系，膜与水处理技术教育部研究中心，杭州 310058; 2. 中化蓝天集团有限公司，杭州 310051; 3. 浙江大学绍兴研究院，大健康材料中心，绍兴 312000

关键词：聚偏二氟乙烯; 聚乙烯亚胺; 超滤膜; 原位反应; 抗污染; 抗菌

DOI号： 10.16159/j.cnki.issn1007-8924.2026.01.004

分类号： TQ028.8

出版年,卷(期):页码： 2026,46(1):37-47

摘要：

膜表面有机物吸附和形成生物膜是超滤膜污染的重要原因。为制备兼具抗污染和抗菌功能的超滤膜，本研究采用聚乙烯亚胺（PEI）与聚偏二氟乙烯（PVDF）在制膜液中共混进行原位交联、季铵化和两性离子化反应，经非溶剂诱导相分离（NIPS）路线制备出氨基、季铵盐和两性离子改性的PVDF/PEI超滤膜（PVDF-PEI-Q-Z）。考察了膜的亲水性、蛋白质吸附和截留、抗污染及抗菌等性能。研究发现，仅进行季铵化反应的超滤膜（PVDF-PEI-Q）具有良好的亲水性和抗菌性能，但蛋白质吸附能力强，抗污染性较差；同时含烷基长链季铵盐阳离子和两性离子的PVDF-PEI-Q-Z膜，兼具良好的亲水性、抑菌性和抗污染性。结果表明，制膜液中共混PEI原位反应与非溶剂诱导相转化相结合的方法，是制备兼具抗菌、抗污染功能的超滤膜的有效策略。

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.

基金项目：

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）

作者简介：

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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