Abstract Antifouling performance of nanofiltration membrane is critical in applications like water treatment. In this study, surface zwitterionization was conducted by 1, 3-propanesultone ring-opening directly on the nanofiltration membrane prepared by interfacial polymerization of 3,3′-diamino-N-methyldipropylamine and 1, 3, 5-benzenetricarboxylic chloride. The zwitterionic structures improve the hydrophilicity of nanofiltration membrane, thus increase the water permeability and antifouling performance. The zwitterionic membrane have a 72 L m−2 h−1 water flux at the optimize condition, which was about 2.4 times that of the pristine membrane without zwitterionization, and with a 89% rejection of MgCl2. Meanwhile, the zwitterionic membrane will have better antifouling performance to protein and polysaccharose. The flux recovery ratio of bovine serum albumin, sodium alginate and lysozyme were all above 95%. The prepared zwitterionic membrane presents prominent high water flux and fouling-resistance performance, indicating it's promising application potential in organic wastewater treatment.

中文翻译：

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构建纳滤膜两性离子表面以实现高通量和防污性能

摘要 纳滤膜的防污性能在水处理等应用中至关重要。在本研究中，表面两性离子化是通过 1, 3-丙烷磺内酯直接在 3,3'-二氨基-N-甲基二丙胺和 1, 3, 5-苯三甲酰氯界面聚合制备的纳滤膜上开环进行的。两性离子结构提高了纳滤膜的亲水性，从而提高了透水性和防污性能。两性离子膜在优化条件下具有 72 L m-2 h-1 的水通量，大约是未经两性离子化的原始膜的 2.4 倍，并且对 MgCl2 的截留率为 89%。同时，两性离子膜对蛋白质和多糖具有更好的防污性能。牛血清白蛋白、海藻酸钠和溶菌酶的通量回收率均在95%以上。制备的两性离子膜具有显着的高水通量和抗污染性能，表明其在有机废水处理中具有广阔的应用潜力。