Abstract A novel high-performance nanofiltration membrane was fabricated by a simple and scalable route involving in situ cross-linking of hydrophilic, cheap, and environmentally friendly vanillin as antifouling agent with polysulfone (PSf) for salt rejection performance. Vanillin acts as a porogen, which induces a negative surface charge on the membrane surface due to the presence of polar functional groups like alcohol and aldehyde. The surface properties, including charge, morphology, and hydrophilicity, were investigated in detail using analytical instruments. The nanofiltration performance of the fabricated PSf-vanillin membranes was dependent on the percentage of vanillin added in the casting solution. The PSf-vanillin membrane antifouling tests were evaluated using 200 mg/L bovine serum albumin (BSA), and results showed 99% rejection with 88.55% flux recovery ratio. Performance studies were compared with commercially available TRISEP® UA60 nanofiltration membrane. PSf-vanillin membrane M2 showed higher MgSO4 (87.49%), NaCl (25.78%) rejection with excellent antifouling properties compared to commercial UA60 membrane. It is believed that charged membranes are the building blocks for the development of future generation desalination membranes possessing high permeability and selectivity index. The developed membranes have potential niche application in the pre-treatment of feed solution.

中文翻译：

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新型高渗透防污聚砜-香兰素膜的制备

摘要 通过简单且可扩展的途径制备了一种新型高性能纳滤膜，包括亲水、廉价且环保的香草醛作为防污剂与聚砜（PSf）的原位交联，以提高脱盐性能。香兰素充当致孔剂，由于醇和醛等极性官能团的存在，它会在膜表面诱导负表面电荷。使用分析仪器详细研究了表面性质，包括电荷、形态和亲水性。制备的 PSf-香草醛膜的纳滤性能取决于添加到浇铸溶液中的香草醛的百分比。使用 200 mg/L 牛血清白蛋白 (BSA) 评估 PSf-香草醛膜防污试验，结果显示 99% 的去除率和 88.55% 的通量回收率。性能研究与市售的 TRISEP® UA60 纳滤膜进行了比较。与商用 UA60 膜相比，PSf-香草醛膜 M2 显示出更高的 MgSO4 (87.49%)、NaCl (25.78%) 截留率和优异的防污性能。据信，带电膜是开发具有高渗透性和选择性指数的下一代海水淡化膜的基石。开发的膜在进料溶液的预处理中具有潜在的利基应用。78%) 截留率与商用 UA60 膜相比具有出色的防污性能。据信，带电膜是开发具有高渗透性和选择性指数的下一代海水淡化膜的基石。开发的膜在进料溶液的预处理中具有潜在的利基应用。78%) 截留率与商用 UA60 膜相比具有出色的防污性能。据信，带电膜是开发具有高渗透性和选择性指数的下一代海水淡化膜的基石。开发的膜在进料溶液的预处理中具有潜在的利基应用。