Abstract We developed a facile approach to synthesize thin-film nano-templated composite (TFNt) nanofiltration membrane with high water permeability, high NaCl/MgSO4 selectivity and strong antimicrobial properties. A polydopamine (PDA) coating on a polysulfone support was used as a nano-template to generate silver nanoparticles (AgNPs) in situ with high loading and high uniformity. A subsequent interfacial polymerization reaction of piperazine and trimesoyl chloride was performed on this nano-template substrate to form the TFNt membrane. The TFNt membrane had significantly increased both the water permeability and salt rejection compared to the control thin-film composite (TFC) membrane as well as a thin-film nanocomposite (TFN) membrane prepared by the conventional way of loading AgNPs directly during the interfacial polymerization process. Furthermore, the TFNt membrane showed better antimicrobial properties than both the TFC and the conventional TFN membranes. The current work presents an exciting approach to fabricate novel nanofiltration membranes using nano-templates, which provides important insights for high performance NF membrane synthesis.

中文翻译：

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一种具有原位银纳米粒子负载的新型薄膜纳米模板复合膜：分离性能增强和意义

摘要 我们开发了一种简便的方法来合成具有高透水性、高 NaCl/MgSO4 选择性和强抗菌性能的薄膜纳米模板复合 (TFNt) 纳滤膜。聚砜载体上的聚多巴胺 (PDA) 涂层被用作纳米模板，以原位生成具有高负载和高均匀性的银纳米粒子 (AgNPs)。随后在该纳米模板基底上进行哌嗪和均苯三甲酰氯的界面聚合反应以形成 TFNt 膜。与对照薄膜复合 (TFC) 膜以及通过在界面聚合过程中直接加载 AgNPs 的常规方法制备的薄膜纳米复合 (TFN) 膜相比，TFNt 膜的透水性和脱盐率均显着提高过程。此外，TFNt 膜显示出比 TFC 和传统 TFN 膜更好的抗菌性能。目前的工作提出了一种使用纳米模板制造新型纳滤膜的令人兴奋的方法，这为高性能 NF 膜的合成提供了重要的见解。