Smart responsive nanofiltration (NF) membranes generated widespread interest for their ability to dynamically regulate permselectivity during operation according to the requirements of the separation. However, the reported smart membranes were usually impeded by limited stability as the problem of compatibility between conductive materials and a polymer membrane. Herein, we report a high-performance electrically responsive polyamide (PA) membrane for molecular NF by introducing an oligoaniline of amino-capped aniline trimer (AT) involved in the formation of a PA membrane. The membranes were prepared via interfacial polymerization (IP) of AT and trimesoyl chloride (TMC) on a porous substrate. The influence of AT, TMC, and dopant of the AT concentration on the membrane performance was systematically investigated. The results demonstrate that the introduction of AT significantly enhances the molecular separation performance of the membranes. The fabricated membranes exhibit excellent rejection toward small organic molecules while maintaining high water permeance and excellent long-term stability. Moreover, the membranes show remarkable electrocyclic responsiveness, allowing for effective control of the rejection rate by applying an external electric field. The improved performance of the membranes is attributed to the unique electrical and structural properties of AT doping by ionic liquids. Our findings provide valuable insights for the development of high-performance molecular nanofiltration membranes.

中文翻译：

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用于高性能分子纳滤的低聚苯胺基电响应聚酰胺膜的制造

智能响应纳滤 (NF) 膜因其在操作过程中根据分离要求动态调节渗透选择性的能力而引起了广泛的兴趣。然而，由于导电材料和聚合物膜之间的兼容性问题，所报道的智能膜通常受到稳定性有限的阻碍。在此，我们通过引入参与 PA 膜形成的氨基封端苯胺三聚体 (AT) 的苯胺低聚物，报道了一种用于分子 NF 的高性能电响应聚酰胺 (PA) 膜。该膜是通过 AT 和均苯三甲酰氯 (TMC) 在多孔基材上的界面聚合 (IP) 制备的。系统研究了AT、TMC和AT浓度的掺杂剂对膜性能的影响。结果表明AT的引入显着增强了膜的分子分离性能。所制造的膜对小有机分子表现出优异的排斥性，同时保持高透水性和优异的长期稳定性。此外，该膜表现出显着的电循环响应性，允许通过施加外部电场来有效控制截留率。膜性能的提高归因于离子液体AT掺杂的独特电学和结构特性。我们的研究结果为高性能分子纳滤膜的开发提供了宝贵的见解。