Shen Yun, Li Yiming, Yuan Shideng, Shen Jiangnan, Wang Dong, Zhang Na, Niu Jingyu, Wang Ziming, Wang Zhining
Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, Qingdao 266100, P. R. China.
Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao 266237, P. R. China.
Nano Lett. 2024 Aug 21;24(33):10169-10176. doi: 10.1021/acs.nanolett.4c02403. Epub 2024 Aug 7.
Organic solvent nanofiltration (OSN) membranes with high separation performance and excellent stability in aggressive organic solvents are urgently desired for chemical separation. Herein, we utilized a polyfunctional arylamine tetra-(4-aminophenyl) ethylene (TAPE) to prepare a highly cross-linked polyamide membrane with a low molecular weight cut-off (MWCO) of 312 Da. Owing to its propeller-like conformation, TAPE formed micropores within the polyamide membrane and provided fast solvent transport channels. Importantly, the rigid conjugated skeleton and high connectivity between micropores effectively prevented the expansion of the polyamide matrix in aggressive organic solvents. The membrane maintained high separation performance even immersed in ,-dimethylformamide for 90 days. Based on the aggregation-induced emission (AIE) effect of TAPE, the formation of polyamide membrane can be visually monitored by fluorescence imaging technology, which achieved visual guidance for membrane fabrication. This work provides a vital foundation for utilizing polyfunctional monomers in the interfacial polymerization reaction to prepare high-performance OSN membranes.
对于化学分离而言，迫切需要在腐蚀性有机溶剂中具有高分离性能和出色稳定性的有机溶剂纳滤（OSN）膜。在此，我们利用多官能芳胺四（4-氨基苯基）乙烯（TAPE）制备了一种低截留分子量（MWCO）为312 Da的高度交联聚酰胺膜。由于其螺旋桨状构象，TAPE在聚酰胺膜内形成微孔并提供快速的溶剂传输通道。重要的是，刚性共轭骨架和微孔之间的高连接性有效地防止了聚酰胺基质在腐蚀性有机溶剂中的膨胀。即使将该膜浸入N，N-二甲基甲酰胺中90天，它仍保持高分离性能。基于TAPE的聚集诱导发光（AIE）效应，聚酰胺膜的形成可以通过荧光成像技术进行可视化监测，这实现了对膜制备的可视化指导。这项工作为在界面聚合反应中利用多官能单体制备高性能OSN膜提供了重要基础。
