文献类型：期刊文献

英文题名：Chitosan-assisted interfacial diffusion strategy for fabricating continuous ionic COF membranes

作者：Su, Ye-Heng[1];Han, Rui[1];Xu, Zhen-Liang[1,2];Wang, Sen[1];Xu, Jian-Xiong[1];Sun, Zi-Qi[1];Xu, Sun-Jie[1,2,3]

机构：[1]East China Univ Sci & Technol, Chem Engn Res Ctr, State Key Lab Chem Engn, Membrane Sci & Engn R&D Lab,Sch Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Elect Chem Innovat Inst, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2026

卷号：399

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20261920691378);WOS:【SCI-EXPANDED(收录号:WOS:001769911600001)】；

基金：The authors gratefully acknowledge the financial support received from National Natural Science Foundation of China (22078092, 22208101 and 21176067), 2025 Basic Research Plan of Science and Technology Commission of Shanghai Municipality (25JD1404900) and National Key Research and Development Program of China (2021YFB3801103 and 2021YFB3801101) .

语种：英文

外文关键词：Editor: Junyong Zhu; Ionic covalent organic frameworks; Chitosan; Interfacial diffusion; Nanofiltration; Dye salt separation

摘要：Ionic covalent organic frameworks (iCOFs) are promising materials for nanofiltration (NF) due to their ordered nanochannels and permanently charged pore surfaces. However, the introduction of ionic groups may affect the crystallization behavior and membrane assembly, which can make the construction of continuous iCOF membranes more demanding. In this work, Chitosan-assisted interfacial diffusion (ID) strategy was developed to fabricate continuous TpPa-SO3H iCOF membranes on porous nylon substrates. The pre-deposited chitosan establishes a stabilized interfacial environment and facilitates the formation of a continuous selective layer with reduced defects. Structural characterizations confirm that chitosan effectively improves membrane continuity and suppresses interfacial defects. The optimized membrane achieves a high pure water permeance of 223 L & centerdot;m(-2)& centerdot;h(-1)& centerdot;bar(-1) with a Congo red (CR) rejection of 98.6% and low salt rejection (<10%), demonstrating excellent dye-salt separation performance.