文献类型：期刊文献

英文题名：Solvent-induced interfacial polymerization enables highly crystalline covalent organic framework membranes

作者：Wu, Yulin[1];Wang, Yixing[1];Xu, Fang[1];Qu, Kai[1];Dai, Liheng[1];Cao, Hongyan[2];Xia, Yongsheng[2];Lei, Linfeng[1];Huang, Kang[2];Xu, Zhi[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Nanjing Tech Univ, Coll Chem Engn, State Key Lab Mat Oriented Chem Engn, Nanjing 211816, Peoples R China

年份：2022

卷号：659

外文期刊名：JOURNAL OF MEMBRANE SCIENCE

收录：;EI(收录号：20222812356143);WOS:【SCI-EXPANDED(收录号:WOS:000830512100001)】；

基金：The authors gratefully acknowledge the research funding provided by National Key R & D Program of China (Grant Nos. 2021YFB3801301) and National Natural Science Foundation of China (Grant Nos. 22075076, 21908054, 21908098) .

语种：英文

外文关键词：Covalent organic frameworks; Membranes; Solvent -induced; Interfacial polymerization; High crystallinity

摘要：Covalent organic frameworks (COFs) are porous crystalline polymers with uniform pore channels and excellent stability, holding great promise in the field of membrane. The liquid-liquid interfacial polymerization is designed as an effective and convenient approach to preparing COF membranes, but the crystallinity of membranes synthesized by this method tends to be poor and thus superiorities of COF crystalline channels can hardly be utilized. In this work, a solvent-induced interfacial polymerization strategy was proposed to prepare COF membranes with high crystallinity. Due to the interaction between the acetonitrile solvent inducer and COF network, the reaction and self-assembly in film formation process were effectively manipulated. The optimized COF membrane exhibited much higher crystallinity and porosity, whose surface area was about an order of magnitude higher than the membrane prepared in the traditional system. The highly crystalline COF membrane showed significantly improved separation performance in desalination. This work provides a powerful strategy to prepare COF membranes with high crystallinity.