膜
共价键
材料科学
纳滤
纳米技术
气体分离
化学工程
堆积
结晶度
网络共价键合
化学
有机化学
复合材料
生物化学
工程类
作者
Xiaojun Sun,Mengting Di,Jie Liu,Gao Li,Xiaoming Yan,Gaohong He
出处
期刊:Small
[Wiley]
日期:2023-06-28
卷期号:19 (44)
被引量:32
标识
DOI:10.1002/smll.202303757
摘要
Abstract Covalent organic frameworks (COFs) are porous crystalline polymeric materials formed by the covalent bonding of organic units. The abundant organic units library gives the COFs species diversity, easily tuned pore channels, and pore sizes. In addition, the periodic arrangement of organic units endows COFs regular and highly connected pore channels, which has led to the rapid development of COFs in membrane separations. Continuous defect‐free and high crystallinity of COF membranes is the key to their application in separations, which is the most important issue to be addressed in the research. This review article describes the linkage types of covalent bonds, synthesis methods, and pore size regulation strategies of COFs materials. Further, the preparation strategies of continuous COFs membranes are highlighted, including layer‐by‐layer (LBL) stacking, in situ growth, interfacial polymerization (IP), and solvent casting. The applications in separation fields of continuous COFs membranes are also discussed, including gas separation, water treatment, organic solvent nanofiltration, ion conduction, and energy battery membranes. Finally, the research results are summarized and the future prospect for the development of COFs membranes are outlined. More attention may be paid to the large‐scale preparation of COFs membranes and the development of conductive COFs membranes in future research.
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