Ionic COF Composite Membranes for Selective Perfluoroalkyl Substances Separation,Macromolecular Rapid Communications

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Ionic COF Composite Membranes for Selective Perfluoroalkyl Substances Separation
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2022-10-22 , DOI: 10.1002/marc.202200718
Wenxiang Zhang ₁ , Yinhui Li ₁ , Zheng Xing ₁ , Minghan Zhao ₁ , Yu Fu ₁ , Shanshan Wang ₁ , Yue Wu ₁ , Jiahui Zeng ₁ , Xiaoyu Li ₁ , Heping Ma ₁

Affiliation

High-performance membranes are critical to membrane separation technology. In recent years, 2D covalent organic frameworks (2D COFs) have attracted extensive attention in the field of membrane separation due to their high porosity, ordered channels, and fine-tuned pore sizes, which are considered as excellent candidate to solve the trade-off between membrane selectivity and permeability. Herein, two kinds of ionic 2D COFs with different charge properties (termed as iCOFs) are integrated into polyacrylonitrile (PAN) substrates to form two composite membranes (PAN@iCOFs) with excellent selective perfluoroalkyl substances (PFASs) separation performance with high solvent permeability and good mechanical properties. The as-prepared PAN@iCOFs composite membranes can selectively reject more than 99.0% of positively and negatively charged PFASs in wastewater while maintaining good stability and recyclability.

中文翻译：

用于选择性全氟烷基物质分离的离子 COF 复合膜

高性能膜对膜分离技术至关重要。近年来，二维共价有机框架（2D COFs）以其高孔隙率、有序通道和微调孔径等优点在膜分离领域引起了广泛关注，被认为是解决膜分离问题的优秀候选者。膜选择性和渗透性之间的关系。在此，将两种具有不同电荷特性的离子二维 COFs（称为 iCOFs）集成到聚丙烯腈（PAN）基底中，形成两种复合膜（PAN@iCOFs），具有优异的选择性全氟烷基物质（PFASs）分离性能，具有高溶剂渗透性和良好的机械性能。所制备的 PAN@iCOFs 复合膜可以选择性地拒绝超过 99 个。

更新日期：2022-10-22

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