Melt polymerization synthesis of a class of robust self-shaped olefin-linked COF foams as high-efficiency separators  

作　　者：Penghui Zhang Zhifang Wang Yi Yang Sa Wang Ting Wang Jinjin Liu Peng Cheng Yao Chen Zhenjie Zhang 

机构地区：[1]State Key Laboratory of Medicinal Chemical biology,College of Chemistry,Nankai University,Tianjin,300071,China [2]Key Laboratory of Advanced Energy Materials Chemistry,Ministry of Education,Nankai University,Tianjin,300071,China [3]College of Pharmacy,Nankai University,Tianjin,300071,China [4]Renewable Energy Conversion and Storage Center,Nankai University,Tianjin,300071,China

出　　处：《Science China Chemistry》2022年第6期1173-1184,共12页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (22175099);111 Projects (B12015);Frontiers Science Center for New Organic Matter (63181206)。

摘　　要：The practical applications of crystalline porous materials toward industrial separations require shaping them into robust monoliths(e.g., foams). The current methods are often complicated, environmentally unfriendly, and unscalable, significantly hampering their practical application. Herein, we report a scalable, facile “one-step thermomolding” method to fabricate a class of hierarchically olefin-linked covalent organic framework(COF) foams via melt polymerization. The obtained pure COF foams possess higher crystallinity and porosity than literature, good moldability, and processability, greatly benefiting their practical applications(e.g., efficient oil-water separation with 99% removal efficiency and >100 cycle reusability). Moreover, a COF exhibiting the smallest(0.58 nm) eclipsed stacking pore among all 2-dimensional COFs with neutral skeletons is first fabricated via this protocol, demonstrating good C2 H2 purification performance and recyclability, surpassing the current benchmark materials. We believe that this facile fabrication strategy can promote access to a broad diversity of new COF foams and enlighten further avenues for green routes to large-scale synthesis and usage of COFs.

关 键 词：covalent organic framework separation foam melt polymerization 

分 类 号：TQ051.893[化学工程]