Premium
Scalable Fabrication of Crystalline COF Membranes from Amorphous Polymeric Membranes
Author(s) -
Fan Chunyang,
Wu Hong,
Guan Jingyuan,
You Xinda,
Yang Chao,
Wang Xiaoyao,
Cao Li,
Shi Benbing,
Peng Quan,
Kong Yan,
Wu Yingzhen,
Khan Niaz Ali,
Jiang Zhongyi
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202102965
Subject(s) - membrane , amorphous solid , covalent organic framework , monomer , materials science , chemical engineering , fabrication , hydrogen bond , imine , polymer , proton transport , covalent bond , polymer chemistry , nanotechnology , chemistry , organic chemistry , molecule , composite material , catalysis , medicine , biochemistry , alternative medicine , pathology , engineering
Covalent organic framework (COF) membranes hold potential for widespread applicability, but scalable fabrication is challenging. Here, we demonstrate the disorder‐to‐order transformation from amorphous polymeric membrane to crystalline COF membrane via monomer exchange. Solution processing is used to prepare amorphous membrane and the replacing monomer is selected based on the chemical and thermodynamical stability of the final framework. Reversible imine bonds allow the extraneous monomers to replace the pristine monomers within amorphous membrane, driving the transformation from disordered network to ordered framework. Incorporation of intramolecular hydrogen bonds enables the crystalline COF to imprint the amorphous membrane morphology. The COF membranes harvest proton conductivity up to 0.53 S cm −1 at 80 °C. Our strategy bridges amorphous polymeric and crystalline COF membranes for large‐scale fabrication of COF membranes and affords guidance on materials processing.