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Updated: Sep 11, 2025

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
Published on: August 16, 2018
Building high-performance mixed matrix membranes from stable COF colloids for CO2/N2 separation
Qingyang Zou1, Handan Cui1, Feng Zhang1
1Hunan Provincial Key Laboratory of Micro & Nano Materials Interface Science, College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China. bswei@csu.edu.cn.
Abstract:
A "retardation & solvation" strategy was developed for synthesizing stable β-ketoenamine-linked covalent organic framework (COF) colloids. Their mixed matrix membranes (MMMs) with a Pebax-1657 matrix exhibited exceptional gas separation performance with a CO2 permeability up to 322 Barrer and a CO2/N2 selectivity over 72.1. These represent improvements of 4.25 and 1.49-fold over the pristine Pebax-1657 membrane under identical conditions, closely approaching the 2019 Robeson upper boundary.
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