Related Experiment Video
Updated: Jun 18, 2026

Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes
Published on: December 15, 2015
Assembly-Dissociation-Reconstruction Synthesis of Covalent Organic Framework Membranes with High Continuity for
Hao Zhang1, Tianci Shao1, Zeliang Cheng1
1Faculty of Chemistry, Northeast Normal University, Changchun, 130024, P. R. China.
Abstract:
Covalent organic frameworks (COFs), at the forefront of porous materials, hold tremendous potential in membrane separation; however, achieving high continuity in COF membranes remains crucial for efficient gas separation. Here, we present a unique approach termed assembly-dissociation-reconstruction for fabricating COF membranes tailored for CO2/N2 separation. A parent COF is designed from two-node aldehyde and three-node amine monomers and dissociated to high-aspect-ratio nanosheets. Subsequently, COF nanosheets are orderly reconstructed into a crack-free membrane by surface reaction under water evaporation. The membrane exhibits high crystallinity, open pores and a strong affinity for CO2 adsorption over N2, resulting in CO2 permeance exceeding 1060 GPU and CO2/N2 selectivity surpassing 30.6. The efficacy of this strategy offers valuable guidance for the precise fabrication of gas-separation membranes.
More Related Videos
08:42Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
Published on: July 10, 2017
07:45Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
Published on: August 16, 2018
Related Concept Videos
Detergent Purification of Membrane Proteins
High-Performance Liquid Chromatography: Elution Process
Supercritical Fluid Chromatography
SFC utilizes a supercritical fluid mobile phase,...
Downstream Processing