Issue 33, 2020

Nano-confinement-inspired metal organic framework/polymer composite separation membranes

Abstract

A defect-free, robust and selective barrier is essential for manufacturing membranes with targeted high permeability and selectivity. Here we report a new route to engineering a separation composite membrane by confining both channels in nanoscale metal organic frameworks (MOFs) and charges in a polyelectrolyte in the inner space of a porous support via a counter-diffusion method. A simple thermal annealing treatment of the interface between the MOF, polymer and support favorably reduced voids inside this nano-confinement environment. As this composite membrane combines both the support and barrier as one, it minimizes mass transfer resistance of water molecules. In a separation test, it readily achieved the state-of-the-art permeance. This simple chemical approach to upgrade membrane structures will offer wide opportunities in separation devices.

Graphical abstract: Nano-confinement-inspired metal organic framework/polymer composite separation membranes

Supplementary files

Article information

Article type
Paper
Submitted
01 Mar 2020
Accepted
23 Jul 2020
First published
25 Jul 2020

J. Mater. Chem. A, 2020,8, 17212-17218

Nano-confinement-inspired metal organic framework/polymer composite separation membranes

X. Li, N. Wang, X. Bao, Q. Li, J. Li, Y. Xie, S. Ji, J. Yuan and Q. An, J. Mater. Chem. A, 2020, 8, 17212 DOI: 10.1039/D0TA02412K

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