Solid-solvent processing of ultrathin, highly loaded mixed-matrix membrane for gas separation

Guining Chen, Cailing Chen, Yanan Guo, Zhenyu Chu, Yang Pan, Guozhen Liu, Gongping Liu, Yu Han, Wanqin Jin, Nanping Xu

Research output: Contribution to journalArticlepeer-review

33 Scopus citations


Mixed-matrix membranes (MMMs) that combine processable polymer with more permeable and selective filler have potential for molecular separation, but it remains difficult to control their interfacial compatibility and achieve ultrathin selective layers during processing, particularly at high filler loading. We present a solid-solvent processing strategy to fabricate an ultrathin MMM (thickness less than 100 nanometers) with filler loading up to 80 volume %. We used polymer as a solid solvent to dissolve metal salts to form an ultrathin precursor layer, which immobilizes the metal salt and regulates its conversion to a metal-organic framework (MOF) and provides adhesion to the MOF in the matrix. The resultant membrane exhibits fast gas-sieving properties, with hydrogen permeance and/or hydrogen–carbon dioxide selectivity one to two orders of magnitude higher than that of state-of-the-art membranes.
Original languageEnglish (US)
Pages (from-to)1350-1356
Number of pages7
Issue number6664
StatePublished - Sep 21 2023

ASJC Scopus subject areas

  • General


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