iScience (Jun 2021)

Polymerizable metal-organic frameworks for the preparation of mixed matrix membranes with enhanced interfacial compatibility

  • Ziman Chen,
  • Dong Yan,
  • Liang Ma,
  • Yahui Zhang,
  • Jingyan Zhang,
  • Hui Li,
  • Rebecca Khoo,
  • Jian Zhang,
  • Frantisek Svec,
  • Yongqin Lv,
  • Tianwei Tan

Journal volume & issue
Vol. 24, no. 6
p. 102560

Abstract

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Summary: The preparation of flawless and defect-free mixed matrix membranes (MMMs) comprising metal-organic framework (MOF) and polymer is often difficult owing to the poor MOF/polymer interface compatibility. Herein, we present the synthesis of an important family of pillared-layered MOFs with polymerizable moieties based on the parent structure [Zn2L2P]n [L = vinyl containing benzenedicarboxylic acid linkers; P = 4,4′-bipyridine (bipy)]. The crystalline structures of polymerizable MOFs were analyzed using single-crystal X-ray crystallography. The presence of reactive double bonds in MOFs was verified by the successful thiol-ene click reaction with sulfhydryl compounds. The subsequent copolymerization of polymerizable MOFs with organic monomers produced mixed matrix membranes with enhanced MOF/polymer interfacial adhesion that enabled good separation efficiency of CO2 from flue gas. This strategy provides a stimulating platform to the preparation of highly efficient MMMs that are capable of mitigating energy consumption and environment issues.