• 文献标题:   Ultrathin, Highly Permeable Graphene Oxide/Zeolitic Imidazole Framework Polymeric Mixed-Matrix Composite Membranes: Engineering the CO2-Philic Pathway
  • 文献类型:   Article
  • 作  者:   LEE CS, SONG E, PARK JT, KIM JH
  • 作者关键词:   graphene oxide go, mixedmatrix membranes mmms, thinfilm membrane, copolymer, carbon dioxide separation
  • 出版物名称:   ACS SUSTAINABLE CHEMISTRY ENGINEERING
  • ISSN:   2168-0485
  • 通讯作者地址:  
  • 被引频次:   9
  • DOI:   10.1021/acssuschemeng.1c03917 EA AUG 2021
  • 出版年:   2021

▎ 摘  要

High-performance, thin-film mixed-matrix membranes (MMMs) on a porous support have been developed, using zeolitic imidazole framework (ZIF) decorated graphene oxide (GO) as a filler, dispersed in a poly(vinyl imidazole)-co-poly(oxyethylene methacrylate) (PVI-POEM) copolymer matrix. The low gas permeance of the neat GO-filler-based MMM was significantly improved by routing a CO2-permeable pathway through the semi-interconnected GO-ZIF nanocages. The good rubbery adhesion properties of PVI-POEM, together with the chemical similarity between PVI and the ZIF imidazole linker, induced excellent polymer/filler interface engineering in the GO-ZIF MMMs. Moreover, the GO-ZIF nanofillers were fully blanketed by the PVI-POEM copolymer, to prevent interfacial defects, while in turn an ultrathin, highly permeable GO-ZIF selective layer was formed. As a result, the GO-ZIF 5% composite MMM achieved a state of the art CO2 permeance of 995.1 GPU, retaining excellent CO2/N-2 and CO2/CH4 selectivities of 45.9 and 17.5, respectively. The CO2-philic pathway of GO-ZIF filler and good interaction bewteen the PVI-POEM and GO-ZIF generate a synergistic effect of CO2 separation, in comparison with a neat PVI-POEM composite membrane (CO2 permeance 626.4 GPU, CO2/N-2 selectivity 36.2).