Increasing both selectivity and permeability of mixed-matrix membranes: sealing the external surface of porous MOF nanoparticles

Ke Xie, Qiang Fu, Jinguk Kim, Hiep Lu, Yingdian He, Qinghu Zhao, Joel Scofield, Paul A. Webley, Greg G. Qiao

Research output: Contribution to journalArticleResearchpeer-review

38 Citations (Scopus)


A novel approach to improve the selectivity of mixed matrix membrane (MMM) systems was developed. MOF nanoparticles (NPs) were chemical coated by a PEG based shell and then incorporated into a polymer matrix to yield a MMM. The unique design of the core-shell MOF NPs can enhance both the membrane permeability and selectivity simultaneously. This membrane material exhibits excellent CO2/N2 separation performance that surpasses the latest upper bound through the most direct way. This filler was also applied to the thin-film composite membrane system, showing promising performance and placing it in the optimal zone for post-combustion CO2 capture.

Original languageEnglish
Pages (from-to)350-356
Number of pages7
JournalJournal of Membrane Science
Publication statusPublished - 1 Aug 2017
Externally publishedYes


  • Carbon dioxide capture
  • Core-shell nano particles
  • Interfacial design
  • Sealing surface
  • Upper bound

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