The enhanced hydrogen separation performance of mixed matrix membranes by incorporation of two-dimensional ZIF-L into polyimide containing hydroxyl group

Seungju Kim, Ezzatollah Shamsaei, Xiaocheng Lin, Yaoxin Hu, George P. Simon, Jong Geun Seong, Ju Sung Kim, Won Hee Lee, Young Moo Lee, Huanting Wang

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This paper reports the preparation of mixed matrix membranes (MMMs) by incorporating a two-dimensional zeolitic imidazolate framework-L (ZIF-L) into a highly gas permeable hydroxyl group-containing polyimide (PI) for hydrogen separation. ZIF-L has a leaf-shaped morphology with excellent CO2 adsorption properties due to strong interaction between ZIF-L and CO2 molecules. The dispersion of ZIF-L crystals in the polymer phase increased CO2 adsorption and restricted CO2 transport through MMMs, resulting in a significant increase of H2 selectivity over CO2. The gas transport properties of MMMs with a ZIF-L loading up to 20 wt% were investigated, and the results showed such MMMs had a H2 permeability of 260 Barrers and ideal H2/CO2 selectivity of 13.4 at room temperature. The membranes presented here have the potential for large-scale fabrication for hydrogen separation applications.

Original languageEnglish
Pages (from-to)260-266
Number of pages7
JournalJournal of Membrane Science
Publication statusPublished - 1 Mar 2018


  • Gas separation
  • Hydrogen separation
  • Metal organic framework
  • Mixed matrix membranes
  • Polyimide
  • Zeolitic imidazolate framework
  • ZIF-L

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