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Related Experiment Video

Updated: Apr 24, 2026

Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device
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Using Maleimide-Induced Dual Cross-Linking Method to Fabricate High-Performance Mixed Matrix Membrane.

Yuan Ji1, YinBo Wang1, Yuxi Liu1

  • 1School of Chemistry & Chemical Engineering, Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, Tianjin University of Technology, Tianjin 300384, China.

ACS Applied Materials & Interfaces
|April 22, 2026
PubMed
Summary
This summary is machine-generated.

This study developed advanced mixed matrix membranes (MMMs) using dual cross-linking for enhanced gas separation. The new membranes show superior anti-plasticization and improved CO2/CH4 selectivity, surpassing performance upper limits.

Keywords:
gas separationinterfacial compatibilitymaleimide-induced dual cross-linkingmixed matrix membranesplasticization resistancepolyimide

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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Polymer Science

Background:

  • Mixed matrix membranes (MMMs) face challenges in interfacial compatibility and anti-plasticization.
  • Zeolitic imidazolate frameworks (ZIFs) are promising fillers, but integration into polymer matrices remains difficult.

Purpose of the Study:

  • To develop MMMs with improved interfacial compatibility and anti-plasticization performance.
  • To create a dual cross-linking strategy for enhanced gas separation in MMMs.

Main Methods:

  • Prepared zeolitic imidazolate framework-8 modified with maleimide (ZIF-8-MI) as filler.
  • Blended ZIF-8-MI into a maleimide-functionalized polyimide (PMI) matrix to form MMMs.
  • Utilized thermal treatment to induce dual cross-linking via radical cycloaddition between ZIF-8-MI and PMI.

Main Results:

  • Achieved excellent interfacial compatibility and in situ cross-linking of the polyimide matrix.
  • The optimized MMM (cPI-ZIF-8-SI-20%) exhibited high CO2 permeability (1028 Barrer) and CO2/CH4 selectivity (39.2).
  • Demonstrated superior gas separation performance exceeding the Robeson 2008 Upperbound and 2018 upper limit, with a critical plasticization pressure of 44 bar.

Conclusions:

  • The dual cross-linking method significantly enhances MMMs' gas separation performance and anti-plasticization ability.
  • This approach provides a valuable reference for developing high-performance MMMs.
  • The developed MMMs show great potential for industrial gas separation applications.