• [Review]
  • Interfacial Structure of ZIF-8 Mixed-Matrix Membranes: Thermal Stability and Gas Transport Properties
  • Sieun Jung, Inhye Shin, and Won-Gyu Bae*,†

  • Department of Chemical Engineering, Soongsil University, Dongjak-gu 06978, Korea
    *Department of Electrical Engineering, Soongsil University, Dongjak-gu 06978, Korea

  • ZIF-8 혼합기질막의 계면 구조: 열적 안정성과 기체 수송 특성
  • 정시은 · 신인혜 · 배원규*,†

  • 숭실대학교 화학공학과, *숭실대학교 전기공학부

  • Reproduction, stored in a retrieval system, or transmitted in any form of any part of this publication is permitted only by written permission from the Polymer Society of Korea.

Abstract

As the importance of low-energy and high-efficiency gas separation has increased in industrial processes, polymer membranes have attracted attention because they do not require phase transition and are suitable for modular process design. However, in zeolitic imidazolate framework (ZIF)-8 mixed-matrix membranes (MMMs), insufficient interfacial control can lead to unstable dispersion, aggregation, and incomplete interfacial adhesion, resulting in nonselective void formation and reduced selectivity, thereby limiting their practical applicability. This review focuses on ZIF-8 MMMs and examines how the ZIF-8–polymer interfacial structure regulates thermal stability and gas transport properties. Furthermore, this review summarizes approaches for improving performance reproducibility based on surface functionalization, compatibilizer incorporation, and optimal filler-loading window design, and proposes interfacial design directions for practical process applications.


최근 산업 공정에서 저에너지·고효율 기체 분리의 중요성이 확대되며, 상변화를 수반하지 않고 모듈화가 용이한 고분자 분리막이 주목받고 있다. 그러나 zeolitic imidazolate framework(ZIF)-8 혼합기질막(mixed-matrix membrane, MMM)에서 계면 제어가 충분하지 않으면, 분산 불안정, 응집, 불완전한 계면 접착이 비선택적 공극 형성과 선택도 저하로 이어져 적용 범위가 제한된다. 본 총설은 ZIF-8 MMM에 주목하여, ZIF-8-고분자 계면 구조가 열적 안정성과 기체 수송 특성을 조절하는 방식을 검토한다. 나아가 표면 기능화, 상용화제 도입, 최적 충전량 창 설계를 중심으로 성능 재현성 확보 방안을 정리하고, 실제 공정 적용을 위한 계면 설계 방향을 제시한다.


Keywords: zeolitic imidazolate framework-8, mixed-matrix membrane, interfacial structure, thermal stability, gas transport.

  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2025 Impact Factor : 1.0
  • Indexed in SCIE

This Article

  • 2026; 50(5): 637-645

    Published online Sep 25, 2026

  • 10.7317/pk.2026.50.5.637
  • Received on May 8, 2026
  • Revised on Jul 6, 2026
  • Accepted on Jul 6, 2026

Correspondence to

  • Won-Gyu Bae
  • Department of Electrical Engineering, Soongsil University, Dongjak-gu 06978, Korea

  • E-mail: wgbae@ssu.ac.kr