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Abstract <p>Cellulose membranes are sustainable alternatives to synthetic polymer-based membranes because of their inherent biocompatibility, biodegradability, and eco-friendliness. However, their broader industrial use remains limited to applications such as water filtration, bioseparation, and gas separation, primarily because of their insufficient permeability, low porosity, and poor mechanical stability under practical operating conditions. This study presents a sustainable strategy for enhancing cellulose membranes by incorporating cellulose particles as chemically identical pore-forming agents. This enables effective surface functionalization with zeolitic imidazolate framework-8 (ZIF-8) and results in improved porosity, permeability, and surface morphology. The integration of cellulose particles during membrane casting significantly altered the membrane pore structure, increasing the total pore area to 23% and air permeability to 1.32 cm<sup>3</sup>/cm<sup>2</sup>/s, while maintaining a uniform thickness of 62.5&#xa0;μm. Subsequent ZIF-8 functionalization further improved the surface properties. The introduction of cellulose particles not only improved the membrane porosity, but also facilitated more effective ZIF-8 integration, enhancing its stability and performance. These findings highlight the synergistic benefits of combining cellulose-based materials with metal–organic frameworks for the development of high-performance biodegradable membranes. This study underscores the potential of cellulose-based membranes for use in advanced separation technologies and sustainable filtration systems. By utilizing naturally abundant cellulose with rational surface modifications, this approach provides a scalable and environmentally friendly method for the development of next-generation membranes with tunable properties. The enhanced permeability and functional versatility of these membranes indicate their potential for further optimization in gas separation, water purification, and biofiltration, representing a significant advancement in sustainable membrane technology.</p> Graphical abstract <p></p>

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Functional enhancement of cellulose membranes using cellulose particles and ZIF-8 incorporation

  • 期刊论文

  • 发表日期：

    2026年2月20日

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  • Eun Hyup Kim,
  • Mingyeong Kim,
  • Doyeon Kim,
  • Hoik Lee

摘要

Abstract

Cellulose membranes are sustainable alternatives to synthetic polymer-based membranes because of their inherent biocompatibility, biodegradability, and eco-friendliness. However, their broader industrial use remains limited to applications such as water filtration, bioseparation, and gas separation, primarily because of their insufficient permeability, low porosity, and poor mechanical stability under practical operating conditions. This study presents a sustainable strategy for enhancing cellulose membranes by incorporating cellulose particles as chemically identical pore-forming agents. This enables effective surface functionalization with zeolitic imidazolate framework-8 (ZIF-8) and results in improved porosity, permeability, and surface morphology. The integration of cellulose particles during membrane casting significantly altered the membrane pore structure, increasing the total pore area to 23% and air permeability to 1.32 cm3/cm2/s, while maintaining a uniform thickness of 62.5 μm. Subsequent ZIF-8 functionalization further improved the surface properties. The introduction of cellulose particles not only improved the membrane porosity, but also facilitated more effective ZIF-8 integration, enhancing its stability and performance. These findings highlight the synergistic benefits of combining cellulose-based materials with metal–organic frameworks for the development of high-performance biodegradable membranes. This study underscores the potential of cellulose-based membranes for use in advanced separation technologies and sustainable filtration systems. By utilizing naturally abundant cellulose with rational surface modifications, this approach provides a scalable and environmentally friendly method for the development of next-generation membranes with tunable properties. The enhanced permeability and functional versatility of these membranes indicate their potential for further optimization in gas separation, water purification, and biofiltration, representing a significant advancement in sustainable membrane technology.

Graphical abstract