Hot solution strategy to prepare Zr-MOF/polyimide mixed matrix membranes for high-performance helium separation

IF 8.4 1区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science Pub Date : 2025-04-24 DOI:10.1016/j.memsci.2025.124137

Zheyan Zhang , Zhuo Yang , Shengwang Li , Libing Qian , Xiuling Chen , Guining Chen , Gongping Liu , Wanqin Jin

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引用次数: 0

Abstract

Polymer membranes demonstrate strong potential for helium recovery applications but typically encounter permeability-selectivity trade-off in He/CH₄ and He/N₂ separations. Mixed-matrix membranes (MMMs) incorporating metal-organic frameworks (MOFs), renowned for their exceptional permeability-selectivity combinations, offer a viable strategy to address this limitation. In this study, we introduced a hot solution strategy for MOF/6FAB MMMs (6FAB: 6FDA-mPDA/HAB (6:4); MOF: UiO-66-NH₂) that achieved helium separation performance transcending the 2016 upper bound. By implementing 80 °C rather than conventional room temperature fabrication, the thermally processed MMMs exhibited strengthened interfacial compatibility through enhanced O–H⋯N hydrogen bonding between 6FAB's hydroxyl groups and UiO-66-NH₂'s amine functionalities. The optimized compatibility facilitated unprecedented 40 wt% MOF loadings, yielding remarkable He/CH₄ selectivity (257.2) and He permeability (516 Barrer). These values represented 824 % and 116 % enhancement over the pristine 6FAB polyimide membrane, while maintaining operational stability. These results validated the efficacy of thermal processing in engineering defect-free, high-performance membranes for advanced gas separations.

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热溶液策略制备Zr-MOF/聚酰亚胺混合基膜用于高性能氦分离

聚合物膜具有很强的氦回收应用潜力，但在He/CH4和He/N2分离中通常会遇到渗透率和选择性的权衡。结合金属-有机框架（mof）的混合基质膜（MMMs）以其优异的渗透率-选择性组合而闻名，为解决这一限制提供了可行的策略。在本研究中，我们介绍了MOF/6FAB mm (6FAB: 6FDA-mPDA/HAB (6:4)；MOF: UiO-66-NH2)，实现了超越2016年上限的氦分离性能。通过实施80°C而不是传统的室温制造，通过增强6FAB的羟基和UiO-66-NH2的胺官能团之间的O-H⋯N氢键，热处理的mm表现出增强的界面相容性。优化后的相容性实现了前所未有的40 wt% MOF负载，产生了卓越的He/CH4选择性（257.2）和He渗透率（516 Barrer）。这些值分别比原始的6FAB聚酰亚胺膜提高了824%和116%，同时保持了操作稳定性。这些结果验证了热加工在工程上无缺陷的有效性，高性能膜用于先进的气体分离。

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来源期刊

Journal of Membrane Science 工程技术-高分子科学

CiteScore

17.10

自引率

17.90%

发文量

1031

审稿时长

2.5 months

期刊介绍： The Journal of Membrane Science is a publication that focuses on membrane systems and is aimed at academic and industrial chemists, chemical engineers, materials scientists, and membranologists. It publishes original research and reviews on various aspects of membrane transport, membrane formation/structure, fouling, module/process design, and processes/applications. The journal primarily focuses on the structure, function, and performance of non-biological membranes but also includes papers that relate to biological membranes. The Journal of Membrane Science publishes Full Text Papers, State-of-the-Art Reviews, Letters to the Editor, and Perspectives.