高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

直接MOF化诱导电活性高透气聚乳酸Janus纳纤滤膜

张龙1, 马良1, 徐超2, 吴洋2, 高娜2, 汪少振3, 李欣雨3, 王存民3, 徐  欢2, 张生辉2   

  1. 1. 湖北汽车工业学院, 汽车动力传动与电子控制湖北省重点实验室 2. 中国矿业大学, 材料与物理学院 3. 安全工程学院
  • 收稿日期:2025-07-31 修回日期:2025-09-06 出版日期:2025-09-16 发布日期:2025-09-16
  • 通讯作者: 张生辉 E-mail:zhangshenghui@cumt.edu.cn
  • 基金资助:
    国家重点研发计划(批准号：2024YFC3015003, 2023YFC3011704)、国家能源集团井工煤矿粉尘与职业病防治研究(六)煤矿粉尘防护装备研发项目(批准号：E210100285)、中国矿业大学研究生创新计划项目(批准号：2024WLKXJ140, 2024WLJCRCZL276, 2024WLKXJ143, 2024WLJCRCZL272, 2024WLJCRCZL195)和中央高校基本科研业务费专项资金(批准号：2024-10967, 2024-10958)资助

Highly Electroactive and Permeable Janus Filter Membranes by Direct MOF Functionalization of PLA Nanofibers

ZHANG Long1, MA Liang1, XU Chao2, WU Yang2, GAO Na2, WANG Shao-Zhen3, LI Xinyu3, WANG Cunmin3, XU Huan2, ZHANG Shenghui2   

  1. 1. Hubei Key Laboratory of Automotive Power Train and Electronic Control, School of Automobile Engineering, Hubei University of Automotive Technology 2. School of Materials Science and Physics 3. School of Safety Engineering, China University of Mining and Technology
  • Received:2025-07-31 Revised:2025-09-06 Online:2025-09-16 Published:2025-09-16
  • Contact: ZHANG Shenghui E-mail:zhangshenghui@cumt.edu.cn
  • Supported by:
    Supported by the National Key Research and Development Program, China(Nos.2024YFC3015003, 2023YFC3011704), the Key Science and Technology Program of CHN Energy Group, China(No.E21010028504), the China University of Mining and Technology Postgraduate Innovation Program Project(Nos.2024WLKXJ140, 2024WLJCRCZL276, 2024WLKXJ143, 2024WLJCRCZL272, 2024WLJCRCZL195) and the Fundamental Research Funds for the Central Universities, China(Nos.2024-10967, 2024-10958)

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摘要： 研发高性能的空气过滤材料在日益恶劣的空气环境中十分关键. 本研究通过微波辅助合成法高效可控制备出纳米晶MOF-801，随后利用“静电纺丝-喷雾”策略将MOF纳米晶锚定于聚乳酸纤维表面构筑出一种特殊的Janus结构. 高介电MOF纳米晶显著提高了聚乳酸纤维的驻极效果，给聚乳酸纤维膜带来了高介电常数（2.5）和初始表面电势（5.6 kV）等高电活性以及优异的电荷储存和再生能力. Janus结构具有多种过滤效应协同作用，可分级捕获不同粒径的PMs. 即使处于最高的气体流速下（85 L/min），J-PLA/MOF纤维膜也可达到超高PM0.3过滤效率（96.4%）以及低空气阻力（121.5 Pa）. 同时，在100 Pa压差测试条件下，相较Normal PLA的低透气性（102.2 mm/s），J-PLA/MOF纤维膜的气体透过速率最高可达225.1 mm/s. 由于适量高表面活性MOF纳米晶的锚定，J-PLA/MOF纤维膜的力学性能有所改善，其抗拉强度和杨氏模量分别高达4.7 MPa和100.3 MPa. 本研究设计的J-PLA/MOF可降解纤维膜在超细PMs过滤研究中具有广阔的应用前景.

关键词: 超细颗粒物, 聚乳酸纤维, MOF化, Janus结构, 透气性

Abstract: Developing high-performance air filtration materials is of great significance in the increasingly harsh air environment. In this study, nanocrystalline MOF-801 was efficiently and controllably prepared via microwave-assisted synthesis. Subsequently, an electrospinning-electrospray strategy was employed to anchor the MOF nanocrystals onto the surface of PLA fibers while designing a unique Janus structure. The high-dielectric MOF nanocrystals significantly enhanced the electret effect of PLA fibers, imparting high dielectric constant (2.5) and initial surface potential (5.6 kV) to the PLA fibrous membrane, along with excellent charge storage and regeneration capabilities. The Janus structure exhibits synergistic effects of multiple filtration mechanisms, enabling hierarchical capture of particulate matters (PMs) with different particle sizes. Even under the highest airflow rate (85 L/min), the J-PLA/MOF fibrous membrane achieved ultra-high PM0.3 filtration efficiency (96.4%) and low air resistance (121.5 Pa). Additionally, under a differential pressure of 100 Pa, compared to the low air permeability (102.2 mm/s) exhibited by Normal PLA, the air permeability rate of the J-PLA/MOF fibrous membrane could reach up to 225.1 mm/s. Due to the anchoring of an appropriate amount of highly surface-active MOF nanocrystals, the mechanical properties of the J-PLA/MOF fibrous membrane were improved, with tensile strength and Young's modulus reaching as high as 4.7 MPa and 100.3 MPa, respectively. The J-PLA/MOF biodegradable fibrous membranes designed in this study held great potential for applications in ultrafine PMs filtration.

Key words: Ultrafine particulate matters, Poly(lactic acid) fiber, Metal-organic framework functionalization, Janus structure, Air permeability

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