高等学校化学学报 ›› 2025, Vol. 46 ›› Issue (3): 20240513.doi: 10.7503/cjcu20240513

• 高分子化学 • 上一篇    

面向高湿PMs滤除和无源生理监测的有机-无机纳米杂化电活性聚乳酸防护膜

徐明伟1, 杨尚学1, 刘冠林1, 杨婷2, 张一帆2, 赵越3, 李和国3, 张明明4, 徐欢2()   

  1. 1.北京石油化工学院安全工程学院,北京 102617
    2.中国矿业大学材料与物理学院,徐州 221116
    3.国民核生化灾害防护国家重点实验室,北京 100191
    4.中国安全生产科学研究院,北京 100012
  • 收稿日期:2024-11-18 出版日期:2025-03-10 发布日期:2024-12-25
  • 通讯作者: 徐欢 E-mail:hihuan@cumt.edu.cn
  • 基金资助:
    国家自然科学基金(52404195);国家重点研发计划项目(2024YFC3015003);北京市教育委员会科研计划项目(KM202310017002);国家能源集团科技攻关项目(E210100285)

Organic-inorganic Nanohybrid Electroactive Polylactic Acid Protective Membranes for High Humidity PMs Filtration and Passive Physiological Monitoring

XU Mingwei1, YANG Shangxue1, LIU Guanlin1, YANG Ting2, ZHANG Yifan2, ZHAO Yue3, LI Heguo3, ZHANG Mingming4, XU Huan2()   

  1. 1.School of Safety Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China
    2.School of Materials Science and Physics,China University of Mining and Technology,Xuzhou 221116,China
    3.State Key Laboratory of NBC Protection for Civilian,Beijing 100191,China
    4.China Academy of Safety Science and Technology,Beijing 100012,China
  • Received:2024-11-18 Online:2025-03-10 Published:2024-12-25
  • Contact: XU Huan E-mail:hihuan@cumt.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(52404195);the National Key Research and Development Program, China(2024YFC3015003);the Research and Development Program of Beijing Municipal Education Commission, China(KM202310017002);the Key Science and Technology Program of CHN Energy Group(E210100285)

摘要:

空气中细微颗粒物(PMs)和病毒能攻击人体呼吸系统, 导致呼吸功能受损. 尽管生物基可降解聚乳酸(PLA)纳米纤维膜在空气净化领域有显著前景, 但现有制备方法难以有效同时调控纤维微观结构、 膜形态和驻极体性能. 本文提出有机-无机纳米杂化复合协同提升策略, 采用静电纺丝PLA@TiO2和电喷雾咪唑酸分子筛框架-8(ZIF-8)纳米电介质相结合的技术路线制备了PLA@TiO2/ZIF-8(PLA@T/Z)纳米纤维膜, 大幅提升了PLA纳米纤维膜的电活性和表面活性, 其介电常数和表面电位分别可达3.47和8.5 kV. 在10 N和1 Hz接触-分离循环测试中, PLA@T/Z输出电压高达17.9 V, 而在仿人呼吸条件下输出电流为32.1 nA. 得益于优异的驻极特性和电荷再生能力, PLA@T/Z展现了超高的PM0.3过滤性能, 在空气流速为85 L/min时能滤除90.4%的 PM0.3, 而压降仅为175 Pa; 在相对环境湿度(RH)为90%时仍能滤除90.8%的PM0.3(空气流速为32 L/min). 有机-无机纳米杂化复合体系结构的设计拓展了PLA纳米纤维膜在空气净化和自供能呼吸监测等领域的应用前景.

关键词: 空气过滤, 聚乳酸, 纳纤防护膜, 有机-无机杂化复合体, 无源监测

Abstract:

Particulate matters(PMs) and viruses in the air can attack the human respiratory system, resulting in impaired respiratory function. Although biodegradable polylactic acid(PLA) nanofiber membranes have significant prospects in the field of air purification, the existing preparation methods are difficult to effectively regulate fiber microstructure, membrane morphology and electret properties at the same time. In this paper, a synergic enhancement strategy of organic-inorganic nanohybrid composite was proposed, that is, the electrical activity and surface activity of PLA nanofibrous membranes(PLA@T/Z) were greatly improved by combining electrospinning PLA@TiO2 and electrospray zeolite imidazolate framework-8(ZIF-8) nanodielectric. The dielectric constant and surface potential of PLA nanofibrous membranes(PLA@T/Z) could reach 3.47 kV and 8.5 kV respectively. In the 10 N and 1 Hz contact-separation cycle test, PLA@T/Z has an output voltage of 17.9 V, while in the simulated human breathing condition, the output current is 32.1 nA. Thanks to excellent electret characteristics and charge regeneration, PLA@T/Z exhibits superior PM0.3 filtration performance[90.4% of PM0.3 can be filtered at 85 L/min with a pressure drop of only 175 Pa and 90.8% of PM0.3(32 L/min air flow rate) can still be filtered at a relative humidity(RH) of 90%]. The design of organic-inorganic nanohybrid composite system expands the application prospect of PLA nanofiber membrane in the fields of air purification and self-energy respiration monitoring.

Key words: Air filtration, Polylactic acid, Nanofibrous protective membrane, Organic-inorganic hybrid composite system, Passive monitoring

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