高等学校化学学报 ›› 2025, Vol. 46 ›› Issue (2): 20240426.doi: 10.7503/cjcu20240426

• 高分子化学 • 上一篇    下一篇

PLA/ZIF-8-NS纳米纤维膜的制备及高效滤除超细颗粒物性能

王圣程1, 王存民2, 郝雅馨2, 朱桂英3, 李欣雨2, 宋欣译2, 张明明4, 徐欢3, 何新建2()   

  1. 1.徐州工程学院土木工程学院, 徐州 221018
    2.中国矿业大学安全工程学院, 徐州 221116
    3.中国矿业大学材料与物理学院, 徐州 221116
    4.中国安全生产科学研究院, 北京 100012
  • 收稿日期:2024-09-14 出版日期:2025-02-10 发布日期:2024-11-25
  • 通讯作者: 何新建 E-mail:xinjian.he@cumt.edu.cn
  • 基金资助:
    国家自然科学基金(52174222);国家重点研发计划项目(2023YFC3011704);中国矿业大学研究 生创新计划项目(2024WLKXJ143);中央高校基本科研业务费专项资金(2024-10958);江苏省研究生科研与实践创新计划项目(批准号(KYCX24_2917);SJCX24_1047, KYCX24_2914, KYCX24_2937)资助

ZIF-8 Nanosheet-functionalized Poly(lactic acid) Nanofibrous Membranes for Efficient Filtration of Ultrafine Particles

WANG Shengcheng1, WANG Cunmin2, HAO Yaxin2, ZHU Guiying3, LI Xinyu2, SONG Xinyi2, ZHANG Mingming4, XU Huan3, HE Xinjian2()   

  1. 1.School of Civil Engineering,Xuzhou University of Technology,Xuzhou 221018,China
    2.School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China
    3.School of Materials Science and Physics,China University of Mining and Technology,Xuzhou 221116,China
    4.China Academy of Safety Science and Technology,Beijing 100012,China
  • Received:2024-09-14 Online:2025-02-10 Published:2024-11-25
  • Contact: HE Xinjian E-mail:xinjian.he@cumt.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(52174222);the National Key Research and Development

摘要:

通过微波辅助法制备了具有高比表面积的咪唑酸分子筛框架-8(ZIF-8)纳米片(ZIF-8-NS), 并将其作为纳米电介质均匀分散到聚乳酸(PLA)溶液中, 通过静电纺丝技术制备了ZIF-8-NS功能化PLA(PLA/ZIF-8-NS)纳米纤维膜; 研究了PLA/ZIF-8-NS纳米纤维膜的微观结构及性能. 结果表明, ZIF-8-NS的加入使PLA/ZIF-8-NS纤维明显细化(平均直径253 nm), 且纤维表面粗糙度提升; PLA/ZIF-8-NS纳米纤维膜的表面电位达到10.4 kV, 介电常数达到2.71, 表现出优异的电荷存储能力; PLA/ZIF-8-NS纳米纤维膜对颗粒物的滤除性能优异, 在 85 L/min的高空气流速下对PM0.3和PM0.3~2.5的过滤效率分别达到95.57%和99.95%, 空气阻力为305.3 Pa, 且过滤360 min后对PM0.3仍能保持98.50%的高过滤效率; PLA/ZIF-8-NS纳米纤维膜还具有优异的抗菌性能, 对金黄色葡萄球菌的抑菌率达到99.9%. 研究结果表明, PLA/ZIF-8-NS纳米纤维膜在实现长效低阻颗粒物滤除方面具有巨大潜力, 能够为高尘环境作业人员的呼吸健康防护提供重要保障.

关键词: 聚乳酸, 纳米纤维膜, 咪唑酸分子筛框架-8纳米片, 界面极化, 长效过滤

Abstract:

Zeolite imidazolate framework-8(ZIF-8) nanosheets(ZIF-8-NS) with high specific surface area were prepared by micro-assisted synthesis method, and uniformly dispersed into poly(lactic acid)(PLA) solution as nano-dielectrics, then ZIF-8-NS-functionalized PLA(PLA/ZIF-8-NS) nanofibers were prepared by electrospinning to improve the filtration efficiency and to achieve the long-lasting respiratory protection for the operators. The microstructure and properties of the prepared PLA/ZIF-8-NS nanofibrous membranes were investigated. It was found that the addition of ZIF-8-NS resulted in a significant refinement of PLA/ZIF-8-NS fibers(253 nm) and an increase in fiber surface roughness. The surface potential of PLA/ZIF-8-NS nanofibrous membrane reached 10.4 kV and the dielectric constant reached 2.71, demonstrating excellent charge storage capability. At the same time, the PLA/ZIF-8-NS nanofibrous membrane was given excellent filtration performance for ultrafine particles, and the filtration efficiency for PM0.3 and PM0.3—2.5 reached 95.57% and 99.95% respectively under the high air flow rate of 85 L/min, with an air resistance of 305.3 Pa, and the filtration efficiency for PM0.3 still maintained at a high level of 98.50% after 360 min of filtration. In addition, the PLA/ZIF-8-NS nanofibrous membrane exhibited superior antimicrobial properties, with an inhibition rate of 99.9% against Staphylococcus aureus. These results indicate that PLA/ZIF-8-NS nanofibrous membranes have great potential to achieve long-term filtration and low resistance to ultrafine particles, which can provide an important safeguard for respiratory health protection of personnel operating in high dust concentration environment.

Key words: Poly(lactic acid), Nanofibrous membrane, Zeolite imidazolate framework-8 nanosheets, Interface polarization, Long-term filtration

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