基于MOF改性的超细聚乳酸纤维过滤性能强化及其智能监测应用

吕英华; 陈雨阳; 王存民; 李欣雨; 朱桂英; 张明明; 朱金佗; 徐欢

基于MOF改性的超细聚乳酸纤维过滤性能强化及其智能监测应用

1.
国能神东煤炭集团有限责任公司, 榆林 719315
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

基金项目: 国家自然科学基金(52003292；52174222)；国家重点研发计划(2023YFC3011704)；江苏省自然科学基金(BK20200661)；国家能源集团十大重点科技攻关项目(E210100285)

详细信息

通讯作者:
徐欢，博士，副教授，硕士生导师，研究方向为安全防护材料　E-mail: hihuan@cumt.edu.cn

中图分类号: X513；TB332
计量
- 文章访问数: 49
- HTML全文浏览量: 27
- 被引次数: 0
出版历程
- 收稿日期: 2024-07-02
- 修回日期: 2024-08-14
- 录用日期: 2024-08-17
- 网络出版日期: 2024-09-05

Enhanced air filtration performance and intelligent monitoring by MOF-functionalized ultrafine poly(lactic acid) fibers

1.
Shendong Coal Group Co., Ltd, CHN Energy Group, Yulin 719315, 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

Funds: National Natural Science Foundation of China (52003292, 52174222); National Key R&D Program (2023YFC3011704); Natural Science Foundation of Jiangsu Province (BK20200661); Key Science and Technology Program of CHN Energy Group (E210100285)

摘要

摘要: 在工业和医疗场所，传统不可降解过滤材料的大量使用已造成巨大生态环境压力。为此，研究和发展聚乳酸(PLA)纤维膜已成为前沿热点。在此基础上，提出利用同轴静电纺丝技术将高介电性能金属有机框架材料(MOF)嵌入纤维的表面工程策略，制备了用于呼吸防护装备的驻极效果优异、高电活性、可完全降解的聚乳酸纳米纤维膜，同时实现高效过滤和呼吸状态监测。通过调控纤维形貌和改善电活性，提高纤维的物理拦截和静电吸附能力，提升对颗粒物的过滤效率，多种表征测试结果表明：纤维平均直径降低33%(304 nm)，表面电势提高38% (1.8 kV)，介电常数提高55% (1.7)，输出电压提高74% (87 V)，对PM_0.3的过滤效率高达99.65% (32 L/min)，即使在85 L/min的高流量下过滤效率也在99.30%，且无显著衰减。在呼吸防护的基础上集成传感功能，可实现对人呼吸状态的实时监测，为疾病的早期诊断提供了参考，在个体防护领域有广阔的应用前景。
- 气溶胶过滤 /
- 纳米纤维膜 /
- 电活性 /
- 呼吸防护 /
- 呼吸监测
Abstract: The extensive use of traditional non-biodegradable filtration materials in industrial and medical sites has caused tremendous ecological and environmental pressure. For this reason, the research and development of poly(lactic acid) (PLA) fibrous membranes have become a cutting-edge hotspot. Based on this, the surface engineering strategy of using coaxial electrostatic spinning to embed high dielectric performance metal-organic framework (MOF) materials into fibers is proposed to prepare PLA nanofibrous membranes with excellent electronegativity, high electroactivity, and complete degradability for respiratory protection equipment, which can simultaneously achieve high-efficiency filtration and respiratory status monitoring. By regulating the fiber morphology and improving the electroactivity, the physical interception and electrostatic adsorption ability of the fibers were improved to enhance the filtration efficiency of particulate matter. The results of multiple characterization tests showed that the average fiber diameter was reduced by 33% (304 nm), the surface potential was increased by 38% (1.8 kV), the dielectric constant was increased by 55% (1.7), and the output voltage was increased by 74% (87 V). The filtration efficiency for PM_0.3 is up to 99.65% (32 L/min), and even at a high flow rate of 85 L/min, the filtration efficiency is still at 99.30% with no significant attenuation. Integrating the sensing function based on respiratory protection can realize the real-time monitoring of human respiratory status, which provides a reference for the early diagnosis of diseases and has a broad application prospect in the field of personal protection.
- aerosol filtration /
- nanofibrous membrane /
- electroactivity /
- respiratory protection /
- respiratory monitoring

HTML全文

图 1 聚乳酸(PLA)/MIL-88A纳米纤维膜制备流程和自主搭建的空气过滤性能测试装置

Figure 1. Preparation process of poly(lactic acid) (PLA)/MIL-88A nanofiber membranes and homemade air filtration test equipment

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图 2 PLA/MIL-88A纳米纤维膜扫描电子显微镜(SEM)图像及纤维直径分布

Figure 2. Scanning electron microscope (SEM) images and diameter distributions of PLA/MIL-88A nanofibrous membranes

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图 3 PLA/MIL-88A纳米纤维膜傅里叶变换红外光谱(FTIR)图

Figure 3. Fourier transform infrared spectroscopy (FTIR) images of PLA/MIL-88A nanofiber membranes

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图 4 PLA/MIL-88A纳米纤维膜表面电势和介电常数

Figure 4. Surface potential and dielectric constant of PLA/MIL-88A nanofiber membranes

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图 5 PLA/MIL-88A纳米纤维膜组装的摩擦纳米发电机示意及其输出电压

Figure 5. Schematic of triboelectric nanogenerator assembled with PLA/MIL-88A nanofiber membranes and their voltage output

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图 6 PLA/MIL-88A纳米纤维膜的PM_0.3过滤性能评价。(a-d)过滤效率和压降、(e)品质因子、(f)与已报道的纤维滤料的PM_0.3过滤性能对比

Figure 6. Filtration efficiency evaluation for PM_0.3 of PLA/MIL-88A nanofiber membranes. (a-d) Filtration efficiency, (e) Quality factor, (f) Comparison of PM_0.3 filtration efficiency with other existing fibrous filter

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图 7 PLA/MIL-88A纳米纤维膜用于呼吸状态监测

Figure 7. PLA/MIL-88A nanofiber membrane for respiratory rate monitoring

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