Biodegradable Electroactive Nanofibrous Air Filters for Long-Term Respiratory Healthcare and Self-Powered Monitoring

IF 8.3 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Cunmin Wang, Xinyi Song, Tian Li, Xuanjin Zhu, Shugui Yang, Jintuo Zhu, Xinjian He*, Jiefeng Gao and Huan Xu*, 
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引用次数: 3

Abstract

The concept of triboelectric nanogenerator (TENG)-based fibrous air filters, in which the electroactive fibers are ready to enhance the electrostatic adsorption by sustainable energy harvesting, is appealing for long-term respiratory protection and in vivo real-time monitoring. This effort discloses a self-reinforcing electroactivity strategy to confer extreme alignment and refinement of the electrospun poly(lactic acid) (PLA) nanofibers, significantly facilitating formation of electroactive phases (i.e., β-phase and highly aligned chains and dipoles) and promotion of polarization and electret properties. It endowed the PLA nanofibrous membranes (NFMs) with largely increased surface potential and filtration performance, as exemplified by efficient removal of PM0.3 and PM2.5 (90.68 and 99.82%, respectively) even at the highest airflow capacity of 85 L/min. With high electroactivity and a well-controlled morphology, the PLA NFMs exhibited superior TENG properties triggered by regular respiratory vibrations, enabling 9.21-fold increase of surface potential (?1.43 kV) and nearly 68% increase of PM0.3 capturing (94.3%) compared to those of conventional PLA membranes. The remarkable TENG mechanisms were examined to elaborately monitor the personal respiration characteristics, particularly those triggered large and rapid variations of output voltages like coughing and tachypnea. Featuring desirable biocompatibility and degradability, the self-powered PLA NFMs permit promising applications in the fabrication of ecofriendly air filters toward high-performance purification and intelligent monitoring.

Abstract Image

可生物降解的电活性纳米纤维空气过滤器,用于长期呼吸保健和自供电监测
基于摩擦电纳米发电机(TENG)的纤维空气过滤器的概念是,电活性纤维可以通过可持续的能量收集来增强静电吸附,这对长期呼吸保护和体内实时监测具有吸引力。这项工作揭示了一种自我增强的电活性策略,赋予静电纺聚乳酸(PLA)纳米纤维极端的排列和细化,显著促进电活性相(即β相和高度排列的链和偶极子)的形成,并促进极化和驻极体性质。它使PLA纳米纤维膜(NFMs)的表面电位和过滤性能大大提高,即使在最高气流容量为85 L/min时,也能有效去除PM0.3和PM2.5(分别为90.68和99.82%)。与传统聚乳酸膜相比,聚乳酸膜具有高的电活性和良好的控制形态,表现出由常规呼吸振动触发的优异的TENG性能,使表面电位(1.43 kV)增加9.21倍,PM0.3捕获量增加近68%(94.3%)。研究人员检测了显著的TENG机制,以仔细监测个人呼吸特征,特别是那些触发输出电压大而快速变化的特征,如咳嗽和呼吸急促。具有理想的生物相容性和可降解性,自供电PLA nfm允许在制造环保空气过滤器方面有前景的应用,以实现高性能净化和智能监测。
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来源期刊
ACS Applied Materials & Interfaces
ACS Applied Materials & Interfaces 工程技术-材料科学:综合
CiteScore
16.00
自引率
6.30%
发文量
4978
审稿时长
1.8 months
期刊介绍: ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.
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