Bioinspired tree-like electroactive poly(lactic acid) nanofibers with enhanced surface activity and interfacial polarization for intelligent health management
{"title":"Bioinspired tree-like electroactive poly(lactic acid) nanofibers with enhanced surface activity and interfacial polarization for intelligent health management","authors":"Mengyuan Shen, Jiaqi Li, Lv Ke, Yifan Zhang, Guiying Zhu, Xiang Li, Jia-Qiong Li, Jiang Shao, Xinjian He, Mingming Zhang, Huan Xu","doi":"10.1016/j.seppur.2024.131065","DOIUrl":null,"url":null,"abstract":"Poly(lactic acid) (PLA)-based nanofibrous membranes (NFMs) have significant potential for use in biodegradable filters for air purification, but their application is often limited by relatively poor electret properties. Herein, tree-inspired gradient PLA (TG-PLA) nanofibers with biomimetic surfaces and remarkable electroactivity were fabricated by coaxial electrospinning of a unique core–shell structure. Importantly, the bioinspired structure conferred dramatic increase of dielectric constant for TG-PLA NFMs by 218 %, as well as enhanced in situ electret properties (over 3-fold rise of surface potential). The well-controlled morphological features and increased electroactivity contributed synergistically to distinct promotion of active PM-capturing performance, as exemplified by 99.25 % filtration of PM<sub>0.3</sub> at the airflow velocity of 32 L/min for TG-PLA2, largely surpassing the counterpart (only 89.63 %). Benefiting from the significantly increased electroactivity, TG-PLA2 exhibited superior energy harvesting performance and long-term stability (output voltage of 44.7 V, over 2000-second cycle test). Furthermore, a convolutional neural network (CNN) algorithm was developed to establish an intelligent respiratory recognition system, demonstrating high-accuracy diagnosis of multiple complex scenarios. The exceptional promotion in the surface activity and intrinsic electroactivity for PLA nanofibers is of enormous potential for environmental applications. Our bioinspired strategy can lead to a versatile platform that integrates with profound property improvements and scale-up feasibility for intelligent protective membranes.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":"35 1","pages":""},"PeriodicalIF":8.1000,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Separation and Purification Technology","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1016/j.seppur.2024.131065","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Poly(lactic acid) (PLA)-based nanofibrous membranes (NFMs) have significant potential for use in biodegradable filters for air purification, but their application is often limited by relatively poor electret properties. Herein, tree-inspired gradient PLA (TG-PLA) nanofibers with biomimetic surfaces and remarkable electroactivity were fabricated by coaxial electrospinning of a unique core–shell structure. Importantly, the bioinspired structure conferred dramatic increase of dielectric constant for TG-PLA NFMs by 218 %, as well as enhanced in situ electret properties (over 3-fold rise of surface potential). The well-controlled morphological features and increased electroactivity contributed synergistically to distinct promotion of active PM-capturing performance, as exemplified by 99.25 % filtration of PM0.3 at the airflow velocity of 32 L/min for TG-PLA2, largely surpassing the counterpart (only 89.63 %). Benefiting from the significantly increased electroactivity, TG-PLA2 exhibited superior energy harvesting performance and long-term stability (output voltage of 44.7 V, over 2000-second cycle test). Furthermore, a convolutional neural network (CNN) algorithm was developed to establish an intelligent respiratory recognition system, demonstrating high-accuracy diagnosis of multiple complex scenarios. The exceptional promotion in the surface activity and intrinsic electroactivity for PLA nanofibers is of enormous potential for environmental applications. Our bioinspired strategy can lead to a versatile platform that integrates with profound property improvements and scale-up feasibility for intelligent protective membranes.
期刊介绍:
Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.