{"title":"Core-shell porous LM/TPU fibers with tunable conductive properties for use as strain and pressure sensors","authors":"","doi":"10.1016/j.coco.2024.102075","DOIUrl":null,"url":null,"abstract":"<div><p>Flexible wearable sensors have attracted widespread attention in health monitoring, human-machine interaction, and biomedical applications. However, developing a <del>flexible</del> sensor that possesses high sensitivity, wide detection range, and matches the conductive material with the modulus of elasticity remains challenging. Here, we developed a coaxial wet spinning process to fabricate conductive fibers with a core-multi-hollow-shell structure, termed LHPTF. The shell comprises a hollow porous structure of TPU, while the core consists of gallium-based LM with excellent electrical conductivity. LHPTF fibers exhibit electrical conductivity of 8690 S cm<sup>−1</sup>, high flexibility, appropriate strength, and high elongation at break. The hollow porous structure of TPU fibers can be adjusted with various hollow diameters, thereby enabling the switching between stable conduction and strain sensing of conductive fibers. Due to the protection provided by TPU, LHPTF fibers exhibit good environmental durability and stability. We also demonstrate the application of these fibers in wearable sensors and stable conductor<del>.</del></p></div>","PeriodicalId":10533,"journal":{"name":"Composites Communications","volume":null,"pages":null},"PeriodicalIF":6.5000,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Composites Communications","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2452213924002663","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, COMPOSITES","Score":null,"Total":0}
引用次数: 0
Abstract
Flexible wearable sensors have attracted widespread attention in health monitoring, human-machine interaction, and biomedical applications. However, developing a flexible sensor that possesses high sensitivity, wide detection range, and matches the conductive material with the modulus of elasticity remains challenging. Here, we developed a coaxial wet spinning process to fabricate conductive fibers with a core-multi-hollow-shell structure, termed LHPTF. The shell comprises a hollow porous structure of TPU, while the core consists of gallium-based LM with excellent electrical conductivity. LHPTF fibers exhibit electrical conductivity of 8690 S cm−1, high flexibility, appropriate strength, and high elongation at break. The hollow porous structure of TPU fibers can be adjusted with various hollow diameters, thereby enabling the switching between stable conduction and strain sensing of conductive fibers. Due to the protection provided by TPU, LHPTF fibers exhibit good environmental durability and stability. We also demonstrate the application of these fibers in wearable sensors and stable conductor.
期刊介绍:
Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.