文献类型：期刊文献

英文题名：Stretchable and Highly Sensitive Flexible Strain Sensor Based on a Three-Layer Core-Shell Structure of Polydopamine/Polypyrrole@Natural Rubber for Human Activity Monitoring

作者：Zhan, Ziwei[1];Yuan, Yizhong[1];Zhang, Yao[1];Tian, Xiaohui[1];Sun, Jinyu[1];Jin, Jie[2];Wu, Wangbao[2];Ayikanbaier, Kadier[3]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China;[2]Shanghai Engn Res Ctr Cards & Identificat Document, Shanghai 200063, Peoples R China;[3]Xinjiang Vocat & Tech Coll Commun, Coll Humanities & Basic Educ, Urumqi 831400, Peoples R China

年份：2024

卷号：26

期号：7

外文期刊名：ADVANCED ENGINEERING MATERIALS

收录：;EI(收录号：20240915655116);WOS:【SCI-EXPANDED(收录号:WOS:001173828500001)】；

基金：This work was financially supported by the Fundamental Research Funds for the Central Universities of China (grant no. 22A201514002).

语种：英文

外文关键词：natural rubber; polydopamine; polypyrrole; strain sensors

摘要：In recent years, flexible strain sensors with a wide detection range and high sensitivity have garnered significant attention for human health monitoring. However, fabricating strain sensors with a broad strain range while retaining high sensitivity remains a major challenge. Herein, a green and facile method is successfully developed to fabricate the polydopamine/polypyrrole@natural rubber (PDA/PPy@NR)-based strain sensor with a three-layer core-shell structure. PDA and PPy are coated uniformly onto the surface of the NR nanosphere by in situ polymerization. The electromechanical and strain sensing properties of the fabricated composite are investigated. The homogeneous coating of PPy and PDA layers has facilitated the formation of continuous conductive pathways within the NR matrix, even at low loading levels. Consequently, the strain sensor exhibits remarkable sensitivity over a wide strain range (approximate to 800%) and long-term reliability (2500 cycles at 50%). The PDA/PPy@NR strain sensor shows an exceptionally high gauge factor value (142.6) and a short response time (125 ms). Furthermore, this PDA/PPy@NR strain sensor can effectively detect and capture subtle and large human movements such as limb joints and facial movements as well as even distinguish the pronunciation of different words. The PDA/PPy@NR strain sensor holds great promise for integration into flexible wearable electronics. A convenient and effective solution blending has been developed for the preparation of highly sensitive and stretchable strain sensors with a conductive three-layer core-shell structure based on polydopamine/polypyrrole coated on natural rubber with a wide strain range (0%-800%) and high gauge factor value (142.6), which can effectively detect and capture subtle and large human movements.image (c) 2024 WILEY-VCH GmbH