文献类型：期刊文献

英文题名：A stretchable conductive elastomer sensor with self-healing and highly linear strain for human movement detection and pressure response

作者：Zhang, Yao[1];Yuan, Yizhong[1];Yu, Huimei[2];Cai, Chunhua[3];Sun, Jinyu[1];Tian, Xiaohui[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ,Sch Mat Sci & En, Shanghai 200237, Peoples R China

年份：2024

卷号：11

期号：16

起止页码：3911

外文期刊名：MATERIALS HORIZONS

收录：;EI(收录号：20242416238156);WOS:【SCI-EXPANDED(收录号:WOS:001238938700001)】；

基金：This work was supported by the National Natural Science Foundation of China (52073095) and the Program of Shanghai Academic Research Leader (23XD1420900).

语种：英文

外文关键词：Aniline - Hydrogen bonds - Motion analysis - Polyaniline - Polymerization - Self-healing materials - Signal analysis

摘要：Expanding the detection information of wearable smart devices in applications has practical implications for their use in daily life and healthcare. Damage and breakage caused by mechanical injuries and continuous use are unavoidable for polymer matrices so self-healing properties are expected to be conferred on flexible sensors to extend their life and durability. In addition, a good linearity of relative resistance change vs. strain (gauge factor, GF) facilitates the streamlined conversion of electrical signals to 3D information of human motion, whereas existing works on sensors neglect the quantitative analysis of signals. This letter reports a self-healable flexible electronic sensor based on hydrogen bonding and electrostatic interaction between maleic acid-grafted natural rubber (MNR), polyaniline (PANI), and phytic acid (PA). MNR is the flexible matrix and the template for aniline (ANI) polymerization, and PA acts as the dopant and crosslinking agent. The MNR-PANI-PA sensor shows easy self-healing at room temperature, enhanced mechanical behaviour (similar to 2.5 MPa, 1000% strain), and excellent linearity (GF of 13.8 over 250% strain and GF of 32.0 over 250-100% strain). Due to the highly linear relationship between Delta R/R and bending angle, the electrical signals of human limb movement can output relevant information on bending angle and frequency. By constructing a sensing array, changes in the position and magnitude of applied pressure could also be detected in real-time. Based on these advantages, the MNR-PANI-PA composite sensor is expected to have potential applications in health monitoring, body motion detection, and electronic skins. A self-healable conductive elastomer sensor with highly linear strain to accurately monitor real-time 3D human motion information and sense pressure.