文献类型：期刊文献

英文题名：Highly sensitive strain sensors based on fragmentized carbon nanotube/polydimethylsiloxane composites

作者：Gao, Yang[1];Fang, Xiaoliang[1];Tan, Jianping[1];Lu, Ting[2];Pan, Likun[2];Xuan, Fuzhen[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]East China Normal Univ, Sch Phys & Mat Sci, Shanghai Key Lab Magnet Resonance, Shanghai 200062, Peoples R China

年份：2018

卷号：29

期号：23

外文期刊名：NANOTECHNOLOGY

收录：;EI(收录号：20181705036998);WOS:【SCI-EXPANDED(收录号:WOS:000429875400001)】；

基金：This project is supported by National Natural Science Foundation of China (Grant No. 51705154), and Shanghai Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, and Fundamental Research Funds for the Central Universities (Project Nos. 222201714014, and 222201714017). This work is also financially sponsored by Shanghai Rising-Star Program (A type) (Grant No. 18QA1401300) and Shanghai Sailing Program 17YF1403300.

语种：英文

外文关键词：carbon nanotubes; flexible strain sensors; fragmentized CNT/PDMS composites; human health monitoring

摘要：Wearable strain sensors based on nanomaterial/elastomer composites have potential applications in flexible electronic skin, human motion detection, human-machine interfaces, etc. In this research, a type of high performance strain sensors has been developed using fragmentized carbon nanotube/polydimethylsiloxane (CNT/PDMS) composites. The CNT/PDMS composites were ground into fragments, and a liquid-induced densification method was used to fabricate the strain sensors. The strain sensors showed high sensitivity with gauge factors (GFs) larger than 200 and a broad strain detection range up to 80%, much higher than those strain sensors based on unfragmentized CNT/PDMS composites (GF < 1). The enhanced sensitivity of the strain sensors is ascribed to the sliding of individual fragmentized-CNT/PDMS-composite particles during mechanical deformation, which causes significant resistance change in the strain sensors. The strain sensors can differentiate mechanical stimuli and monitor various human body motions, such as bending of the fingers, human breathing, and blood pulsing.