Breathable Strain/Temperature Sensor Based on Fibrous Networks of Ionogels Capable of Monitoring Human Motion, Respiration, and Proximity

• DOI: 10.1021/acsami.1c16733
• Publication Date: 2021-10-23T15:40:02Z
• Authors: Jianwen Chen; Fei Wang; Guoxuan Zhu; Chengbao Wang; Xihua Cui; Man Xi; Xiaohua Chang; Yutian Zhu
• Keywords: Thermoplastic polyurethane; Electrospinning; Response time

Wearable strain and temperature sensors are desired for human-machine interfaces, health monitoring, human motion monitoring. Herein, the fibrous mat with aligned nanofibers of ionic liquid (IL)/thermoplastic polyurethane (TPU) ionogels is fabricated via an electrospinning technique. The resultant cut into a rectangle specimen electrodes loaded along direction perpendicular to nanofiber orientation design high-performance multimodal sensor based on conducting mechanism. As sensor, obtained exhibits wide working range (0-200%), fast response recovery (119 ms), low detection limit (0.1%), good reproducibility because reversible deformable conductive pathways sensor. Moreover, also excellent temperature-sensing behaviors, including monotonic thermal response, high sensitivity (2.75% °C-1), accuracy (0.1 °C), time (2.46 s), remarkable repeatability, attributable negative coefficient behavior IL/TPU mat. More interestingly, possesses breathability, which wearable electronics. Because these sensing capabilities in temperature, can not only monitor tiny large motions but detect respiration proximity, exhibiting enormous potential