Self-Healing Flexible Pressure Sensor for Human Motion Detection Based on Silver-Nanoparticle-Modified Polyimide Membranes

• DOI: 10.1021/acsapm.3c00498
• Publication Date: 2023-07-26T21:17:24Z
• Authors: Xiaolong Sun; Qingqing He; Yue Hou; Xuan Zheng; Peng Bi; Yufeng Xu; Xingzhong Zhang; Yong Liu; Rui Xiong; Yang Yang; Ziyu Wang

Polyimide (PI) nanofibers are highly suitable for applications in wearable electronic devices due to their excellent mechanical flexibility and good durability. Herein, a low-cost, self-healing flexible pressure sensor (PI@Ag) is demonstrated that based on silver-nanoparticle-modified polyimide. Uniformly distributed Ag nanoparticles form three-dimensional conductive network the nanofiber, which imparts with high sensitivity (197 kPa–1), wide response range (100 Pa–50 kPa), fast time (400 ms), low operating voltage (0.02 V), durability (loading/unloading test of 2000 cycles under 10 kPa). Moreover, encapsulating material can protect inner sensing when surface damaged, thereby ensuring integrity sensor. The prepared PI@Ag sensors demonstrate ability monitor an entire motions they attached human body. Furthermore, equipping wireless Bluetooth connectivity enables users transmit messages via Morse code. expected be widely used motion monitoring, disease diagnosis, human–machine interaction.