posted on 2021-03-10, 19:35authored bySiqi Chen, Yongjie Dong, Song Ma, Jiayuan Ren, Xipeng Yang, Yingjie Wang, Shaoyu Lü
The arrival of the era of artificial
intelligence is constantly
advancing the development of flexible electronic materials. However,
low mechanical properties, nonflexible signal transmission, and insensitive
signal output have restricted their development as sensors. In this
study, a superstretching MXene composite conductive hydrogel was developed
with a tensile strain of more than 1800%. The hydrogel was used as
a flexible wearable sensor to detect human motion signals in real
time. High sensitivity was achieved using the sensor to discern multidirectional
human motions, such as bending of human joints, throat vocalization,
swallowing, and pulse beat. In addition, rapid resilience was observed
for the MXene composite hydrogel after unloading reverse compressive
stress, which can quickly cause a specific current response in the
micropressure area without leaving any traces. This thixotropic sensor
achieves a rapid response to bidirectional stress and has huge application
prospects in the field of human body motion detection and national
defense information encryption.