Hydrogel-based Flexible Strain Sensor for Human Motion Detection
Under the rapid development of wearable electronic devices,it is a hotspot to develop a wearable flexible strain sensor which can be used to detect human movement.A conductive hydrogel-based flexible strain sensor is constructed based on polyacrylamide,cellulose nanocrystals,and tannic acid.The mechanical and electrical performance test results of this strain sensor show that compared with other flexible strain sensors polyacrylamide/cellulose nanocrystals/tannic acid conductive hydrogel-based flexible strain sensor has an ultra-long tensile range(0%-2 900%),better adhesion,fast response time(280 ms),and good stability(over 320 loading and unloading cycles).The sensor has good detection function for motion signals such as large strain of human joint bending and small strain of laryngeal movement,and can be used as a flexible wearable sensor for human motion detection.