Alginate-polyacrylamide double-network hydrogel sensors: Biomass-based piezoresistive platform with liquid metal and
1The Faculty of Printing, Packaging Engineering and Digital Media Technology, Xi'an University of Technology, Xi'an 710048, China.
Abstract:
The hydrogel sensors with outstanding tensile strength, high sensitivity, broad sensing range and excellent stability are highly desired for flexible electronics. Here, a double network piezoresistive flexible hydrogel sensor equipped with a convex structure was fabricated using the template method, which consists of CMCNTs-PAM/SA-Ca2+ convex array and ultra-high-conductivity liquid metal droplets (LMs). Such a novel hybrid architecture enables the prepared piezoresistive sensor to have high sensitivity (GF up to 32.42), fast response time (209 ms), good cyclic stability (ultra 2000 cyclic tensile), and excellent strength. Due to its good comprehensive monitoring performance, the double network hydrogel sensor can be used for human activity monitoring, providing a tremendous potential in electronic wearable devices.
