Highly adhesive chitosan/poly(vinyl alcohol) hydrogels via the synergy of phytic acid and boric acid and their application as highly sensitive and widely linear strain sensors

Chitosan/poly(vinyl alcohol) hydrogels with high adhesion of up to 527 kPa due to the synergy of phytic acid and boric acid. The hydrogel-based strain sensor has high sensitivity (gauge factor = 4.61) and wide linear strain range (up to 1000%).