Sodium Carboxymethyl Cellulose/Polypyrrole Nanoparticle-doped Conductive Hydrogel for Self-powered Flexible Strain Sensors and Signal Transmission

Conductive hydrogels, with their excellent flexibility and tunable electrical conductivity, have shown broad application prospects in emerging fields such as flexible strain sensors and triboelectric nanogenerators (TENG). In this study, a conductive sodium carboxymethyl cellulose (CMC)/ polypyrrole (PPy)/polyacrylamide (PAM)(CPA) hydrogel was developed by integrating a CMC/PPy composite, synthesized via in situ polymerization, into a hydrophobic-associated polyacrylamide network. This hydrogel exhibits excellent mechanical properties, with a tensile strain as high as 1735%, demonstrating extremely high ductility and deformation capacity. The flexible sensor based on CPA hydrogel has a wide detection range (0%–500%) and can monitor the movements of various parts of the human body. In addition, the TENG assembled based on CPA hydrogel achieves stable electrical output performance, enabling it to power small wearable electronic devices and promote self-powered signal transmission, showing broad application prospects in the fields of intelligent human-machine interaction and wearable electronics. The alternative text for this image may have been generated using AI.