Ion-conductive hydrogel sensor prepared with alginate crosslinker for wide-range motion and temperature monitoring.

Flexible wearable electronic devices have gained widespread attention due to their comfort and real-time information transmission capabilities. However, they often exhibit poor stretchability, low sensitivity, and limited functionality, which restricts their practical applications. Herein, a conductive hydrogel (PNAL, a polymer synthesized from polyvinyl alcohol, nipaam, acrylic acid, and lithium chloride) that responds to both strain and temperature simultaneously was developed using a natural polysaccharide composite (SA-AGE) synthesized from sodium alginate (SA) and allyl glycidyl ether (AGE) as a crosslinking agent.