Anti-freezing, water-retaining, conductive, and strain-sensitive hemicellulose/polypyrrole composite hydrogels for flexible sensors

High-performance conductive hydrogels are desired for the development of flexible wearable sensors. However, it remains a challenge to simultaneously realize high stretchable, freezing tolerance, and attractive conductivity through a simple approach. In this work, we present stretchable, water retention, anti-freezing, and conductive hemicellulose/polypyrrole (H/PPY) composite hydrogels for application in epidermal strain sensors via...