A stretchable and adhesive ionic conductor based on polyacrylic acid and deep eutectic solvents

Abstract Hydrogels are a widely used ionic conductor in on-skin electronic and iontronic devices. However, hydrogels dehydrate the open air freeze at low temperatures, limiting their real applications when they attached on skin or exposed to temperatures. Polymer-ionic liquid gels can overcome these two obstacles, but synthetic liquids expensive toxic. In this work, we present an based polyacrylic acid (PAAc) deep eutectic solvents (DESs) that well addresses aforementioned challenges. We polymerize acrylic DESs get PAAc–DES gel, which exhibits excellent stretchability (> 1000%), high electrical conductivity (1.26 mS cm −1 ), adhesion (~ 100 N m as good anti-drying anti-freezing properties. also demonstrate PAAc-DES gel be electrode record surface electromyographic signal with quality, transparent stretchable devices work –20 °C. believe ideal candidate epidermal electrodes electrodes.