“Crocodile skin” ultra-tough, rapidly self-recoverable, anti-dry, anti-freezing, MoS2-based ionic organohydrogel as pressure sensors

Hydrogel sensor has been widely researched for their flexibility and elasticity; however, its poor mechanical, anti-dry and anti-freezing properties hinder its application in wearable devices seriously. Herein, a flexible, ultra-tough, excellent self-recoverable, anti-dry and anti-freezing ionic EG/MoS 2 -PAAM-Fe 3+ organohydrogel was prepared by adding ethylene glycol to the MoS 2 -PAAM-Fe 3+ hydrogel using solvent exchange method. And due to the pyramid microstructures at the bottom, the “crocodile skin” gel sensor exhibited good pressure sensitivity (S = 0.06 kPa −1 ) and fast electrical response to monitoring human movements. The MoS 2 -based organohydrogel with comprehensive properties showed promising application potentials in the new generation of electronic materials and devices used at low temperatures.