Healable Dielectric Elastomer Actuator With Premature Breakdown Warning Function for Information Transmission Encryption and Human‐Machine Interaction

Abstract Dielectric elastomer actuators (DEAs), regarded as artificial muscles, are used as actuators or sensors in artificial visual systems, haptic equipment, and human‐robot interaction. However, their inherent vulnerability related to mechanical damage and electrical breakdown seriously limits their safe and long‐term service. Herein, a healable dielectric elastomer (PHT‐ZnS:Cu) is acquired for premature breakdown warning by synthesising a healable poly(dimethylsiloxane) based on reversible imine bonding and hydrogen bonding and subsequent incorporation of electroluminescent ZnS:Cu particles. Moreover, LiTFSI ionic liquids are introduced into the healable poly(dimethylsiloxane) to prepare a transparent healable compliant electrode (PHT‐IL) that does not obscure the light emission of PHT‐ZnS:Cu dielectric elastomer. Then, an integral healable DEA (ISDEA) with an excellent interfacial interaction is constructed by coating two sides of PHT‐ZnS:Cu with PHT‐IL. The optimized ISDEA displays an actuated strain of 17.0% at 15 kV mm −1 with a healing efficiency of 91.9%. The integrated ISDEAs are used as soft anti‐counterfeiting labels and soft intelligent keyboards for information transmission, encryption, and human‐machine interaction, showing prospective applications in the realm of data leakage prevention and personal privacy protection.