Photopolymerized ionogel as strain-temperature flexible sensor with high linearity, self-healing ability and adhesion

Ionogels have attracted significant interest as multifunctional flexible sensors owing to their ionic conductivity, flexibility, stability, and inherent conformability. However, the integration of multiple functions into an ionogels remains significantly challenging. Herein, via a one-step photopolymerization of a PIL in an IL solution, we synthesized multifunctional poly(ionic liquid) (PIL)/ionic liquid (IL) ionogels capable of detecting temperature and strain stimuli with minimal interference. The compatibility between PIL and IL imparts self-adhesive properties and rapid self-healing (82.4 % efficiency after 2 h). Furthermore, the PIL/IL sensor exhibited high response linearity for strain (0.987) and temperature (0.993), indicating that the temperature stimulus and the strain stimulus barely have influence on each other. These results demonstrate the potential of wearable electronic devices for human motion detection and temperature sensing.