High stretchable and self-adhesive dual networks ionic gels and flexible devices application

Abstract

Multifunctional conductive hydrogels with high stretching and adhesion strength have been developed in recent years. However, rapilied formed, high toughness and self-adhesive ionic gels need further study. In this paper, highly tensile and tough ionic gels were prepared in DMAA-AMPS ionic liquid, and PEG600DA was used as a physical cross-linking agent by rapid UV polymerization. Excellent mechanical properties and self-adhesive properties to various substrates were integrated into the ionic gel hydrogels. The addition of PEG600DA contribute to high extension, up to 4100% and high toughness of 3163.0161 kJ/m3. For application, ionic gel is assembled to a cell with one layer of zinc and copper sheet. The output voltage of inonic gel is up to 0.15 V and convert from chemical energy to electrical energy. When ten cells are combined, a maximum voltage of 1.76 V can be achieved, which can provide energy for a stopwatch and can be used as a self-powered strain sensor under harsh conditions. The proposed ion-gel self-powered sensor has potential applications in electronic skin, human-computer interaction, and biomedical fields.