Rapidly self-healing, highly adhesive, ionically conductive adhesives enabled by synergistic hydrogen bonding and...

In recent years, the demand for flexible electronics in areas such as wearable sensing and human-machine interface has surged dramatically. To enhance the stability and comfort of devices while prolonging their service life, self-adhesion and self-repair functionalities have emerged as crucial study areas in this domain. In this context, the study employed a one-step technique to create a double cross-linked network consisting of hydrogen bonds and coordination bonds, thereby successfully synthesizing a supramolecular polymer with a dynamic cross-linked network architecture. A high-performance ionic conductive adhesive was created based on this. This ionic conductive adhesive exhibited exceptional features. It exhibited a peel adhesion of up to 1126.61 ± 98.83 N/m, a high interfacial toughness of 1267.09 ± 117.22 J/m², and exceptional self-repair capabilities. Following a treatment at 80 °C for 1 h, the self-repair rate attained 93.02%. The dynamic cross-linked polymer network provided the adhesive with the capability for real-time electrical self-repair. Due to these exceptional qualities, the sensor can be directly affixed to the skin without any support, enabling high-precision sensing of human movements. This material holds significant engineering application value. In the field of wearable devices, it ensures stable adhesion between the device and the skin, thereby enhancing the stability and comfort during use.