Multidynamic Synergistic Elastomers for Room-Temperature Self-Healing and Flexible Sensing

Inspired by the multilayered structure and dynamic bonds of bioskin, a polyurethane (PU)-based ion-conductive elastomer (CPU) was developed by incorporating multiple dynamic hydrogen bonds into a densely cross-linked network, using [EMIM][TFSI] ionic liquid as the conductive medium. The resulting material exhibits high strength (15.38 MPa), extreme stretchability (1194.18% elongation), autonomous room-temperature self-healing (>90% healing efficiency), and an ionic conductivity of 1.6 × 10^–4 S/cm. The ionic liquid enhances chain mobility and interfacial compatibility through ion–dipole interactions, while improving dynamic behavior and preventing leakage. Leveraging these properties, the CPU was successfully applied in flexible strain sensors for sensitive and stable human motion monitoring, demonstrating significant potential for wearable electronics and smart sensing applications.