Self-healing Strain Sensors Based on Nanostructured Supramolecular Conductive Elastomers
Self-healing ability is an important feature of animal skin, which is highly desirable for next-generation wearable devices. However, the preparation of a material combining self-healing ability, strain- and tactile-sensitivity, as well as good mechanical properties remains a great challenge. Herein, a new family of self-healing strain sensors from commercially available elastomers has been developed by the construction of a hierarchical nanostructure connected through thermal-reversible ionic hydrogen bonds. The resulting materials show high mechanical strength (~4-8 times of previously reported self-healing conductive materials), appealing strain sensitivity and excellent self-healing property. The healed samples maintain similar sensitivity for human motion monitoring even after bending over 10000 times. This work opens up new opportunities for the design and scalable fabrication of self-healing materials and future wearable sensing devices.