Healable green hydrogen bonded networks for circuit repair, wearable sensor and flexible electronic devices

Healable materials have wide applications, especially in flexible electronics. Developing healable materials with green preparations, manipulations and post-processes, and moderate healing conditions is still a challenge. Here, inspired by natural healing phenomena based on hydrogen bonding interaction, a green hydrogen bonded network (GHBN), which means a hydrogel consisted of eco-friendly materials and connected by hydrogen bonding interaction, that is healable, reshapable, injectable, conductive, renewable, cost-effective and eco-friendly, is fabricated using amylopectin/water as skeleton and free-moved ions as current carrier. This ternary GHBN can fast heal in both mechanical and electrical field at room temperature. The healing process just costs 2-3 s without any specific environments, and the healing efficiency reaches 98%. The mechanisms of hydrogen bonded network and the healing process are well studied by computational simulations. GHBN exhibits excellent performance in circuit repair, wearable sensor and flexible electronic device. This work provides a new strategy to develop electrode materials using natural hydrogen bonded molecules as skeleton and apply into flexible electronics.