Mechanically tough yet self-healing transparent conductive elastomers obtained using a synergic dual cross-linking strategy

Abstract

Simultaneously achieving transparency, high mechanical strength and self-healing capability in conductive elastomers with simple and green features is a challenge. Here we develop a novel strategy for a tough yet self-healing supramolecular network by introducing Al(III)-carboxyl complexes into photo-polymerizable deep eutectic solvent (PDES). The resulting polymer simultaneously exhibits high transparency, ionic conductivity, and high stretchability. Notably, due to synergetic interactions of the H-bonds and coordination bonds in the polymer matrix, the supramolecular network shows a high stress at break while achieving good self-healing capability. In view of the outstandingly comprehensive properties, we continue to verify the practicability of our prepared materials as strain sensors to monitor external stimuli such as human motions. Our methodology is simple, green and time-saving, and the fundamental design concept derived from the multifunctional PDES will contribute to the development of tough, self-healing transparent materials and flexible electronics.