Tough, Healable, Photoresponsive Actuator Based on a Quadruple Hydrogen-Bond-Capped Slide-Ring Structure

摘要

A tough self-healing supramolecular photoresponsive actuator based on a 2-urea-4[1H]-pyrimidinone (UPy)-terminated host-guest slide-ring structure was designed. The supramolecular gel was revealed to be stretchable and tough. It achieved a tensile strength of 2.25 MPa with elongation at break of 533% and could lift beyond 900 times its own weight. Based on the special structure, its photoresponsive motion was as fast as 55 degrees within 40 s under 365 nm irradiation. The gel also showed highly efficient self-healable ability and quick responsivity to temperature and humidity.

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