The new light-driven actuator can realize contactless actuation,with the advantages of fast response and programmability.Based on the N-isopropylacrylamide-based hydrogel with temperature-sensitive,porous and biocompatible characteristics,the second monomer acrylamide was added,and lithium magnesium silicate was introduced as a physical crosslinker agent to construct a double network temperature-sensitive hydrogel.The nanoscale liquid metal material was then introduced to prepare a temperature-sensitive hydrogel with high strength and toughness.Its photoresponse efficiency was tested by numerical simulation studies and photothermal experiments.The experiment showed that the introduction of nano-scale liquid metal could endow the temperature-sensitive hydrogel with light-driven property.The actuator developed based on this hydrogel could be driven by near-infrared laser,enabling the fabrication of soft robots with crawling behavior,which provided novel insights for the design of light-driven actuators.
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