Study of A Multiple Responses, High Deformation and Programmable PLA‐PPC/PVA‐PDA Actuator

Abstract

The intelligent response actuators based on bilayer polymer can deform under the stimulation of temperature, humidity, light and other external environment, which has been the focus of research. However, achieving multiple responses, high deformation and programmability is still one of the challenges for these actuators. Herein, a non‐detachable bilayer structure PLA‐PPC/PVA‐PDA (polylactic acid‐poly propylene carbonate/polyvinyl alcohol‐polydopamine) multi‐response programmable actuator was prepared by a simple scraping film method. Using PLA‐PPC as solvent‐driven response layer, the effects of length, thickness, shape and solvent vapor on the deformation of PLA‐PPC/PVA‐PDA actuators were studied. Among them, the high curvature of the film stimulated by ethyl acetate (EA) solution was 29.85 cm⁻¹. Using PVA‐PDA as the response layer to water molecules and infrared (IR) light, the bilayer film showed excellent curling performance. Moreover, the dynamic processes of human clothing and biomimetic squid under solvent stimulation, the picture rolling motion under water molecule stimulation, the biomimetic flower blooming and merging under the synergistic of water molecules and IR light, and deformation process of biomimetic mimosa under the competition between water molecules and IR light were simulated, which broadened the road for the development of intelligent driving materials.

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