Abstract
The unique feature of bi-stable structure is that it has the inherent ability to rapidly change between two stable configurations under external stimulations, and can maintain the equilibrium state without energy consumption. Herein, we reported a light-responsive bi-stable actuator which composed of functional and support layers. Firstly, the effect of oriented polyimide (PI) fiber-reinforced polydimethylsiloxane (PDMS) composites on thermal behavior was been studied. Then, this unique thermal performance of PI fiber-reinforced PDMS in combination with the laying method ensures the formation of a bi-stable actuator. Finally, a universal but straightforward strategy to generate a light-responsive actuator with fast deformation and bi-stable characteristics was developed based on photo-thermal expansion deformation mechanism. Moreover, the actuator was fabricated by using inexpensive materials and scalable methods. Overall we believe this work may open up a new perspective for the design of light-responsive actuators and enriches the design of fast-deformation flexible bi-stable actuators.
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