Abstract
Photo-thermal responsive actuators are attracting increasing attention due to their good light source and wireless remote control. A Ketjen Black (KB)-based sandwich photo-thermal responsive actuator with low cost, simple preparation, and excellent performance was developed, which significantly improved the actuation performance compared to the bilayer ones, with an impressive actuation bending angle of 75°. Meanwhile, the effects of different carbon materials and structural parameters on actuation performance were discussed. The actuation performance of KB-based actuators can be close to that of the CNTs and GO-based actuators when with the sandwich structure. It was found that the optimal structure would be that of PI-PDMS- KB/PDMS. The actuation mechanism was further analyzed by the finite element method. The simulation results showed good conformity to the experiments, which presented the feasibility of predicting the film actuators' photo-thermal responsive performance. The potential of this photo-thermal responsive film actuator to be used in a breathable fabric, mechanical gripper, and bionics robot were also demonstrated.
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