Abstract
Superhydrophobic actuators that are capable of moving on water surface under external stimuli has broad application prospects in various fields such as robots, environmental protection, sensors and freight transportation. However, the film actuators with soft materials as skeleton frames are easily deformed and destroyed when subjected to heavy loads, which severely restricts its further applications. Herein, we proposed a general and efficient strategy to fabricate a high-strength double-layer actuator composed of a metal/glass-based superhydrophobic substrate and a polymer superhydrophobic coating by combining the laser ablation and spraying techniques. The superhydrophobic coating not only possessed high adhesive strength with the ablated substrates, but also showed excellent self-cleaning, anti-ultraviolet irradiation and anti-stripping properties. Additionally, the addition of light and magnet response materials endowed the superhydrophobic coating with excellent photothermal and magnetic response properties, which supported the application of superhydrophobic actuators in different fields, such as freight collection and transportation.
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