In this study,a mechanically stable superhydrophobic aluminum surface was successfully prepared.Firstly,nanosecond laser was used to ablate micron-scale structures on the aluminum surface,followed by the immersion of polystyrene(PS)and hydrophobic nano-sized SiO2 particles.Then a superhydrophobic aluminum surface was obtained.The study showed that the superhydrophobic surface had a multi-scale hierarchical morphology,with micron-scale protrusions of 100μm spacing within the micron-scale rough structure.The maximum contact angle(CA)of this superhydrophobic surface was 160°,with a sliding angle(SA)of less than 5°.And after the wear test,it remained hydrophobic after 50 times of wear.Compared to superhydrophobic samples without micron-scale structures,it exhibited excellent wear-resistance,confirming the important role of micron-scale structures in protecting the nano-sized hydrophobic particles.This study provided a framework for preparing mechanically robust superhydrophobic surfaces with multiple structures,offering new ideas for the fabrication of mechanically stable superhydrophobic surfaces.
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