Abstract
Super-hydrophobic films with vinyl-modified silica nanoparticles (V-SiO x-NPs) were successfully prepared. The rough surface, which was composed of microstructures of disordered V-SiO x-NPs and nanostructures on the surface of V-SiO x-NPs, rather than the chemical composition devoted to the super-hydrophobicity of film. The relationship between contact angle and diameter of V-SiO x-NPs was then investigated. The sessile contact angles (CA) of films with 150–1600 nm V-SiO x-NPs were around 166° regardless the diameter, while the film with 85 nm V-SiO x-NPs had the lowest CA of about 158°. The packing manner of V-SiO x-NPs determined the air fraction on the surface and then the CA.
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