Two different long-chain silanes,hexadecyltrimethoxysilane(HDTMS)and tridecylfluoroocty-ltriethoxysilane(PFTDS),were used to modify nano titanium dioxide(TiO2),and the modified TiO2 nanoparticles were in-situ polymerized with polysiloxane prepolymers to prepare composite coatings through a two-step spraying method.The dispersion of modified nanoparticles was significantly improved,and the corresponding composite coatings formed a uniformly distributed rough structure on the substrate.Only a 20%(mass fraction)loading of the modified TiO2 could make the composite coating exhibit superhydrophobicity,exhibiting excellent self-cleaning performance,corrosion resistance,and UV photocatalytic performance.The material had broad applications in fields such as construction,automobiles,and ships.
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