LAUSR

Abstract Superamphiphobic surface has broad applications in anti-fouling, self-cleaning, and anti-corrosion. A superamphiphobic fluorinated silica (F-SiO2) sol with a core-shell structure was prepared by the sol-gel method through two steps: first, pristine silica particles with a diameter of ca. 100 nm was synthesized by hydrolyzing tetraethyl orthosilicate (TEOS), using ethanol as the solvent and NH3·H2O as the catalyst. Then perfluorodecyl groups were grafted onto the surface of the pristine silica nanoparticles by introducing and hydrolyzing 1H,1H,2H,2H-triethoxydsilane (FAS-17). The characterization results showed successful grafting of perfluorodecyl groups on silica, leading to a transformation of the silica sol from hydrophilic to superamphiphobic, with water and n-hexadecane contact angles of 161° and 156°, respectively. The epoxy/F-SiO2 composite coating by mixing F-SiO2 with epoxy resin showed excellent water-repellency and anti-corrosion properties.