Spray coated superamphiphobic surface with hot water repellency and durable corrosion resistance

摘要

Superamphiphobic surfaces with low sliding angles, hot water repellency and multi-functionalities are attractive in academic and industrial fields but very challenging to construct. Herein, we present a facile spray-coated polyperfluoroalkylsilane/Si nanoparticles (fluoroPOS/SiO2 NPs) surface featuring excellent static and dynamic superamphiphobicity towards various liquids including cold water, strong acid/alkali, hot water and even n-hexadecane with surface tension as low as 27.5 mNm(-1). The fluoroPOS/SiO2 NPs were fabricated by one-pot hydrolytic co-condensation of tetraethyl orthoilicate (TEOS) and 1H, 1H, 2H, 2H-perfluorodecyltriethoxysilane (PFDTES) in the presence of SiO2 NPs. The morphologies and chemical compositions of the fabricated super-amphiphobic (SAPB) surface were analyzed. The electrochemical impedance spectroscopy (EIS) results present a significant improvement by five orders of magnitude of the R-ct value. After ten days exposure to corrosive environments, the R-ct value shows little changes demonstrating an outstanding long term anticorrosion performance. We believe this versatile and applicable SAPB fabrication strategy could supply a promising functional materials for broad domains.