Fabrication and properties of n-SiO₂/m-SiO₂/PU superhydrophobic coatings

Abstract In order to eliminate the adverse effects of icing on surface mechanical devices such as power transmission cables and wind turbine blades due low temperature, nano-silica (n-SiO 2 ) micron-silica (m-SiO modified by silane coupling agent were blended with a mass ratio 5:1 subsequently compounded polyurethane (PU) obtain n-SiO /m-SiO /PU superhydrophobic coatings. It is shown that tight bonding m-SiO PU avoids cracking coating agglomeration improves stability coating. makes form dense rough structure, which increases air-liquid contact area trapping more air. The angle reached 158.10° at filling ratio(40 wt%), indicating prepared has excellent properties. very helpful in solving low-temperature problem outdoor equipment rain snow.