2O 3 and SiO 2 Aerogel Composite Coating]]>

摘要

AbstractIn this study, vacuum cold spraying was used as a simple and fast way to prepare transparent super-hydrophobic coatings. Submicrometer-sized Al2O3powder modified by 1,1,2,2-tetrahydroperfluorodecyltriethoxysilane and mixed with hydrophobic SiO2aerogel was employed for the coating deposition. The deposition mechanisms of pure Al2O3powder and Al2O3-SiO2mixed powder were examined, and the effects of powder structure on the hydrophobicity and light transmittance of the coatings were evaluated. The results showed that appropriate contents of SiO2aerogel in the mixed powder could provide sufficient cushioning to the deposition of submicrometer Al2O3powder during spraying. The prepared composite coating surface showed rough structures with a large number of submicrometer convex deposited particles, characterized by being super-hydrophobic. Also, the transmittance of the obtained coating was higher than 80% in the range of visible light.]]>