Construction of glass surface microstructure and adjustment of its haze and hydrophilicity/hydrophobicity

The work aims to improve the haze of frosted glass and control its surface hydrophilicity and hydrophobicity. The micro-and nano-structure of frosted glass surface was controlled by adding different concentrations of KCl into the etching solution. The surface morphology and roughness were characterized and analyzed by optical profilometer. The haze and transmittance of frosted glass were measured by spectrophotometer, and the hydrophilicity and hydrophobicity of frosted glass were analyzed and evaluated by contact angle measuring instrument. The frosted glass with different surface microstructure and surface roughness was obtained by adjusting the amount of KCl in the etching solution. The KCl in the etching solution can increase the haze of the frosted glass by one order of magnitude, from 4.23% to 73.11%, without decreasing the glass transmittance. By adding 20% KCl into the etch solution, the surface of the frosted glass was hydrophilic, with a contact angle reducing to 20.9°, while the contact angle of the original glass was only 47.5°. The surface of frosted glass was coated with 1H,1H,2H,2H-tridecafluoro-n-octyltriethoxysilane and heat-treated at 100 ℃ for 30 min to realize the strong hydrophobicity of the frosted glass and the contact angle of water reaching 124.3°. The surface microstructure of etched glass can be constructed by adding KCl into the etching solution, and the transmittance and haze of frosted glass can be improved by controlling the amount of KCl, so as to achieve better hydrophilicity. The low surface energy substance 1H,1H,2H,2H-Tridecafluoro-n-octyltriethoxysilane was used to modify the surface microstructure of the frosted glass, and the hydrophilic frosted glass could be changed into a strong hydrophobic glass. © 2021, Chongqing Wujiu Periodicals Press. All rights reserved.