Preparation and Performance Study of Surface Modified Porous Silica Anti-reflective Coating
SiO2 sol has been successfully synthesized using tetraethyl orthosilicate as a precursor and triblock copolymer surfactant F127 as template with hydrochloric acid as the catalyst.The SiO2 coating was deposited on quartz substrates using the dip-coating method,and film surface modification was carried out by grafting 1H,1H,2H,2H-perfluorodecyltriethoxysilane to improve the environmental stability of the film.The optical properties and durability of the film were investigated using UV-Vis-NIR spectrometer,contact angle tests,and environmental stability experiments.The results show that the transmittance of the modified film at the central wavelength of 1 600 nm reaches 99.3%,and the water contact angle of the film is 93°.After being placed in an environment of 80%relative humidity and 40° for 7 days,the transmittance only decreased by 0.5%and the contact angle only decreased by 1.75°,indicating that the film has good environmental stability.
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