Preparation of high hardness hydrophobic SiO2 anti reflective thin films from mixed acid catalyzed and alkali catalyzed sols

IF 2.3 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS Journal of Sol-Gel Science and Technology Pub Date : 2024-12-02 DOI:10.1007/s10971-024-06611-6

Zhihang Shang, Zhiqiang Li, Xiang Zhou, Xingzhou Zhanwang, Lifang Nie, Juncheng Liu

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Abstract

High-hardness hydrophobic anti-reflection thin films were prepared by a mixture of acid-catalyzed and alkali-catalyzed sols using tetraethyl silicate (TEOS) and methyltriethoxysilane (MTES) bisilicon sources as precursors. The alkali-catalyzed SiO₂ sol and the acid-catalyzed SiO₂ sol modified with aliphatic alcohol ethoxylated ether (AEO) were synthesized firstly, and then the acid-catalyzed SiO₂ sol was doped into the alkali-catalyzed SiO₂ sol in a certain ratio to prepare the anti-reflection thin films. The effects of the doping ratio of acid-catalyzed SiO₂ sol on the microstructures and properties of thin films were investigated. The experimental results show that both the transmittance and the contact angle increase and then decrease with the increasing of the doping ratio of acid-catalyzed SiO₂ sol, and the surface hardness and adhesion are gradually enhanced. When the doping ratio of acid-catalyzed SiO₂ sol is 30%, the average transmittance of the reflectance-reducing film is 92.51% in the wavelength range of 400–1100 nm, which is 5.17% higher than that of the blank glass. The water contact angle of the reflectance-reducing film is up to 92°, and the adhesion of the film is the highest level 0. After 100 h of UV exposure, the transmittance of the film was reduced by 1.1%.

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来源期刊

Journal of Sol-Gel Science and Technology 工程技术-材料科学：硅酸盐

CiteScore

4.70

自引率

4.00%

发文量

280

审稿时长

2.1 months

期刊介绍： The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.