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Citation: ZHANG Zhihui, HE Junhui, YANG Qiaowen. Surfactant-assisted Preparation of Mechanically Durable Superhydrophilic Antireflective Silica Nanoparticle Coatings by Acid Catalyzed Sol-Gel Process[J]. Chinese Journal of Applied Chemistry, ;2013, 30(7): 794-800. doi: 10.3724/SP.J.1095.2013.20354 shu

Surfactant-assisted Preparation of Mechanically Durable Superhydrophilic Antireflective Silica Nanoparticle Coatings by Acid Catalyzed Sol-Gel Process

a. Functional Nanomaterials Laboratory, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
b. School of Chemical and Environmental Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China

Received Date: 17 August 2012
Revised Date: 4 December 2012

Silica (SiO₂) nanoparticle coatings were fabricated using tetraethoxysilane(TEOS),cetyltrimethylammonium bromide(CTAB),hydrochloric acid(HCl),ethanol and water via the sol-gel process followed by dynamic hardening at 700℃ for 200 s. Effects of the CTAB concentration,withdrawing speed,retaining time and the number of withdrawing were investigated on the transmittance of fabricated coatings. It was found that the fabricated coating achieved the maximum transmittance of 95.9% when a CTAB mass percentage of 2.5%,a withdrawing speed of 100 mm/min,a retaining time of 60 s and one withdrawing were used. The coating was superhydrophilic,and could endure a 6H pencil hardness test. It was also shown that the CTAB added in the SiO₂ sol might interact with partially hydrolyzed species of TEOS,improving the nanostructure of SiO₂ sol formed by acid-catalysis,and eventually enhanced the transmittance and hydrophilicity of fabricated coatings.
- acid catalyzed,
- sol-gel method,
- antireflective,
- superhydrophilic,
- abrasion-resistant
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