期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 328, 期 1-3, 页码 67-72出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2008.06.026
关键词
Titania nanocrystals; Hybrid coatings; High refractive index; Sol-gel preparation
资金
- National Science Foundation of China [20534040]
- National Basic Research Program of China [2007CB936402]
High refractive index hybrid coatings were prepared by directly incorporating anatase titania (TiO2) nanocrystals (NCs) into (3-glycidyloxypropyl) trimethoxysilane organic silica sol followed by a sol-gel process. The anatase TiO2 NCs were prepared by controlling hydrolysis of titanium alkoxide in acid solution, and they show a narrow size distribution centered at about 4 nm and very good dispersibility in the silica sol. After doped with TiO2, the coatings possessed excellent surface smoothness and high optical transparency in the visible range. The refractive index at 632.8 nm increased from 1.502 to 1.663 as the TiO2 weight content goes from 10% to 50%. Besides, the hybrid coatings also had good thermal stability and high hardness of 3H, which have promising application in antireflection coatings. (C) 2008 Elsevier B.V. All rights reserved.
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