Preparation and characterization of TiO2 sols and their UV-cured hybrid thin films on plastic substrates

被引：0
作者：
Chao-Ching Chang
Liao-Ping Cheng
Chia-Ying Lin
Yang-Yen Yu
机构：
[1] Tamkang University,Department of Chemical and Materials Engineering
[2] Tamkang University,Energy and Opto
[3] Ming Chi University of Technology,Electronic Materials Research Center
[4] Ming Chi University of Technology,Department of Materials Engineering
来源：
Journal of Sol-Gel Science and Technology | 2012年 / 63卷
关键词：
TiO; sol; Sol–gel; High refractive index; Optical thin film; UV-curing; Particle size; Plastic substrate; Photocatalytic ability;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
In this research, TiO2 sols were synthesized via a sol–gel reaction at room temperature followed by heating under reflux. Hybrid thin films were prepared using the TiO2 sols and dipentaerythritol hexacrylate on poly(methyl methacrylate) substrates via spin coating followed by UV-curing. The images of transmission electron microscopy (TEM) and results of dynamic light scattering (DSL) showed that some originally synthesized TiO2 nanoparticles aggregated while many small-sized (~5 nm) TiO2 nanoparticles still existed after reflux heating. The synthesized TiO2 sols showed poor photocatalytic ability, which might avoid degradation of organic moieties in the hybrids. The refractive indices of the hybrid thin films were increased from 1.66 to 1.82 while the water contact angles on the thin films were increased from 70.2° to 87.7° with the increment of TiO2 content. Increasing the heating time of the TiO2 sol resulted in an increase in the refractive index and contact angle.
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页码：30 / 35
页数：5
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