Refractive Index Control and Rayleigh Scattering Properties of Transparent TiO2 Nanohybrid Polymer

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• 作者：Hendry I. Elim ; Bin Cai ; Yu Kurata ; Okihiro Sugihara ; Toshikuni Kaino ; Tadafumi Adschiri ; Ang-Ling Chu ; Nobuyuki Kambe
• 刊名：Journal of Physical Chemistry B
• 出版年：2009
• 出版时间：July 30, 2009
• 年：2009
• 卷：113
• 期：30
• 页码：10143-10148
• 全文大小：402K
• 年卷期：v.113,no.30(July 30, 2009)
• ISSN：1520-5207

文摘

The surface of TiO₂ nanoparticles (NPs) was modified by a coupling agent of 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane to render them highly compatible with organic monomer mixtures avoiding aggregation. Such TiO₂ NPs were then chemically attached with a prepolymer. The refractive index of hybrid TiO₂ NPs−polymer was increased dramatically in comparison with that of pure polymer, and it can be controlled by adjusting the content of TiO₂ NPs. The Rayleigh scattering of hybrid TiO₂ NPs−polymer was size-dependent and increased with the increase of the TiO₂ NPs content. When Rayleigh scattering of the hybrid material prepared with a milling and centrifuge process was significantly lowered, one can obtain a transparent sample, which is good for optical devices.