應用於紫外光交聯高折射率有機-無機混成薄膜之二氧化鈦溶膠的製備與分析

Preparation and characterization of TiO2 sol for UV-cured high-refractive-index organic-inorganic hybrid thin films

林佳穎(Chia-Ying Lin)

指導教授 ： 張朝欽

淡江大學/工學院/化學工程與材料工程學系碩士班/碩士(2011年)

https://doi.org/10.6846/TKU.2011.00923

摘要

本研究利用紫外光交聯二氧化鈦溶膠混和壓克力單體在PMMA基材上成功製備出混成薄膜。使用溶膠-凝膠法在室溫且無添加表面活性劑下，合成二氧化鈦奈米粒子。藉由加熱回流程序，二氧化鈦奈米粒子轉變為部分結晶型態。所製備的二氧化鈦溶膠可提供旋轉塗佈製備混成薄膜時操作的控制。高折射率複合薄膜含有高比例的二氧化鈦奈米粒子和良好的透明性。在T1-sol中的二氧化鈦粒子雖然已有產生部分結晶但光催化能力並不好。這可能是由於有限程度的結晶二氧化鈦僅能降解部分有機分子。所有複合薄膜表現出良好的附著力，折射率隨二氧化鈦比例增加分佈在1.66-1.82範圍之間。這些結果證明所製備的二氧化鈦複合薄膜在光學元件上有應用的潛力，如防反射塗層。二氧化鈦溶膠的特性將藉由DLS、TEM、XRD和UV-Vis吸收來鑑定，而二氧化鈦複合薄膜則進行UV-Vis吸收、FTIR、N＆K、TGA、SEM、AFM和接觸角的分析。

關鍵字

光學塗膜 ； 二氧化鈦 ； 高折射率 ； 紫外光交聯 ； 有機-無機混成

並列摘要

In this study, UV-cured hybrid optical thin films were successfully prepared on PMMA substrates using TiO2 sols and acrylic monomers. TiO2 nanoparticles were synthesized via a sol-gel route at room temperature. Through the heat reflux process, the TiO2 nanoparticles became partial crystalline. The prepared TiO2 sols can provide operating control for the preparation of hybrid thin films by spin coating. Transparent high-refractive-index thin films were obtained with high TiO2 content. Photocatalytic ability of synthesized TiO2 nanoparticles was poor while some crystal structure existed. This may resulted from limited crystallinity of TiO2, and avoided a distinct degradation of organic moieties in the hybrids. TiO2 sols were characterized by DLS, TEM, XRD, and UV-Vis absorption, while TiO2 hybrid thin films were analyzed by UV-Vis absorption, FTIR, N&K, TGA, SEM, AFM, and contact angle. All hybrid thin films showed good adhesion to the PMMA substrate with refractive index falling over the range 1.66-1.82. These results suggested the potential application of present TiO2 hybrid films in optical devices, such as anti-reflective coatings.

並列關鍵字

optical coatings ； organic-inorganic nanocomposites ； UV-curable ； high refractive index ； titanium dioxide

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