溶膠凝膠法製備有機-無機混成彩色光學塗膜

Preparation of organic-inorganic hybrid color optical coatings by sol-gel process

陳品莼(Pin-Chun Chen)

指導教授 ： 鄭廖平

淡江大學/工學院/化學工程與材料工程學系碩士班/碩士(2014年)

https://doi.org/10.6846/TKU.2014.00139

摘要

本研究之內容分為彩色光學塗膜和有機光致變色塗膜兩個部分，前者乃藉助於溶膠-凝膠及紫外光硬化兩技術，來製備有機-無機染料光學塗膜，先將偶合劑(異氰酸丙基三乙氧基矽烷)與黃色染料(C. I. Disperse Yellow 9)以共價鍵方式合成出改質染料，由FTIR和1H NMR加以證實，接下來將改質染料接枝於二氧化矽顆粒表面，之後再由紫外光照射硬化成膜，探討塗膜之耐熱、耐光性及實用性，由DSC及TGA熱性質分析可以發現，二氧化矽粒子含量越高對熱性質影響越大，而化學接枝於二氧化矽表面之染料，其耐熱性優於物理性吸附於二氧化矽表面之染料。由UV-Vis光譜及CIE色度座標分析，發現在230 oC、1小時的熱處理下，無機改質確實可以減輕染料的裂解，在紫外光曝光測試也呈現改質後比未改質表現好之趨勢。利用三成分組成圖，我們可以圈選出符合實用條件的彩色光學鍍膜組成。
有機光致變色塗膜的研究方面，選用紫精為變色染料，將其分散於塗料中並硬化成膜，探討紫精在塗膜中的濃度對塗膜之退色時間、顏色深度及塗膜之硬度、附著度等性質的影響。光致變色塗膜之退色速度快，由UV-Vis測試得知，約一分鐘就接近原本顏色；而曝光能量愈高，顏色較深，但是紫精染料佔塗膜中的含量越高，硬度及附著度會隨之降低。

關鍵字

溶膠凝膠法 ； 分散型染料 ； 紫精

並列摘要

This research is divided into two parts: color optical coating and organic photochromic coating. The former involves the use of sol-gel method to prepare organic - inorganic optical coatings. First, the coupling agent (3-(Isocyanatopropyl)triethoxysilane) was covalently bonded to the yellow dye (C.I. Disperse Yellow 9), as confirmed by the FTIR and 1H NMR analyses. Then the silanized dye was grafted on silica particles that were surface-modified by 3-(trimethoxysilyl) propyl methacrylate. The formed particles were UV-cured with the multifunctional monomer, dipentaerythritol hexaacrylate, to yield color coatings on PMMA. The thermal properties of the particles were investigated by DSC and TGA analyses. It was found that thermal properties of the dye grafted on the silica surface were better than that absorbed on the silica surface. UV-Vis spectra and CIE chromaticity coordinates indicates that inorganic modification could lessen dye-cracking during one-hour heat treatment of the coating at 230oC. The UV exposure test also showed good performance of the modified dye. Using a three- component composition diagram, we can effectively identify the suitable compositions for making color optical coatings that meet application standard.
Regarding the photochromic coating research, the dye, viologen, was dispersed in a coating formulation and then UV-cured. The effect of viologen concentration on the bleaching time, color depth, film hardness, and adhesion was studied. The experimental results showed that the coating bleached rapidly after UV-exposure; the coating approached its original color in about one minute. While higher amount of UV-irradiation caused deeper color, higher viologen content in the coating resulted in lower hardness and poorer adhesion.

並列關鍵字

sol-gel process ； disperse dye ； viologens

參考文獻

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