本研究以溶膠-凝膠法對奈米二氧化矽表面改質，使改質後之二氧化矽具備了壓克力官能基，此官能基使得奈米粒子在混入光固化樹脂並進行固化後，粒子與樹脂間是以共價鍵的形式做鍵結。再將其混入UV樹脂形成有機-無機混成塗料，最後以紫外光固化在光學塑膠表面形成硬塗層。在本研究當中考量到分散性及成本因素，選擇之矽烷氧改質劑用量為MSMA/SiO2=1，反應後之粒徑約為25nm，改質劑多以T3結構鍵結在二氧化矽上。
而在光固化塗層方面，首先於壓克力基板上，探討了固化照度、奈米粒子的添加量、單體添加與否、膜層厚度，以及烘烤溫度之影響。最後當照度為1200mj/cm2且添加25wt%的PETTA、5wt%的改質後之粒子且於溫度80。C下烘烤，得到鉛筆硬度9H附著度5B穿透度大於90%，經鋼絲絨磨耗測試後∆T值小於1，顯示此膜層可以有效的提升基板之機械性質。而於PET基板上，主要探討如何降低基板對膜層之影響，最後利用多層膜製成，藉由控制底漆照度來改善附著度問題，但相對的也犧牲了鉛筆硬度。在考量鉛筆硬度與附著度的情況下，得到鉛筆硬度6H、附著度3B、穿透度大於87%，且經磨耗測試後∆T值小於1之膜層。

In this study, the modified SiO2 was synthesized by the sol-gel process. Using the 3-(trimethoxysilyl)propyl methacrylate as our coupling agent to react with colloidal silica. In this study, the best modification ratio of MSMA to SiO2 is 1, and called it MA-SiO2. An UV curable, transparent anti-scratch coating made from mixing MA-SiO2 and UV resin were prepared to enhance the hardness and scratch resistance of the plastic substrate. The content of MA-SiO2 and the effects brought by other experimental parameters were discussed in this study. The best result of pencil hardness can reach 9H on the plastic substrate with sufficient film thickness. After coating, the abrasion resistance of the substrate can be enhanced dramatically.

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