疏水性抗反射BEA沸石膜; Preparation of Anti-Reflective BEA zeolite coating on glass

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Title:	疏水性抗反射BEA沸石膜;Preparation of Anti-Reflective BEA zeolite coating on glass
Authors:	陳建宏;Chien-Hung Chen
Contributors:	化學工程與材料工程研究所
Keywords:	抗反射膜;溶膠凝膠法;沸石;sol-gel coating;Anti-reflection film;Zeolite
Date:	2010-07-29
Issue Date:	2010-12-08 13:37:24 (UTC+8)
Publisher:	國立中央大學
Abstract:	相較於MFI沸石，BEA沸石擁有較多的孔隙率，因此也適合用於低折射率材料的製作，對於折射率為1.52的玻璃基板而言，理想的抗反射膜其折射率為 1.23，要做出低折射率材料的方法，就是使用高孔隙性材料，對二氧化矽來說，其孔隙率要超過60%才能達到理想的抗反射效果。本實驗的目的是增強抗反射膜的機械性質，並且維持抗反射效果。本研究中所使用的鍍膜方式為玻璃基板的雙面浸鍍，鍍膜液是由沸石溶膠、界面活性劑和乙醇所組成，研究中所要討論的控制變因有三個：(1)沸石前驅物和奈米結晶粒子的比例(MFI和BEA沸石)(2)熱處理方法(3)後處理步驟(鹼液震洗、撥水劑疏水改質)，目的是找出能夠提升膜的機械強度並維持其理想抗反射效果(反射率小於1%)之適當配方、熱處理方法和對沸石膜做後處理步驟，最後會對膜做光學和機械性質的測試。 Compare to MFI zeolite,BEA zeolite has more porosity, so it is an ideal low-refractive material. For a glass substrate (ns=1.52), an ideal homogeneous AR l-ayer would need an index of 1.23. The easy way to achieve such a low inde-x is a porous coating. However, in most cases this would mean a porosity larger than 60% for silica. The goal of this research is to strengthen AR film and still have good anti-reflection effect. AR layers were prepared by dip-coating both sides of glass substrates with a sol made form a combination of nano-zeolite precursors, surfa-ctant and ethanol. The major variables investigated were the recipe(the ratio of concentrated zeolite precur- sor and nano crystal particle) , the heat treatment method after coating, the film was washed in alkaline solution with ultrasonic by cleaning up the amorphous layer，and hydrophobic-modification by silane to against scratch resistance. The reflectivity and mechanical strength of the obtained coatings was studied to identify the best recipe and heat treatment, along with critical issues such as adhesion strength, scratch resistance.
Appears in Collections:	[National Central University Department of Chemical & Materials Engineering] Electronic Thesis & Dissertation

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