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    題名: Preparation of highly transparent 13F-modified nano-silica/polymer hydrophobic hard coatings on plastic substrates
    作者: Chao-Ching Chang;Zi-Min Lin;Shu-Hui Huang;Liao-Ping Cheng
    關鍵詞: Colloidal Silica;Hard Coating;UV-curing;Plastic Substrate;Hydrophobic
    日期: 2015-12
    上傳時間: 2016-08-15
    出版者: Rochester Institute of Technology * College of Applied Science and Technology
    摘要: Silica nanoparticles synthesized from tetraethoxysiliane (TEOS) via a solgel process were surface-modified by using 3-(trimethoxysilyl)propyl methacrylate (MSMA) and 1H, 1H, 2H, Hperfluorooctyltriethoxysilane
    (13F). MSMA acted as a coupling agent and a C=C provider, whereas
    13F was employed to enhance hydrophobicity. The surface-modified silica particles together with a
    multi-functional monomer were UV-cured to yield highly transparent thin films (~7 m) on plastic substrates. Both FE-SEM imaging and UVvisible spectroscopy confirmed uniform dispersion of nano-silica in the hybrid thin films. The coating surfaces were extremely smooth, with average roughness over the range 1.02.3 nm based on profilometric measurements. X-ray photoelectron spectroscopy indicated that surface-modified silica particles have migrated to the top surface to reduce the surface energy. Therefore, only a small dosage of 1 mol% (vs. TEOS) was enough to engender surface hydrophobicity with water contact angle of 100. Furthermore, all of the prepared coatings were hard with pencil hardness reached 6H, and they adhered strongly to the poly(methyl methacrylate) substrate according to the peel test.
    關聯: Journal of Applied Science and Engineering 18(4), p.387-394
    DOI: 10.6180/jase.2015.18.4.10
    顯示於類別:[化學工程與材料工程學系暨研究所] 期刊論文

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