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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/108187

    Title: Preparation of Highly Transparent 13F-Modified Nano-Silica/Polymer Hydrophobic Hard Coatings on Plastic Substrates
    Authors: Chang, Chao-Ching;Lin, Zi-Min;Huang, Shu-Hui;Cheng, Liao-Ping
    Keywords: Colloidal Silica;Hard Coating;UV-curing;Plastic Substrate;Hydrophobic
    Date: 2015-12-01
    Issue Date: 2016-11-05 02:11:16 (UTC+8)
    Publisher: 淡江大學
    Abstract: Silica nanoparticles synthesized from tetraethoxysiliane (TEOS) via a sol-gel process were surface-modified by using 3-(trimethoxysilyl)propyl methacrylate (MSMA) and 1H, 1H, 2H, 2H- perfluorooctyltriethoxysilane (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 μm) on plastic substrates. Both FE-SEM imaging and UV-visible spectroscopy confirmed uniform dispersion of nano-silica in the hybrid thin films. The coating surfaces were extremely smooth, with average roughness over the range 1.0-2.3 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.
    Relation: Journal of applied science and engineering 18(4), pp.387-394
    DOI: 10.6180/jase.2015.18.4.10
    Appears in Collections:[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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