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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/107056

    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: 2016-08-15
    Publisher: Rochester Institute of Technology * College of Applied Science and Technology
    Abstract: Silica nanoparticles synthesized from tetraethoxysiliane (TEOS) via a solgel process were
    surface-modified by using 3-(trimethoxysilyl)propyl methacrylate (MSMA) and 1H, 1H, 2H, 2Hperfluorooctyltriethoxysilane
    (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.
    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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