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    題名: Preparation of superhydrophilic nanosilica/polyacrylate hard coatings on plastic substrate for antifogging and frost‐resistant application
    作者: Chang, Chao‐Ching;Lin, Zi‐Min;Cheng, Liao‐Ping
    關鍵詞: antifog/frost coatings;bilayer design;organic–inorganic composite;plastic substrates;silica nanoparticles;UV‐curing
    日期: 2019-06-20
    上傳時間: 2019-09-26 12:10:50 (UTC+8)
    出版者: Wiley
    摘要: A series of photosensitive hydrophilic agents (T20) comprising Tween‐20, isophorone diisocyanate, and 2‐hydroxyethyl methacrylate moieties were synthesized and used in the preparation of antifog/frost resistant (AFF) hard coatings on plastic substrates. By means of a hydrophilic/hydrophobic bilayer design, the prepared coatings demonstrated not only AFF property but also water resistibility. The bottom layer is an organic–inorganic composite consisting of SiO2 nanoparticles embedded in a polymeric network of crosslinked dipentaethritol hexaacrylate. The AFF layer incorporates T20 in the formulations and links covalently with the bottom layer through a UV‐curing polymerization process. Various methods, for example, FTIR, SEM, contact angle, and steam/defrosting tests, were employed to characterize the prepared coatings. Optimally, the coatings were found to be transparent, strong (4H, pencil hardness), adhering perfectly (level 5B) to the poly(methyl methacrylate) substrate, and could be soaked in water for 24 h at 25 °C without losing hydrophilicity (contact angle ~0°) or antifogging capability.
    關聯: Journal of Applied Polymer Science, 136 (43), 48144
    DOI: 10.1002/app.48144
    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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