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    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/116087

    Title: Preparation of dye-grafted-silica/poly(acrylate) color coatings with enhanced color stability at elevated temperatures
    Authors: Chang, Chao-Ching;Huang, Feng-Hsi;Cheng, Liao-Ping
    Keywords: Dyes;Thermal stability;Resins;Coloured callus;Nanocomposite coatings;Pencil hardness;Silica nanoparticles
    Date: 2018-05-08
    Issue Date: 2019-03-30 12:11:32 (UTC+8)
    Publisher: Emerald Publishing Limited
    Abstract: Purpose
    The purpose of this paper is to investigate the effects of dipentaerythritol hexaacrylate (DPHA) and 3-(trimethoxysilyl)propyl methacrylate-modified silica nanoparticles (MSiO2) contents on the performances of the Disperse Red 1 (DR1)-grafted-silica/poly(acrylate) color hard coatings.

    The organic dye DR1 was silylated by reaction with the coupling agent 3-isocyanatopropyltriethoxysilane in methyl ethyl ketone. The silylated-DR1 thus obtained was grafted on MSiO2 to form dye-grafted silica (GSiO2). This hybrid dye was then UV-cured with the cross-linking agent, DPHA, to yield color coatings. Thermal durability of the coatings was evaluated based on their CIE (international commission on illumination) chromaticity coordinates and UV/Vis transmittances.

    The results indicated that GSiO2-coatings could tolerate thermal attack better than pristine DR1-coatings or dye-absorbed silica (DSiO2)-coatings because of the fact that DR1 was more finely dispersed in the polymer binder when covalently bonded to the silica particles. Under optimal conditions, coatings with very small change of saturation and hue after high-temperature treatments were obtainable. These coatings appeared transparent, had 3H-6H pencil hardness and adhered perfectly onto the poly(methyl methacrylate) substrates.

    Practical implications
    Dye-grafted color coatings may find applications such as color filter photoresists for displays, microelectronics, printed circuit boards, etc.

    The performances of the coatings were evaluated in terms of mechanical strength, adherence to the substrate, transmittance and color stability against heat treatments, which have not been disclosed. Also, using a newly developed triangular composition diagram, suitable ranges for preparing useful color coatings were accessed. The present method deserves further research studies on green and blue dyes.
    Relation: Pigment & Resin Technology 48 (1), p.36-44
    DOI: 10.1108/PRT-03-2018-0031
    Appears in Collections:[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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