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    題名: Thermal analyses of dye Disperse Red 1 grafted onto silica nanoparticles
    作者: Chang, Chao-Ching;Huang, Feng-Hsi;Lin, Zi-Min;Cheng, Liao-Ping
    日期: 2015-07-01
    上傳時間: 2017-05-04 02:10:13 (UTC+8)
    摘要: Dye-grafted silica nanoparticles (GSiO2 ) were synthesized via a dual-step process involving, first, attachment of the organic dye Disperse Red 1 (DR1) to the coupling agent, 3-isocyanatopropyltri-
    ethoxysilane, by means of urethane bonds, and then
    grafting of the silylated-DR1 onto silica nanoparticles
    (6 nm) prepared by hydrolysis and condensation of
    tetraethoxysilane in a sol–gel process. Dye-adsorbed
    silica nanoparticles (DSiO 2 ) were also prepared for
    comparison, for which DR1 was bound only physically
    to silica instead of covalent bonds. The thermal
    behaviors of the formed GSiO 2 and DSiO 2 were
    examined by means of differential scanning calorime-
    try and thermal gravimetric analysis. The results
    showed that both the particle size and silica content
    have significant effects on the thermal behaviors of the
    dye-adsorbed and dye-grafted silica. Moreover, crys-
    talline DR1 lost significantly its crystallinity after being
    adsorbed on silica, and became virtually amorphous
    after being grafted onto silica. The formed particles
    were UV-cured with a multifunctional acrylic mono-
    mer to yield color coatings on glass substrates. UV–
    visible spectra indicated that brightness and color
    saturation of the coating comprising GSiO 2 could be
    maintained better than that comprising DSiO 2 after
    heat treatment at 280C.
    關聯: Journal of Coatings Technology and Research, 12(4), pp.731-738
    DOI: 10.1007/s11998-015-9670-7
    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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