[article]
| Titre : |
Thermal analyses of dye Disperse Red 1 grafted onto silica nanoparticles |
| Type de document : |
texte imprimé |
| Auteurs : |
Chao-Ching Chang, Auteur ; Feng-Hsi Huang, Auteur ; Zi-Min Lin, Auteur ; Liao-Ping Cheng, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 731-738 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Analyse thermique
Colorants
Matériaux -- Détérioration
Nanoparticules
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
Stabilité thermique
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
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-isocyanatopropyltriethoxysilane, 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 (DSiO2) were also prepared for comparison, for which DR1 was bound only physically to silica instead of covalent bonds. The thermal behaviors of the formed GSiO2 and DSiO2 were examined by means of differential scanning calorimetry 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, crystalline 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 monomer to yield color coatings on glass substrates. UV–visible spectra indicated that brightness and color saturation of the coating comprising GSiO2 could be maintained better than that comprising DSiO2 after heat treatment at 280°C. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Modification of the dye - Preparation of dye-grafted siilica nanoparticles - Preparation of colored coatings - Characterization
- RESULTS AND DISCUSSION : Chemical analyses - Thermal analyses of the dye-adsorbed and dye-grafted silica - Thermal stability of the coatings |
| DOI : |
10.1007/s11998-015-9670-7 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-015-9670-7.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24407 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 12, N° 4 (07/2015) . - p. 731-738
[article]
|
Aller sur edunet
Accueil
Thermal analyses of dye Disperse Red 1 grafted onto silica nanoparticles in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 12, N° 4 (07/2015)
