[article]
| Titre : |
Investigating the role of surface treated titanium dioxide nanoparticles on self-cleaning behavior of an acrylic facade coating |
| Type de document : |
texte imprimé |
| Auteurs : |
S. Pazokifard, Auteur ; M. Esfandeh, Auteur ; Seyed Mojtaba Mirabedini, Auteur ; Mohsen Mohseni, Auteur ; Z. Ranjbar, Auteur |
| Année de publication : |
2013 |
| Article en page(s) : |
p. 175-187 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Dioxyde de titane
Essais accélérés (technologie)
Greffage (chimie)
Nanoparticules
Photocatalyse
Photodétérioration
Polyacryliques
Revêtement auto-nettoyant:Peinture auto-nettoyante
Revêtements
Rhodamine
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.
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
In this study, the addition of silane treated TiO2 nanoparticles on the self-cleaning properties of an acrylic facade coating was evaluated. Tetraethoxyorthosilicate, TEOS, was used for surface treatment of TiO2 nanoparticles. The silica grafting on the TiO2 nanoparticles was characterized via Fourier Transform Infrared spectroscopy, specific surface area measurement, pore size distribution, and real density measurements. The effect of surface treatment and content of nanoparticles on the photocatalytic activity of acrylic coating and self-cleaning properties was studied. For this purpose, the photodegradation of Rhodamine B (Rh.B) dyestuff, as a colorant model, was investigated by colorimetric technique, while the coating samples were exposed to UVA irradiation. Performance of the acrylic coating films was evaluated by gloss change during accelerated weathering conditions. Also, the surface morphology of the coating films was studied using SEM analysis. The results showed that the addition of both treated and untreated TiO2 nanoparticles provides self-cleaning property to the acrylic coatings. However, silica surface treatment of TiO2 nanoparticles reduces the coating degradation caused by TiO2. This is more evident when higher concentrations of the treated TiO2 nanoparticles are used. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Silanization of TiO2 nanoparticles - Surface characterization of the treated TiO2 - Preparation of acrylic coatings - Dispersion of TiO2 nanoparticles in the coatings - Colorimetric study of Rh.B degradation - Durability of the coatings
- RESULTS AND DISCUSSION : Characterization of silica treated TiO2 nanoparticles - Dispersion of nanoparticles in the coatings - Photocatalytic activity studies - Self-cleaning property - Coating durability |
| DOI : |
10.1007/s11998-012-9428-4 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-012-9428-4.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18236 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 10, N° 2 (03/2013) . - p. 175-187
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