| Titre : |
Faster estimation of photo-activity of effect pigments : A new method for determining the photocatalytic activity of pearlescent pigments coated with TiO2 |
| Type de document : |
texte imprimé |
| Auteurs : |
Lara Dabrowski, Auteur ; Julian Vogt, Auteur ; Marco Imhof, Auteur ; Laurent Deloux, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 40-44 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Dioxyde de titane
Photocatalyse
Photodétérioration
Photostabilité
Pigments à effets spéciaux
Pigments nacrés
Traîtements de surface
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Titanium dioxide often serves as interference layer in pearlescent pigments, but exhibits photocatalytic activity. While this can be determined by a number of methods, they are all time-consuming. The "Brilliant Blue FCF" method presented here is fast and yields results which correlate with Florida weathering while requiring less effort and only small amounts of pigment. |
| Note de contenu : |
- A new way to measure photoactivity
- Photoactivity of blue interference and anthracite-coloured pearlescent pigments
- Correlation with outdoor weathering results
- Fig. 1 : Schematic representation of photocatalytic processes on TiO2
- Fig. 2 : Photocatalytic degradation of brillant blue FCF ; samples before and after exposure
- Fig. 3 : Residual concentration of brilliant blue FCF after six hours exposure of pearlescent pigments without surface treatment
- Fig. 4 : Residual concentration of brilliant blue FCF in surface-treated variants after 20 h hours light exposure
- Fig. 5 : Correlation between weathering data and the indicator value for non-photostabilised pigments
- Fig. 6 : Correlation between weathering data and the photoactivity indicator for surface-treated pigments
- Table 1 : Residual concentration of brilliant blue FCF for non-surface-treated TiO2 pearlescent pigments after six hours' exposure to light
- Table 2 : Residual concentration of brilliant blue FCF for surface-treated pigments after 20 hours' exposure to light |
| En ligne : |
https://drive.google.com/file/d/1rvoNpQEV61hV1Agwt8Dynm8LnpZsKeR-/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=32298 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 4 (04/2019) . - p. 40-44
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