| Titre : |
Dependent light scattering in white paint films : clarification and application of the theoretical concepts |
| Type de document : |
texte imprimé |
| Auteurs : |
J.-C. Auger, Auteur ; Brian Stout, Auteur |
| Année de publication : |
2012 |
| Article en page(s) : |
p. 287-295 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Dioxyde de titane
Lumière -- Diffusion
Pigments inorganiques
Revêtements
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Among the numerous publications analyzing the causes and consequences of titanium dioxide crowding on the optical properties of white paint films, one notes some inconsistencies. First, a significant number of studies are inclined to describe “dependent” and “multiple” scattering of light as distinct phenomena. Second, the transition from independent to dependent light-scattering is often associated with an ill-defined “threshold” concentration. The aim of this study is to clarify the intricate connections between these two scattering regimes and in particular to show that for white paint films loaded with rutile titanium dioxide pigments, “dependent” light scattering is merely a particular manifestation of multiple scattering processes. We also clarify that the transition from independent to dependent scattering is a continuous process that cannot be formally related to a specific threshold in the pigment volume concentration. Finally, we propose a simple method based on the dependent scattering amplitude to assist paint formulators facing the task of improving the hiding power of a white paint either by increasing the quantity of pigments or by improving their spatial state of dispersion. |
| Note de contenu : |
- STUDY OF ELECTROMAGNETIC COUPLINGS INVOLVED IN LIGHT-SCATTERING PROCESSES BETWEEN TIO2 PIGMENTS : Previous clafirication - Review of the light propagation models in heterogeneous media - Charaterization of the single-to-multiple scattering transitions - Characterization of the independent-to-dependent scattering transition - Far-field coherent scattering - Evidence of far-field coherent scattering vs near-field interaction via numerical simulations - Partial conclusions
- STUDY OF THE DEPENDENT LIGHT-SCATTERING TRANSITION : Description and characterization of dependent scattering transition - Characterization of dependent light-scattering amplitude
- PRACTICAL APPLICATION |
| DOI : |
10.1007/s11998-011-9371-9 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9371-9.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=15953 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 9, N° 3 (05/2012) . - p. 287-295
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Dependent light scattering in white paint films : clarification and application of the theoretical concepts in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 9, N° 3 (05/2012)
