| Titre : |
A Monte Carlo determination of the effectiveness of nanoparticles as spacers for optimizing [TiO.sub.2] opacity |
| Type de document : |
texte imprimé |
| Auteurs : |
Michael P. Diebold, Auteur |
| Année de publication : |
2011 |
| Article en page(s) : |
p. 541-552 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Dioxyde de titane
Nanoparticules
Opacifiants
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Optimal [TiO.sub.2] opacity is achieved when the [TiO.sub.2] particles are well spaced. Nanoparticle extenders are claimed to improve [TiO.sub.2] spacing by positioning themselves between the larger [TiO.sub.2] particles (0.25 [micro]m) and preventing the [TiO.sub.2] particles from approaching or touching one another. Claims have been made that this can as much as double the light-scattering efficiency of [TiO.sub.2]. This concept was tested by a combination of Monte Carlo simulations and image analysis techniques to determine computationally how the effectiveness of this approach is affected by [TiO.sub.2] concentration, nanoparticle concentration, and nanoparticle size. Surprisingly, the results showed that nanoparticles did not, in fact, improve the spacing of [TiO.sub.2] particles under any of the conditions examined (specifically, in the absence of any inter-particle interactions). Instead, [TiO.sub.2] distributions and spacings were completely indifferent to the presence of smaller particles (however, large extender particles were found to cause [TiO.sub.2] crowding, consistent with expectations and experiments). Explanation and implications of these findings are discussed. |
| Note de contenu : |
- Randomization of particle positions
- Quantification of TiO2 dispersion
- Computational protocol |
| DOI : |
10.1007/s11998-011-9342-1 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-011-9342-1.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12133 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 8, N° 5 (10/2011) . - p. 541-552
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A Monte Carlo determination of the effectiveness of nanoparticles as spacers for optimizing [TiO.sub.2] opacity in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 8, N° 5 (10/2011)
