[article]
| Titre : |
Dispersing nanoscaled pigments and fillers |
| Type de document : |
texte imprimé |
| Auteurs : |
Jochen Winkler, Auteur |
| Année de publication : |
2008 |
| Article en page(s) : |
p. 105-118 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Charges (matériaux)
Dispersions et suspensions
Pigments
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Nanoscaled pigments and functional fillers are becoming more and more important as ingredients in paints, plastics and rubbers. These additives can improve material performance dramatically and lead to special effects that are uniquely connected to their presence. Yet, in order to be useful, they normally have to be dispersed down to primary particle sizes. In many cases, this is a difficult task to achieve. The reason is that, as agglomerates become smaller and smaller, they lose inertia and move with the liquid components of the mill base, thus avoiding mechanical stress situations. The paper will deal with the aspects of dispersing in general, distinguishing between the probability for agglomerates to be stressed and the probability for them to break. For the case of bead mills, the connection between the mechanical power input and the degree of dispersion will be demonstrated and concepts for dispersing nanoparticles will be presented. |
| Note de contenu : |
- Power input and dispersing time
- Energy density distribution in the milling chamber
- High speed attritor mills (bead mills)
- Shear versus impact
- Process control mechanical power
- Attractive forces between primary particles
- Influence of bead size on dispersion results
- Small agglomerates avoid stress situations |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12121 |
in PAINTINDIA > Vol. LVIII, N° 6 (06/2008) . - p. 105-118
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Dispersing nanoscaled pigments and fillers in PAINTINDIA, Vol. LVIII, N° 6 (06/2008)
