[article]
| Titre : |
On the potential of mean force of a sterically stabilized dispersion |
| Type de document : |
texte imprimé |
| Auteurs : |
R. Catarino Centeno, Auteur ; E. Perez, Auteur ; Armando Gama Goicochea, Auteur |
| Année de publication : |
2014 |
| Article en page(s) : |
p. 1023-1031 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Colloides
Dioxyde de titane
Dispersions et suspensions -- Stabilité
Dynamique moléculaire
Polymères ramifiés
Thermochimie
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The potential of mean force (PMF) is the total free energy of a many-body colloidal system, and consequently it includes all the interactions the colloids experience due to collisions with themselves and with the solvent. Here, the PMF of a colloidal dispersion under various circumstances of current interest, such as varying solvent quality, polymer coating thickness, and addition of electrostatic interaction, is obtained from radial distribution functions available from the literature. They are based on implicit-solvent, computer simulation studies of a model TiO2 dispersion that takes into account three major components to the interaction between colloidal particles, namely van der Waals attraction, repulsion between polymer coating layers, and a hard-core particle repulsion. In addition, a screened form of the electrostatic interaction was included. It is argued that optimal conditions for dispersion stability can be derived from a comparative analysis of the PMF under the different situations studied. This thermodynamics-based analysis is believed to be more accessible to specialists working on the development of improved colloidal formulations than that based on the more abstract, radial distribution functions. |
| DOI : |
10.1007/s11998-014-9600-0 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-014-9600-0.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=22358 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 11, N° 6 (11/2014) . - p. 1023-1031
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On the potential of mean force of a sterically stabilized dispersion in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 11, N° 6 (11/2014)
