| Titre : | Emulsion stability in the presence of nonionic surfactant micelles : role of micellar ordering and ostwald ripening (2010) |
| Auteurs : | Youngsun Kong, Auteur ; Alex Nikolov, Auteur ; Darsh Wasan, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 49 N° 11, Juin 2010) |
| Article en page(s) : | pp. 5299–5303 |
| Note générale : | Industrial chemistry |
| Langues : | Anglais |
| Tags : | Emulsion Micellar Ordering |
| Résumé : | The phenomenon of surfactant micelle ordering (i.e., stratification) in emulsion films was investigated using the reflected-light microinterferometric technique. In thinning films formed from a nonionic micellar solution of ethoxylated alcohol (1 wt %), it was found that the small droplets (i.e., less than 5 µm) are separated by thick (>0.1 µm) stable films containing surfactant micelles in multilayers that prevent droplet flocculation and coalescence. The Ostwald ripening process governs emulsion stability over a long-term. The direct microscopic observations of the evolution of the drop size distribution over time of hexadecane drops (25 vol %) dispersed in an aqueous micellar solution (≈ 120 times critical micellar concentration) was compared with that calculated from the Ostwald ripening model. |
| ISSN : | 0888-5885 |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie901825c |
