[article]
| Titre : |
Importance of Micellar Lifetime and Sub-micellar Aggregates in Detergency Processes |
| Type de document : |
texte imprimé |
| Auteurs : |
M. A. James-Smith, Auteur ; D. O. Shah, Auteur ; D. Shekawat, Auteur |
| Année de publication : |
2007 |
| Article en page(s) : |
p. 142-154 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Filtration
Membranes (technologie)
Micelles -- Stabilité
|
| Tags : |
Sub-micellar aggregates Nanoporous membranes Detergency |
| Index. décimale : |
668.1 Agents tensioactifs : savons, détergents |
| Résumé : |
Micelles are known to be dynamic entities, rapidly breaking and reforming continuously. Micellar dynamics can be manipulated by the addition of non-ionic or oppositely charged cosurfactant to a sodium dodecyl sulfate solution. Using filtration through nanoporous membranes we have shown that sodium dodecyl sulfate micellar solutions are not only made up of micelles and monomers, but also contain a high concentration of sub-micellar aggregates. The concentration of sub-micellar aggregates decreases as the micellar stability increases. We have investigated the role of micellar stability and sub-micellar aggregates in cleaning of fabrics and hard surfaces such as porcelain dishes. After careful observation, it was determined that more stable micelles and lower concentrations of sub-micellar aggregates lead to more efficient detergency. In summary, it is desirable to have relatively stable micelles and the least number of sub-micellar aggregates for efficient detergency. |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3214 |
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 44, N° 3/2007 (06-07/2007) . - p. 142-154
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