[article]
| Titre : |
Formation of multilamellar vesicles in the systems of decyltrimethylammonium hydroxides/2-hydroxy 1-carboxynaphthoate and octyltrimethylammonium hydroxides/2-hydroxy 1-carboxynaphthoate |
| Type de document : |
texte imprimé |
| Auteurs : |
R. Abdel-Rahem, Auteur |
| Année de publication : |
2007 |
| Article en page(s) : |
p. 168-175 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Surfactants
|
| Tags : |
Alkyltrimethylammonium hydroxides 2-hydroxy-1-carboxy-naphthoate Multilamellar vseicles Viscoelastic surfactants Yield stress |
| Index. décimale : |
668.1 Agents tensioactifs : savons, détergents |
| Résumé : |
We have investigated the phase behavior and characterized the microstructure of the phases that result from mixing of alkyltrimethylammonium hydroxides CxTAOH (x = 10.8) with 2-hydroxy 1-carboxy-naphthoate. We compare the results of this work with the published one of alkyltrimethylammonium 2-hydroxy-1-carboxy-naphthoate (CxTA 2,1 HCN, x = 16.14 or 12) [2]. With increasing counter-ion surfactant ratio r we observed transition from the isotropic L1-phase to multilamellar vesicles (MLV) La-phase. The single phases are separated by a two phase L1/L alpha region. The phases were characterized with FF-TEM, rheological and SANS measurements. For 100mM solution of either C8TAOH/2,1 HNC or C10TAOH/2,1 HNC, both MLV phases behave like a weak gel and have a yield stress value. It is thus shown that it is possible to prepare viscoelastic surfactant solutions with a small yield stress value from single chain surfactants with decyl or octylchain. |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=3217 |
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 44, N° 3/2007 (06-07/2007) . - p. 168-175
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Formation of multilamellar vesicles in the systems of decyltrimethylammonium hydroxides/2-hydroxy 1-carboxynaphthoate and octyltrimethylammonium hydroxides/2-hydroxy 1-carboxynaphthoate in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 44, N° 3/2007 (06-07/2007)
