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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 / R. Abdel-Rahem in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 44, N° 3/2007 (06-07/2007)
[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[article]Réservation
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