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Auteur M. Gradzielski |
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Control of rheological behaviour with oppositely charged polyelectrolyte surfactant mixtures / I. Hoffmann in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 48, N° 6 (11-12/2011)
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Titre : Control of rheological behaviour with oppositely charged polyelectrolyte surfactant mixtures Type de document : texte imprimé Auteurs : I. Hoffmann, Auteur ; S. Prévost, Auteur ; M. Medebach, Auteur ; S. Rogers, Auteur ; N. J. Wagner, Auteur ; M. Gradzielski, Auteur Année de publication : 2011 Article en page(s) : p. 488-494 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Diffusion aux petits angles
Polyélectrolytes
Rhéologie
SurfactantsIndex. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Mixtures of the cationic, cellulose based polyelectrolyte JR 400 and the anionic surfactant sodium dodecylbenzene sulfonate (LAS) have been used to control the rheological behaviour of aqueous solutions. Around charge equilibrium precipitation takes place, but both for the surfactant-rich and the polymer-rich side homogeneous solutions are formed. In these monophasic regions the rheology depends strongly on the mixing ratio between the two components and highly viscous systems can be obtained on the polyelectrolyte rich side upon the addition of relatively small amounts of surfactant. Here the viscosity increases by more than four orders of magnitude before reaching the phase boundary of precipitation. Small-angle neutron scattering (SANS) showed the formation of an interconnected network of rodlike aggregates composed of a polyelectrolyte/surfactant complex, which explains the observed high viscosity due to the high degree of interconnection by the polyelectrolyte. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12618
in TENSIDE, SURFACTANTS, DETERGENTS > Vol. 48, N° 6 (11-12/2011) . - p. 488-494[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 13463 - Périodique Bibliothèque principale Documentaires Disponible Dynamics of formation of vesicles studied by highly time-resolved stopped-flow experiments / A. Barth in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 47, N° 5/2010 (09-10/2010)
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Titre : Dynamics of formation of vesicles studied by highly time-resolved stopped-flow experiments Type de document : texte imprimé Auteurs : A. Barth, Auteur ; I. Grillo, Auteur ; M. Gradzielski, Auteur Année de publication : 2010 Article en page(s) : p. 300-306 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Surfactants Tags : Surfactant 'Méthode d'écoulement arrêté' Vésicule Microémulsion 'Additif semi polaire' 'Cinétique de formation' Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Phase behaviour and static structure of surfactant systems have been studied in much detail, but this applies much less so to their dynamic properties. Structural transitions in amphiphilic systems can be triggered by mixing different amphiphiles. Employing the stopped-flow technique we have studied the kinetics of formation of multilamellar vesicles starting from a micellar solution and a microemulsion containing a semipolar oil. This process has been investigated for various starting conditions and as a function of the charging of the amphiphilic system. The formation process is the faster the closer the starting solution is in composition to the final state and can be slowed down by the presence of ionic surfactant. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=9956
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Code-barres Cote Support Localisation Section Disponibilité 012471 - Périodique Bibliothèque principale Documentaires Disponible