INVESTIGADORES
SIERRA Maria belen
artículos
Título:
The nature of the coacervate formed in the aqueous dodecyltrimethylammonium bromide sodium 10-undecenoate mixtures.
Autor/es:
MARÍA BELÉN SIERRA, PAULA V. MESSINA, MARCELA A. MORINI, JUAN M. RUSO, GERARDO PRIETO, PABLO C. SCHULZ, FÉLIX SARMIENTO.
Revista:
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Editorial:
ELSEVIER
Referencias:
Año: 2006 vol. 277 p. 75 - 82
ISSN:
0927-7757
Resumen:
Abstract
The formation of a coacervate in mixtures of dodecyltrimethylammonium bromide (DTAB)sodium 10-undecenoate (SUD) aqueous mixtures
was studied by light scattering, æ potential measurements, and electronic microscopy. The coacervate appears when the æ potential goes to zero,
and the energy barrier against agglomeration disappears, promoting the agglomeration of micelles. Rod-like micelles agglomerate in bundles in the
DTAB-rich side of the phase diagram, while spherical or globular micelles agglomerate in clusters in the SUD-rich side. This difference explains
the differences in the transition micellescoacervate in the opposite sides of the two-phase region.
© 2005 Elsevier B.V. All rights reserved.æ potential measurements, and electronic microscopy. The coacervate appears when the æ potential goes to zero,
and the energy barrier against agglomeration disappears, promoting the agglomeration of micelles. Rod-like micelles agglomerate in bundles in the
DTAB-rich side of the phase diagram, while spherical or globular micelles agglomerate in clusters in the SUD-rich side. This difference explains
the differences in the transition micellescoacervate in the opposite sides of the two-phase region.
© 2005 Elsevier B.V. All rights reserved.
Keywords: Coacervate; Dodecyltrimethylammonium bromide; Sodium 10-undecenoate; Catanionic mixtures; Mixed surfactantsCoacervate; Dodecyltrimethylammonium bromide; Sodium 10-undecenoate; Catanionic mixtures; Mixed surfactants