INVESTIGADORES
MESSINA Paula Veronica
artículos
Título:
The nature of the coacervate formed in the aqueous dodecyltrimetylammonium bromide- sodium 10-undecenenoate mixtures
Autor/es:
MA. BELEN SIERRA ; PAULA V MESSINA; MARCELA A. MORINI; JUAN M. RUSO; GERARDO PRIETO; PABLO C. SCHULZ; FÉLIX SARMIENTO
Revista:
Colloid and Surfaces A: Physicochem. Eng. Aspects
Editorial:
Elsevier
Referencias:
Año: 2006 vol. 277 p. 75 - 82
ISSN:
0927-7757
Resumen:
The formation of a coacervate in mixtures of dodecyltrimethylammonium bromide (DTAB)?sodium 10-undecenoate (SUD) aqueous mixtures was studied by light scattering, ζ potential measurements, and electronic microscopy. The coacervate appears when the ζ 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 micelles?coacervate in the opposite sides of the two-phase region.
