The nature of the coacervato formed in the aqueous dodecyltrimethylammonium bromide-sodium 10-undecenoato mixtures

SIERRA, MB, MESSINA, P, MORINI,MA, RUSO,J, PRIETO,G, SCHULZ,P, SARMIENTO,F

Colloid and Surface A

elsevier

Año: 2006 vol. 277 p. 75 - 82

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 micelles–coacervate in the opposite sides of the two-phase region. 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. 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 micelles–coacervate in the opposite sides of the two-phase region.