MEASUREMENTS OF STRUCTURAL AND ELECTROSTATIC PARAMETERS AND SURFACE-TENSION OF MICELLES OF AN IONIC SURFACTANT VERSUS CONCENTRATION, IONIC-STRENGTH OF SOLUTION AND TEMPERATURE BY SMALL-ANGLE NEUTRON-SCATTERING

Authors
BULAVIN LA GARAMUS VM KARMAZINA TV PIVNENKO EN
Citation
La. Bulavin et al., MEASUREMENTS OF STRUCTURAL AND ELECTROSTATIC PARAMETERS AND SURFACE-TENSION OF MICELLES OF AN IONIC SURFACTANT VERSUS CONCENTRATION, IONIC-STRENGTH OF SOLUTION AND TEMPERATURE BY SMALL-ANGLE NEUTRON-SCATTERING, Colloids and surfaces. A, Physicochemical and engineering aspects, 131(1-3), 1998, pp. 137-144
Citations number
26
Categorie Soggetti
Chemistry Physical
Journal title
Colloids and surfaces. A, Physicochemical and engineering aspects → ACNP
ISSN journal
09277757
Volume
131
Issue
1-3
Year of publication
1998
Pages
137 - 144
Database
ISI
SICI code
0927-7757(1998)131:1-3<137:MOSAEP>2.0.ZU;2-7
Abstract
Micellar solutions of the cationic surfactant 1-bromo-4-tridecylpyridi ne in water and sodium bromide-water were studied by small-angle neutr on scattering. The data were modelled for two-shell ellipsoids with a screening Coulomb potential. The dependences of micellar aggregation n umber, fractional charge, electrical charge and surface Coulomb potent ial on surfactant concentration, ionic strength of the solution and te mperature were obtained. The micellar electrical charge decreases with increasing ionic strength of the solution but does not change with in creasing temperature. The changes in the Gibbs free energy and the val ue of surface tension of the micellar surface (similar to 0.5 mN m(-1) ) were determined. (C) 1998 Elsevier Science B.V.