INVESTIGADORES
FERNANDEZ LEYES Marcos Daniel
artículos
Título:
Homologous mixed micellar systems with non-ideal and asymmetric thermodynamic behavior
Autor/es:
PEREYRA, ROMINA B.; DURAND, GUILLERMO A.; FERNÁNDEZ LEYES, MARCOS; RITACCO, HERNÁN; SCHULZ, ERICA P.
Revista:
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Año: 2020 vol. 594
ISSN:
0927-7757
Resumen:
Mixtures of different kinds of homologous surfactants (potassium soaps, alkyltrimethylammonium bromides, alkylammonium chlorides, alkylsulfinyl ethanols and tritons) have been studied contemplating the peculiarities of each case. Two aggregation behaviors at low total molar fractions of the more hydrophilic surfactant at the mixture CMChave been identified:one-step micellizationwithmixed micelles with a relative large proportion of the more hydrophilic surfactant in the mixed micelles, andtwo-stepsmicellizationwithmicelles with a very low proportion of the morehydrophilic surfactant, i.e. pure or almost pure micelles of the more hydrophobic component.A recently developed procedure for the thermodynamic analysis, the Equation Oriented Mixed Micellization Model(EOMMM) has been employed evidencing that these systems are not only non-ideal but alsoasymmetric.
