title: Mixed micelles formed by n-octyl-beta-D-glucopyranoside and tetradecyltrimethylammonium bromide in aqueous media.
abstract: Speed of sound, density, conductivity, and fluorescence spectroscopy experiments were run to analyze the mixed aggregation process of a nonionic-cationic surfactant system in aqueous media at 298.15 K. The mixed system comprises a nonionic surfactant, n-octyl-beta-D-glucopyranoside (OBG), and a cationic surfactant, tetradecyltrimethylammonium bromide (C14TAB), with 8 and 14 carbon atoms on the hydrophobic tails, respectively. From these data, the total and partial critical micellar concentrations, the total and partial aggregation numbers, apparent molar volumes and isentropic compressibilities, hydration numbers, and the corresponding changes in the latest properties due to the mixed aggregation process were determined. Pure and mixed micelles were analyzed from a geometrical point of view by determining the packing parameter of the aggregates. Furthermore, the experimental characterization of both the monomeric and micellar phases was completed with a theoretical study of the mixed micellization phenomena studied herein, by means of some of the most relevant theoretical models.
authors.affiliation: Departamento de Química Física I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040-Madrid, Spain.
authors.forename: Alfredo
authors.initials: A
authors.lastname: Lainez
authors.forename: Patricia
authors.initials: P
authors.lastname: del Burgo
authors.forename: Elena
authors.initials: E
authors.lastname: Junquera
authors.forename: Emilio
authors.initials: E
authors.lastname: Aicart
mesh_terms: D004553:Electric Conductivity; D005960:Glucosides / Q000737:chemistry*; D008823:Micelles; D012680:Sensitivity and Specificity; D013050:Spectrometry, Fluorescence; D013816:Thermodynamics; D050337:Trimethyl Ammonium Compounds / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D005960:Glucosides; D008823:Micelles; D050337:Trimethyl Ammonium Compounds; D014867:Water; C018619:octyl-beta-D-glucoside; C009410:tetradecyltrimethylammonium