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    Effects of glycols on the thermodynamic and micellar properties of TTAB in water

    Year: 2009

    Journal: Journal of Colloid and Interface Science, Volume 338, Issue 1, 1 October 2009, Pages 207-215, 20111221

    Authors: Amalia Rodrigueza, Maria del Mar Graciania, Gaspar Fernándeza and Maria Luisa Moyá

    Organizations: Departamento de Qui´mica Fi´sica, Universidad de Sevilla, C/ Profesor Garci´a González 1, 4112 Sevilla, Spain

    Aggregation of tetradecyltrimethylammonium bromide, TTAB, in mixed solvent systems containing ethylene glycol, EG, 1,2-propylene glycol, 1,2-PROP, 1,3-propylene glycol, 1,3-PROP, and tetraethylene glycol, TEG, has been investigated by employing conductivity and fluorescence methods. Gibbs energies of micellization were determined in order to evaluate the effects of the co-solvent on the aggregation process. Information about the influence of the organic solvent on the surfactant adsorption at the air-solution interface, on the micellar size and on the polarity of the micellar interfacial region was obtained by means of surface tension and fluorescence measurements. The study of the reaction methyl naphthalene-2-sulfonate + Br- in the water–glycol TTAB micellar solutions provided information about the characteristics of TTAB micelles as microreactors in the water–solvent binary mixtures.