Micellar and Thermodynamic Properties of Sodium Dodecyl Sulfate in Binary Aqueous Solutions of Di-, Tri-, and Tetraethylene Glycols

✍ Scribed by Dale Turner; Kim Gracie; Trudy Taylor; R. Palepu

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 204 KB
• Volume: 202
• Category: Article
• ISSN: 0021-9797
• DOI: 10.1006/jcis.1998.5484

✦ Synopsis

London-dispersion interactions as the driving force for the Thermodynamic and micellar properties of sodium dodecyl sulmicellization process (3,4). The satisfactory way to investifate in aqueous solutions of di-, tri-, and tetraethylene glycols were gate the effect of hydrophobic interaction on ionic micelle determined employing conductivity, potentiometric, and fluoresformation would be to study the micellar properties of ionic cence spectroscopic techniques. Intermicellar properties such as surfactants in altered water structure by adding alcohols of effective degree of dissociation, monomer and counter ion concenvarying chain length. All substances containing hydrophobic trations, and activity coefficients were obtained from the mass moities decrease the hydrophobic effect, that is, it would action model. From the evaluated intermicellar parameters, the decrease the standard chemical potential of the monomer for hydrophobic and electrostatic contributions to Gibbs free energy the micelle-forming amphiphile without any effect on the of micellization were evaluated. The difference in Gibbs energies of micellization of SDS between water and mixed solvent systems standard chemical potential of the micelle and would thereand the results were also interpreted in terms of hydrophobic and fore increase the cmc. If alcohols are dissolved in water, electrostatic contributions to the micellization process. Surfactant the solvent hydrophobicity will increase. This results in an aggregation numbers (N agg ) obtained from the fluorescence increase of the critical micellar concentration because the quenching method decrease with increasing glycol content in the micellization energy gained by the system decreases. This solvent composition. The micropolarity of the micellar interior was is the case when adding short chain alcohols. Following the determined from the pyrene I 1 /I 3 ratios.