Micellar and Thermodynamic Properties of Sodium Dodecyl Sulfate in Binary Aqueous Solutions of Di-, Tri-, and Tetraethylene Glycols
| Autor: | Trudy A. Taylor, Kim Gracie, Dale Turner, R. Palepu |
|---|---|
| Rok vydání: | 1998 |
| Předmět: |
chemistry.chemical_classification
Activity coefficient Aqueous solution Potentiometric titration Inorganic chemistry Surfaces Coatings and Films Electronic Optical and Magnetic Materials Gibbs free energy Biomaterials chemistry.chemical_compound symbols.namesake Colloid and Surface Chemistry Monomer chemistry Pulmonary surfactant symbols Counterion Sodium dodecyl sulfate |
| Zdroj: | Journal of Colloid and Interface Science. 202:359-368 |
| ISSN: | 0021-9797 |
| DOI: | 10.1006/jcis.1998.5484 |
| Popis: | Thermodynamic and micellar properties of sodium dodecyl sulfate in aqueous solutions of di-, tri-, and tetraethylene glycols were determined employing conductivity, potentiometric, and fluorescence spectroscopic techniques. Intermicellar properties such as effective degree of dissociation, monomer and counter ion concentrations, and activity coefficients were obtained from the mass action model. From the evaluated intermicellar parameters, the hydrophobic and electrostatic contributions to Gibbs free energy of micellization were evaluated. The difference in Gibbs energies of micellization of SDS between water and mixed solvent systems and the results were also interpreted in terms of hydrophobic and electrostatic contributions to the micellization process. Surfactant aggregation numbers (Nagg) obtained from the fluorescence quenching method decrease with increasing glycol content in the solvent composition. The micropolarity of the micellar interior was determined from the pyreneI1/I3ratios. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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