Preu, Harald and Schirmer, Christine and Tomsic, Matija and Rogac, Marija Bešter and Jamnik, Andrej and Belloni, Luc and Kunz, Werner (2003) Light, neutron, X-ray scattering, and conductivity measurements on aqueous dodecyltrimethylammonium bromide/1-hexanol solutions. JOURNAL OF PHYSICAL CHEMISTRY B, 107 (50). pp. 13862-13870. ISSN 1520-6106, 1520-5207
Full text not available from this repository.Abstract
Ternary systems of dodecyltrimethylammonium bromide (C(12)TAB)/1-hexanol/water are examined for series with constant surfactant to alcohol molar ratios of n(s)/n(a) = 8:2, 8:4, 8:6, and 8:8 at surfactant concentrations of c = 6.167-61.67 g/L (0.02-0.20 mol/L). The methods used are conductivity measurements, differential refractometry, static and dynamic light scattering, small-angle neutron scattering, and X-ray scattering. Critical micelle concentrations (cmc) and the degree of dissociation of the micelles are determined by conductivity measurements. The refractive index increment is given for each series as well as static and dynamic light-scattering intensities plotted as a function of the surfactant concentration. From small-angle neutron-scattering experiments a detailed picture of the size and the geometry of the micelles could be obtained, whereas small-angle X-ray scattering allowed information about the thickness of the interfacial film to be inferred. A hypernetted chain calculation with solvent plus ion-averaged screened Coulombic potentials combined with an ellipsoidal core/shell model permitted a simultaneous and coherent description of all scattering results.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CRITICAL MICELLE CONCENTRATIONS; CATIONIC SURFACTANTS; RAYLEIGH RATIO; DTAB MICELLES; PURE LIQUIDS; SYSTEMS; BROMIDE; RELAXATION; COUNTERION; DIFFUSION; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Physikalische und Theoretische Chemie > Chair of Chemistry VI - Physical Chemistry (Solution Chemistry) > Prof. Dr. Werner Kunz |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Jul 2021 09:47 |
| Last Modified: | 27 Jul 2021 09:47 |
| URI: | https://pred.uni-regensburg.de/id/eprint/38307 |
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