Abstract
Quasielastic light scattering was used to study micellar solutions of sodium dodecyl sulfate (SDS) and dode-cyltrimethylammonium bromide (DTAB). The measurements were performed at low ionic strengths of the solvent, so that the influence of electrostatic interaction on the diffusion of the micelles could not be neglected. In accordance with theoretical models an increase of the diffusion coefficients with increasing surfactant concentration of the solvent was observed at low ionic strengths. As structural parameters of the micelles both the size and the charge of the micelles could be determined as functions of the ionic strength of the solvent. These results are interpreted in terms of a model which describes the size of the micelles as the result of a counterbalance between hydrophobic and electrostatic interactions in ionic micelles.
Original language | English |
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Pages (from-to) | 1598-1602 |
Number of pages | 5 |
Journal | Journal of Physical Chemistry |
Volume | 84 |
Issue number | 12 |
DOIs | |
State | Published - 1980 |
Externally published | Yes |