STRUCTURAL, ELECTROSTATIC AND THERMODYNAMICPROPERTIES OF THE SURFACE OF SPHERICAL MICELLESIN SOLUTIONS OF SODIUM n-ALKYL SULFATE HOMOLOGUES. I. STRUCTURAL CHARACTERISTICS
a:2:{s:4:"TYPE";s:4:"HTML";s:4:"TEXT";s:168:"V. S. Kuznetsov1, N. V. Usol’tseva1, A. P. Blinov1, N. V. Zharnikova1, A. I. Smirnova1, V. G. Badelin2";}
1Ivanovo State University, Ivanovo, Russia
2Krestov Institute of Solution Chemistry, Russian Academy of Sciences, Ivanovo, Russia
Keywords: ионные сферические мицеллы, структура поверхности, двойной электрический слой, числа агрегации, ionic spherical micelles, surface structure, electric double layer, aggregation numbers
Abstract
Using the aggregation numbers of micelles and the effective sizes of hydrated surfactant ions and counterions of the first coordination sphere, we calculated the average geometric characteristics of the surface layer of ionic spherical micelles in solutions of the sodium n -alkyl sulfate homologues with n C = 8, 10, 12, and 14 carbon atoms in the molecule; in particular, we established 1) the size of the micelle core; 2) the thickness of the electrical double layer on the surface; 3) the mutual arrangement parameters of hydrophilic and hydrophobic ions; 4) the number of “free” water molecules and showed their dependence on the homologue number and the degree of binding of counterions.
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