Premicellar aggregation in water–salt solutions of sodium alkyl sulfonates and dodecyl sulfate

• Published in: Colloid journal of the Russian Academy of Sciences Vol. 78; no. 5; pp. 647 - 651
• Main Authors: Reshetnyak, E. A., Chernyshova, O. S., Mchedlov-Petrosyan, N. O.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-09-2016; Springer Nature B.V
• Subjects: Aqueous solutions; Chemistry; Chemistry and Materials Science; Electrical measurement; Micelles; Polymer Sciences; Potentiometric analysis; Saline solutions; Sodium; Stability constants; Sulfonates; Surfaces and Interfaces; Surfactants; Thin Films
• ISSN: 1061-933X; 1608-3067
• DOI: 10.1134/S1061933X16050124

The features of premicellar aggregation in aqueous solutions of sodium
n
-octyl,
n
-nonyl, and
n
-decyl sulfonate, as well as sodium
n
-dodecyl sulfate, at a constant ionic strength maintained by adding NaCl are studied by potentiometry using modified ion-selective electrodes reversible with respect to the ions of these surfactants. For the studied surfactants, the critical micelle concentrations are refined, the compositions of the products of premicellar aggregation are determined, and the stability constants of aggregates are evaluated.