Abstract
The effect of acidity on micellization in aqueous solutions of dodecyldimethylamine oxide-sodium dodecyl sulfate mixtures is studied. The CMC values are determined for acidic and nonacidified solutions at 50 °C and different ratios of two surfactants. The measurements are taken using potentiometry, conductometry, and tensiometry techniques. The CMC values are calculated within the framework of a quasi-chemical model of micellization modified with regard to the specific features of the system under consideration. Nonacidified solutions are modeled as a mixture of anionic and nonionic surfactants, whereas acidic solutions are treated as a mixture of anionic and cationic surfactants. The results of model calculations are in satisfactory agreement with the experimental data.
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Original Russian Text © E.A. Safonova, M.V. Alexeeva, N.A. Smirnova, 2009, published in Kolloidnyi Zhurnal, 2009, Vol. 71, No. 5, pp. 704–711.
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Safonova, E.A., Alexeeva, M.V. & Smirnova, N.A. The effect of acidity on micellization in dodecyldimethylamine oxide-sodium dodecyl sulfate aqueous mixtures. Colloid J 71, 717–724 (2009). https://doi.org/10.1134/S1061933X09050202
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DOI: https://doi.org/10.1134/S1061933X09050202