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Thermodynamics and Structure of Micelles in Aqueous Solutions of Sodium Decyl Sulfate in the Region of the Third Critical Micelle Concentration

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Abstract

Using data on heat capacity of sodium decyl sulfate solutions near the third critical micelle concentration, obtained earlier via high-precision scanning calorimetry, the temperature dependences are calculated for the thermodynamic functions of the corresponding micellar transition and the components of its Gibbs free energy. It is shown that the considered intermicellar transition, interpreted as the micellar shape transforming from cylindrical to lamellar as the concentration grows, occurs at an equilibrium molality of 0.33 and a temperature of 323 K. Correlations between the thermodynamic functions of the transition with structural changes in the micelles and the key micellar parameters are discussed.

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ACKNOWLEDGMENTS

This work was supported by the Russian Foundation for Basic Research, project no. 15-29-01068 ofi_m.

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Authors and Affiliations

  1. Ivanovo State University, 153025, Ivanovo, Russia

    V. S. Kuznetsov

  2. Ivanovo State Polytechnic University, 153000, Ivanovo, Russia

    V. P. Zherdev

  3. Krestov Institute of Solution Chemistry, Russian Academy of Sciences, 153045, Ivanovo, Russia

    V. G. Badelin

  4. Russian Medical Academy of Postgraduate Education, 125993, Moscow, Russia

    V. V. Zherdeva

Authors
  1. V. S. Kuznetsov
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  2. V. P. Zherdev
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  3. V. G. Badelin
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  4. V. V. Zherdeva
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Corresponding author

Correspondence to V. P. Zherdev.

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Translated by D. Terpilovskaya

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Kuznetsov, V.S., Zherdev, V.P., Badelin, V.G. et al. Thermodynamics and Structure of Micelles in Aqueous Solutions of Sodium Decyl Sulfate in the Region of the Third Critical Micelle Concentration. Russ. J. Phys. Chem. 93, 1471–1477 (2019). https://doi.org/10.1134/S0036024419080156

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  • DOI: https://doi.org/10.1134/S0036024419080156

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