The gibbs energy,chemical potential,and state parameters of the surface of an ionic micelle in the form of an ellipsoid of revolution |
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Authors: | V S Kuznetsov N V Usol’tseva A P Blinov |
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Institution: | (1) Ivanovo State University, Ivanovo, Russia |
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Abstract: | A molecular-thermodynamic model of an ionic micelle in the form of an ellipsoid of revolution was suggested. Equations for
the chemical potential of an ellipsoidal micelle, the work of transfer of ions from solution volume into the micelle, and
the state parameters of the surface of the micelle (fraction of free hydrophobic surface, surface tension coefficient, and
surface charge density) were obtained. The Gibbs energy, chemical potential, work of transfer, and state parameters of an
ellipsoidal micelle were determined as depending on the form factor of the corresponding ellipsoid. The model was verified
for the example of sodium decyl sulfate micelles. The calculated parameters were close to the thermochemical data on the asymmetrization
of spherical micelles in a solution of sodium decyl sulfate. The equilibrium ion-micellar solution composition was estimated. |
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