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Thermodynamics of thin liquid films

I. Basic relations and conditions of equilibrium

  • Colloid Science
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Summary

The conditions for equilibrium between a thin liquid film and its environment are investigated. It is shown that the pressure in the film and the gas phase are equal while between the film and the meniscus a pressure difference exists — the so-called disjoining pressure. Eq. [1.43] is a tangential condition for equilibrium between the film and the meniscus surface. Using theGibbs' method, a general thermodynamical theory of thin films is derived.

Zusammenfassung

Die Bedingungen für Gleichgewicht zwischen einem dünnen flüssigen Film und seiner Umgebung wurden untersucht. Es wurde gezeigt, daß der Druck in dem Film und in der Gasphase gleich sind, während zwischen dem Film und dem Meniskus ein Druckunterschied besteht — der sogenannte Spaltdruck. Gleichung [I.43] ist die tangentiale Bedingung für Gleichgewicht zwischen dem Film und der Meniskusoberfläche. Mit der Hilfe der Methode vonGibbs wurde eine allgemeine thermodynamische Theorie des dünnen flüssigen Filmes aufgebaut.

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Authors and Affiliations

  1. Department of Physical Chemistry, Faculty of Chemistry, University of Sofia, 1, Anton Ivanov ave., 1126, Sofia, Bulgaria

    B. V. Toshev &  I. B. Ivanov

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  1. B. V. Toshev
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  2. I. B. Ivanov
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Toshev, B.V., Ivanov, I.B. Thermodynamics of thin liquid films. Colloid & Polymer Sci 253, 558–565 (1975). https://doi.org/10.1007/BF01753959

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