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Evaporation dynamics of a binary sessile droplet: Theory and comparison with experimental data on a droplet of a sulfuric-acid solution

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Abstract

Diffusion evaporation of a sessile binary droplet in an atmosphere of a noncondensable carrier gas has been considered. For a droplet consisting of two infinitely miscible liquids, a relation between the current values of solution concentration and volume of the droplet has been derived in an explicit form under the ideal solution approximation. It has been shown that the volume of a sessile binary droplet may, as well as the volume of a free binary droplet, vary nonmonotonically with time. The evaporation of a droplet of an aqueous sulfuric-acid solution has been considered in detail taking into account the nonideality of the solution. Time variations in the volume, base area, and contact angle have been experimentally measured for the sessile droplet of an aqueous sulfuric-acid solution on a hydrophobized substrate. The experimental data obtained at different initial humidities of water-vapor and droplet-solution concentrations have been analyzed within the theory of the stationary isothermal diffusion evaporation of a sessile binary droplet.

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Authors and Affiliations

  1. St. Petersburg State University, St. Petersburg, 199034, Russia

    A. E. Kuchma, A. A. Mikheev & A. K. Shchekin

  2. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow, 119071, Russia

    N. E. Esipova & S. V. Itskov

Authors
  1. A. E. Kuchma
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  2. N. E. Esipova
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  3. A. A. Mikheev
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  4. A. K. Shchekin
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  5. S. V. Itskov
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Corresponding author

Correspondence to A. E. Kuchma.

Additional information

Original Russian Text © A.E. Kuchma, N.E. Esipova, A.A. Mikheev, A.K. Shchekin, S.V. Itskov, 2017, published in Kolloidnyi Zhurnal, 2017, Vol. 79, No. 6, pp. 747–758.

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Kuchma, A.E., Esipova, N.E., Mikheev, A.A. et al. Evaporation dynamics of a binary sessile droplet: Theory and comparison with experimental data on a droplet of a sulfuric-acid solution. Colloid J 79, 779–787 (2017). https://doi.org/10.1134/S1061933X17060102

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  • DOI: https://doi.org/10.1134/S1061933X17060102

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