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Charge reversal at the air/water interface as inferred from the thickness of foam films

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Abstract

Experiments are reported with foam films from aqueous solutions with increasing concentration of a cationic surfactant. A correlation is established between the foam film thickness and the possible variation of diffuse electric layer potential at the air/water interface from a negative value in absence of surfactant to positive values at higher surfactant concentrations. It is concluded that a charge reversal at the air/water interface is expected to occur under increasing concentration of cationic surfactants in aqueous solutions.

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Author notes

  1. T. Kolarov

    Present address: Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1040, Sofia, Bulgaria

Authors and Affiliations

  1. Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1040, Sofia, Bulgaria

    R. Yankov & D. Exerowa

  2. Institute of Physical Chemistry, Russian Academy of Sciences, 1040, Moscow, Russia

    N. E. Esipova & Z. M. Zorin

Authors
  1. T. Kolarov
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  2. R. Yankov
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  3. N. E. Esipova
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  4. D. Exerowa
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  5. Z. M. Zorin
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Kolarov, T., Yankov, R., Esipova, N.E. et al. Charge reversal at the air/water interface as inferred from the thickness of foam films. Colloid Polym Sci 271, 519–520 (1993). https://doi.org/10.1007/BF00657398

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  • DOI: https://doi.org/10.1007/BF00657398

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