Il Nuovo Cimento D

, Volume 16, Issue 9, pp 1613–1618 | Cite as

Evidence of ionic adsorption on C12E6 non-ionic micellar solutions

  • G. Briganti
  • A. Bonincontro


In this paper we present conductivity measurements on different concentrations of C12E6 non-ionic surfactant solutions as a function of temperature and buffer ionic strength. The experimental data were analysed by means of Looyenga equation. The isothermal slopes of the linearized Looyenga equation depend on the ionic strength, showing saturation effect. Our results indicate that one of the basic hypotheses of the mixture equations is not fulfilled. Adsorption of light ions at micellar interface is necessary to justify the experimental data. Then for non-ionic surfactant solutions the ion adsorption prevents any explicit computation of the micellar hydrated volume.

PACS 68.35.Md

Surface energy thermodynamic properties 

PACS 77.20


PACS 01.30.Cc

Conference proceedings 


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Copyright information

© Società Italiana di Fisica 1994

Authors and Affiliations

  • G. Briganti
    • 1
  • A. Bonincontro
    • 1
  1. 1.Dipartimento di FisicaUniversità «La Sapienza»RomaItaly

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