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Effect of different solvents on the low-frequency electrical conductivity of water-in-oil microemulsions

  • F. Bordi
  • C. CamettiEmail author
  • A. Di Biasio
  • G. Onori
Surfactant Colloids
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 110)

Abstract

The low-frequency electrical conductivity of water-in-oil micro-emulsions, built up with different solvents (carbon tetrachloride, n-pentane, n-heptane and n-decane), has been measured in the temperature interval from 5 to 60°C, for different values of the water-to-surfactant ratio W, from 2 to 20. The results have been analyzed on the basis of the charge fluctuation theories recently proposed by Eicke, Hall and Halle and the effects of short-range attractive interactions due to surfactant tail interpenetration between two adjacent water droplets have been evaluated.

Key words

Microemulsions electrical conductivity charge fluctuation 

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Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1998

Authors and Affiliations

  • F. Bordi
    • 1
    • 4
  • C. Cametti
    • 2
    • 4
    Email author
  • A. Di Biasio
    • 3
    • 4
  • G. Onori
    • 5
    • 6
  1. 1.Sezione di Fisica Medica Dipartimento di Medicina InternaUniversità di Tor VergataRomeItaly
  2. 2.Dipartimento di FisicaUniversità di Roma “La Sapienza”RomeItaly
  3. 3.Dipartimento di Matematica e FisicaUniversità degli Studi di CamerinoItaly
  4. 4.Istituto Nazionale di Fisica della Materia (INFM) Unitá di Roma IItaly
  5. 5.Dipartimento di FisicaUniversità degli Studi di PerugiaItaly
  6. 6.Istituto Nazionale di Fisica della Materia (INFM) Unitá di PerugiaItaly

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