Colloid and Polymer Science

, Volume 266, Issue 10, pp 954–957 | Cite as

Counterion binding on mixed anionic/cationic micelles

  • N. Filipović-Vinceković
  • D. Škrtić
Colloid Science


Measurements of counterion binding in mixtures of surfactant aqueous solutions have been performed to study the structure of the anionic/cationic mixed micelle/solution interface. The mixtures studied were SDS/DDAC and STS/TDPC. The binding of chloride and sodium ions to mixed anionic/cationic micelles was measured using ion-specific electrodes. Counterion binding was found to be strongly dependent on the molar ratio of surfactants present. The mixed micelle/solution interface includes the headgroups of both surfactants and counterions of surfactant in excess. The addition of oppositely charged surfactant caused an increasing dissociation of counterions.

Key words

Surfactant aqueous solutions mixtures of surfactants structure of interfaces counterion binding 


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Copyright information

© Steinkopff 1988

Authors and Affiliations

  • N. Filipović-Vinceković
    • 1
  • D. Škrtić
    • 1
  1. 1.Ruder Bošković InstituteZagrebYugoslavia

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