Adsorption of ionic surfactants

Two adsorption models for ionic surfactants based on the Frumkin equation are examined to describe the measured surface tension isotherms of a series of alkali dodecylsulphates. In the model A the number of optimization parameters is reduced by additional modeling. The adsorption of counter-ions in...

Full description

Saved in:
Bibliographic Details
Published inColloids and surfaces. A, Physicochemical and engineering aspects Vol. 319; no. 1; pp. 29 - 33
Main Authors Manev, E.D., Sazdanova, S.V., R.Tsekov, Karakashev, S.I., Nguyen, A.V.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Amsterdam Elsevier B.V 15.04.2008
Elsevier
Subjects
Adsorption layers
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Ionic surfactants
Molecular interactions
Surface physical chemistry
Adsorption layers
Molecular interactions
Ionic surfactants
Adsorption
Molecular interaction
Ionic surfactant
Nanotechnology
Online AccessGet full text

Cover

More Information
Summary:Two adsorption models for ionic surfactants based on the Frumkin equation are examined to describe the measured surface tension isotherms of a series of alkali dodecylsulphates. In the model A the number of optimization parameters is reduced by additional modeling. The adsorption of counter-ions in the Stern layer is described via forming of ionic bonds, which free energy is significantly higher than that obtained by the model B. Concurrently the lateral interactions on the water/air interface are also found to be orders of magnitude stronger. Thus, the values of the adsorption parameters are more realistic, which supports the model A as a more relevant one.
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2007.08.022