BEHAVIOR OF ANIONIC SURFACTANT MICELLES IN THE PRESENCE OF Al3+ AND Ca2

The estimation of the C-potential of ionic surfactant micelles may be useful for the study of adsorption of solutes onto the micellar surface, which causes a reduction of the net electrostatic charge. This work presents results on the variation of ζ-potential of alkylsulfate and fatty carboxylate mi...

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Bibliographic Details
Published in:Journal of dispersion science and technology 1999-12, Vol.20 (7), p.1861-1871
Main Author: Talens-Alesson, Federico I.
Format: Article
Language:English
Subjects:
adsorption
Chemistry
Colloidal state and disperse state
Exact sciences and technology
flocculation
General and physical chemistry
micelle
Micelles. Thin films
Schulze-Hardy
ζ-potential
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Summary:The estimation of the C-potential of ionic surfactant micelles may be useful for the study of adsorption of solutes onto the micellar surface, which causes a reduction of the net electrostatic charge. This work presents results on the variation of ζ-potential of alkylsulfate and fatty carboxylate micelles with the bulk concentrations of Al 3+ and Ca 2+ cations. Combined with results from the literature about the effect of micellar surfactant concentration on reducing surfactant precipitation in the presence of polyvalent cations, these allow to conclude that micelles of anionic surfactants will have a higher chance of electroneutralization of their surface charge by adsorbing cations if the end functional group of the surfactant is smaller.
ISSN:0193-2691
1532-2351
DOI:10.1080/01932699908943895