Determination by activity data of micellar aggregation number around CMC

The Gibbs-Duhem equation, which takes intermicellar interaction into consideration, shows the relation between the activity of free ions and the weight average aggregation number of the micelles. This relation, leading to the respective aggregation numbers of counterions and surfactant ions per mice...

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Bibliographic Details
Published inJournal of colloid and interface science Vol. 112; no. 2; pp. 544 - 547
Main Author Akisada, Hideo
Format Journal Article
LanguageEnglish
Published San Diego, CA Elsevier Inc 01.08.1986
Elsevier
Subjects
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Micelles. Thin films
Aggregation
Anionic surfactant
Micellar critical concentration
Investigation method
Thermodynamic activity
Micelle
Counter ion
Surfactant
Fatty acids
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Summary:The Gibbs-Duhem equation, which takes intermicellar interaction into consideration, shows the relation between the activity of free ions and the weight average aggregation number of the micelles. This relation, leading to the respective aggregation numbers of counterions and surfactant ions per micelle on the basis of activity data, is applied to a sodium decanoate system. By this application, a remarkable change in the micellar average aggregation number with the total surfactant concentration around the CMC and a broad, micellar size distribution were found.
ISSN:0021-9797
1095-7103
DOI:10.1016/0021-9797(86)90124-4