Modification of the Mass Action Law for Reverse Micelles

Two modifications of the mass action law are considered as applied to defining the critical micelle concentration (CMC) via constant K of the law. The first, traditional, modification defines the CMC as where n is the aggregation number, and the second one—as In both cases, the formulation of the ma...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Colloid journal of the Russian Academy of Sciences 2020-07, Vol.82 (4), p.414-420
1. Verfasser: Rusanov, A. I.
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Two modifications of the mass action law are considered as applied to defining the critical micelle concentration (CMC) via constant K of the law. The first, traditional, modification defines the CMC as where n is the aggregation number, and the second one—as In both cases, the formulation of the mass action law is extremely simplified due to the exclusion of the constant, while all concentrations are expressed in the CMC units, which is slightly lower in the second case. The second modification of the law is more adequate at moderate and low aggregation numbers, which are characteristic of reverse micelles; therefore, these two modifications are conditionally attributed to the direct and reverse micelles. For both modifications, the concentrations of micelles and monomers are analyzed as depending on the total surfactant concentration in a micellar solution, while explicit analytical expressions are derived for the inverse dependences. An explicit relation has been found between the aforementioned concentrations and the micellization degree of solution . The dependence of the critical micellization degree (corresponding to CMC) on the aggregation number has been determined.
ISSN:1061-933X
1608-3067
DOI:10.1134/S1061933X20040092