Effect of aqueous alcoholic solvents on counterion binding to CTAB micelles

Journal Article · Tue Oct 01 04:00:00 EDT 1974 · J. Colloid Interface Sci.; (United States)

DOI:https://doi.org/10.1016/0021-9797(74)90305-1· OSTI ID:5072382

Larsen, J W; Tepley, L B

Two theories have been proposed to explain the effects of alcohols on micelles: on dealing primarily with the solubilization of alcohols in micelles and the other with the effects of the alcohols on the solvent structure. In an effort to shed more light on the effects of alcohol solutes on micelles, the authors examined the effect of methanol, ethanol, isopropanol, and t-butanol on the degree of dissociation of micelles over a wide range of alcohol concentration. At low alcohol concentrations, the alteration of micelle structure caused by solubilization of the alcohols is more important than the effects due to modification of the water structure by the alcohols, as indicated by a decrease in the amount of Br/sup -/ bound to CTAB micelles as the alcohol concentration increases. This behavior undergoes a sudden reversal at 0.1 to 0.2 mole fraction alcohol. The reason for this reversal is not clear. (38 refs.)

• Research Organization: Univ. of Tennessee
• OSTI ID: 5072382
• Journal Information: J. Colloid Interface Sci.; (United States), Journal Name: J. Colloid Interface Sci.; (United States) Vol. 49:1; ISSN JCISA
• Country of Publication: United States
• Language: English

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