Critical micelle concentration dependence on head-group size in polyoxyethylene nonionic surfactants

The critical micelle concentrations (CMCs) of a number of nonionic surfactants composed of fatty acids esterified to polyoxyethylene molecules containing large numbers of oxyethylene units ( E) were determined fluorimetrically using 8-anilino-1-naph-thalenesulfonate. These CMCs were found to be two...

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Bibliographic Details
Published inColloids and surfaces Vol. 17; no. 2; pp. 115 - 121
Main Authors Van Alstine, James M., Sharp, K.A., Brooks, Donald E.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 1986
Elsevier
Subjects
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Micelles. Thin films
Ethylene oxide polymer
Micellar critical concentration
Non ionic surfactant
Fluorescence
Micelle
Optical method
Physical method
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Summary:The critical micelle concentrations (CMCs) of a number of nonionic surfactants composed of fatty acids esterified to polyoxyethylene molecules containing large numbers of oxyethylene units ( E) were determined fluorimetrically using 8-anilino-1-naph-thalenesulfonate. These CMCs were found to be two orders of magnitude lower than the values predicted from an extrapolation of log CMC versus E plots derived from literature data on relatively low-molecular-weight homologues. Our results suggest that the CMC values of such surfactants may be better extrapolated from plots of log CMC versus log E.
ISSN:0166-6622
1873-4340
DOI:10.1016/0166-6622(86)80239-6