Surface and colloid properties of cyclic amides III. Surface activity and micellization of N-butyl-2-pyrrolidone in water

The aggregation and surface activity of N-butyl-2-pyrrolidone (BP) in water is investigated using surface tension, solubilization, fluorescence and NMR methods. The micelle point is high (˜1.0 M) as expected for the butyl chain length, and the aggregation number is approximately 5, with pre-associat...

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Bibliographic Details
Published in:Journal of dispersion science and technology 1999-01, Vol.20 (1-2), p.569-580
Main Authors: Lou, Anjing, Pethica, Brian A., Somasundaran, P., Fan, Aixing
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Micelles. Thin films
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Summary:The aggregation and surface activity of N-butyl-2-pyrrolidone (BP) in water is investigated using surface tension, solubilization, fluorescence and NMR methods. The micelle point is high (˜1.0 M) as expected for the butyl chain length, and the aggregation number is approximately 5, with pre-association below the c.m.c. Despite the low aggregation number, the fluorescence data indicate that the interior of the aggregate is similar to pure liquid BP. The adsorption of BP at the solution/air interface goes to a maxmum near the c.m.c, corresponding to an area of 45 ± 1 Å 2 /molecule.
ISSN:0193-2691
1532-2351
DOI:10.1080/01932699908943808