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Studies of the Aggregation Behavior of Cyclic Gemini Surfactants

✍ Scribed by K.M. Jenkins; S.D. Wettig; R.E. Verrall

Publisher: Elsevier Science
Year: 2002
Tongue: English
Weight: 120 KB
Volume: 247
Category: Article
ISSN: 0021-9797
DOI: 10.1006/jcis.2001.8162

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✦ Synopsis

The specific conductance, surface tension, mean aggregation number, and apparent molar volume properties of aqueous solutions of a novel series of N,N'-bis(cyclododecyldimethyl)-alpha,omega-alkanediammonium dibromide (c12-s-c12) surfactants, where s is the spacer chain length, are reported. Surfactants with s = 3, 4, and 6 have been prepared and characterized in terms of their Krafft temperature (T(Kr)), critical micelle concentration (cmc), surfactant head group area (a) at the air-water interface, mean aggregation number (N(agg)), and the volume change upon micelle formation (deltaV(phi,M)). The c12-3-c12 shows little evidence of aggregate formation, while the results obtained for the c12-4-c12 and c12-6-c12 homologues suggest the formation of small, poorly defined micellar aggregates in aqueous solution.

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