Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 298, Issue 3, Pages 177-185Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2006.10.062
Keywords
CTAB; CTEAB; CTPAB; CTBAB; water-ethylene glycol; micellization
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Micellization of cetyltrialkylammonium bromide (alkyl = methyl, ethyl, propyl, and butyl) surfactants has been studied in various water-ethylene glycol, EG, mixtures. This study provided the opportunity of investigating how, for a given hydrophobic tail length, the head group size determines the effect of the addition of EG on the micellization process. Conductivity, surface tension, spectroscopic and steady-state fluorescence measurements were carried out. The influence of additional methylenes in the headgroups on the Gibbs energy of micellization, A G, was found to derive from changes in the solvophobic Gibbs energy contribution and from variations in the electrostatic headgroups interaction contribution. (c) 2006 Elsevier B.V. All rights reserved.
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