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Abstract
The synthesis and micellar properties of alkyl cationic surfactants based on dimethyl and diethyl ethanol amines have been investigated using conductometric and fluorimetric techniques. The critical micelle concentration (cmc) and degree of counterion binding was determined as a function of temperature. Employing mass action model the relative contribution of hydrophobic and surface energy to Gibbs energy of micellization, degree of counterion binding, and the monomer concentration in the post‐micellar region were evaluated. The aggregation numbers were determined employing fluorimetric techniques. The micellar properties of these series of surfactants were compared with their corresponding trimethyl and triethyl ammonium series to evaluate the effect of substitution of a hydroxyethyl group in place of either a methyl or ethyl group in the head group.
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