SOLUBILIZATION OF PHENOL AND BENZYL ALCOHOL BY CATIONIC AND ANIONIC SURFACTANT MICELLES

The solubilization of phenol and benzyl alcohol by the micelles of a c ationic surfactant, cetyltrimethyl ammonium bromide (CTAB), and an ani onic surfactant, lithium dodecyl sulfate (LDS), was studied as a funct ion of surfactant concentration. The critical micelle concentrations ( CMCs) of the two surfactants in the presence of small amounts of these additives were determined by a conductivity method at 25 degrees C. T he micelle-water partition coefficient, K-x, and the standard free ene rgy change of transfer, Delta G(p)(o) of each additive from water to m icelles were also calculated. K-x and Delta G(p)(o) of phenol and benz yl alcohols between bulk water and CTAB micelles were also determined by a differential spectroscopic method at 25 degrees C.