MICELLIZATION OF FLUOROCARBON SURFACTANTS IN MIXTURES OF WATER AND POLAR-SOLVENTS

Micellization of anionic and cationic fluorocarbon surfactants in mixt ures of ethylene glycol/H2O and ethanol/H2O has been investigated by m easuring surface tension and absorption spectra of a dye. The critical micelle concentration (CMC) values of both surfactants determined fro m the surface tension measurement decrease and then increase with an i ncrease of ethylene glycol or ethanol concentration in the mixtures. I n higher concentrations of ethanol, in which the CMC can not be determ ined from the surface tension measurement, the dye method is useful to estimate the CMC of both surfactants.