Abstract
Solubility and critical micelle concentration of dodecylammonium heptafluorobutyrate were determined at various temperatures as a function of ethanol content in a water-ethanol mixture. These were used to draw the phase diagram of the ternary system (H 2O-ethanol-cationic surfactant), with temperature as one of the coordinate axes. The solubility increased with ethanol content of the mixture, and the critical ethanol concentration for micellization was found to correspond to the Krafft temperature for micellization resulting from aqueous solubility increase with temperature. The enthalpy change of dissolution was positive and increased with ethanol content in the mixture from 12.6 in pure water to 46.6 kJ mol −1 in 15.0 wt% ethanol solution.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
