Interactions of Cationic Surfactant CTAB with Amino Acid Glycine at Different Temperatures by Conductance Measurement

Abstract

The interaction behavior of Cetyl trimethyl ammonium bromide (CTAB) with aqueous solution containing 0.02M amino acid glycine has been studied conductometrically at 298.15K, 303.15K, 308.15K, 313.15K, 318.15K, 323.15K temperatures. The critical micelle concentration (CMC), Average degree of ionization (α), Degree of Counter-ion binding (β), Gibb’s Free Energy of Micellization( ), Enthalpy of Micellization ( ), Entropy of Micellization( ) for the present systems were explored at various temperatures. The combination of CTAB-Glycine favors the micellization over aqueous solution of CTAB. The value of Average degree of ionization decreases in presence of glycine indicates that glycine becomes more strongly bound to the micellar surface.