Characterization of Binary Surfactant Mixtures (Cetylpyridinium Chloride and Tween 60) in an Aqueous Medium

Abstract

Micellar properties of the binary surfactant mixtures of cetylpyridinium chloride (CPC) and polyoxyethylene (20) sorbitan monostearate (Tween‐60) have been investigated in detail using tensiometric, conductometric, spectrophotometric, and fluorimetric techniques. The critical micelle concentration (CMC), counterion binding, interfacial adsorption, energetics of micellization, and micellar dielectric constant have been evaluated. The theories of Clint, Motomura, Rubingh, and Sarmoria, Puvvada and Blankschtein have been followed to understand the CMC, composition, activity coefficients, and synergism of the binary surfactant systems.

Keywords:

• Mixed micelles
• CPC
• Tween‐60
• Safranine T
• Characterizations and interaction parameters

Acknowledgment

Authors (P. K. K) and (S. K. G) thank the authority of Jadavpur University for giving them permission for carrying research work in the laboratory of Department of Chemistry.