Mixing Behavior of Cationic Hydrotropes with Anionic Surfactant Sodium Dodecyl Sulfate

Abstract

Mixing behavior of anionic surfactant sodium dodecyl sulfate (SDS) with cationic hydrotropes aniline hydrochloride (AH), o-toluidine hydrochloride (o-TH), and p-toluidine hydrochloride (p-TH) have been studied using conductivity at different temperatures. Critical micelle concentration for different mixing mole fractions, their ideal values, and different interaction parameters have been estimated. All the parameters show nonideal behavior with synergistic interactions. Thermodynamic parameters are also calculated for these systems.

Keywords:

• Cationic hydrotropes
• conductivity
• interaction parameters
• sodium dodecyl sulfate
• thermodynamic parameters

Acknowledgments

The authors acknowledge the fellowships and financial support from UGC, New Delhi (No. F.4-2/2006(BSR)/13-13/2008(BSR)) and Universiti Sains Malaysia, Malaysia.