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Physico‐chemical and Spectroscopic Approach to Analyse the Behaviour of Surface‐Active Ionic Liquid and Conventional Surfactant in Aqueous Glycine
Author(s) -
Chauhan Suvarcha,
Kumar Ashish,
Kaur Maninder,
Chauhan M. S.
Publication year - 2017
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-017-1993-1
Subject(s) - chemistry , aqueous solution , counterion , micelle , pulmonary surfactant , salting out , cloud point , glycine , inorganic chemistry , sodium , salt (chemistry) , organic chemistry , ion , biochemistry , amino acid
The present work reports a comparison of direct or indirect (water‐mediated) interactions of surface active ionic liquid SAIL, tetrabutylammonium dodecylsulphate (TBADS) in aqueous solutions of glycine with those of sodium dodecylsulphate (SDS) in same solvent system, by employing techniques like conductivity, fluorescence, UV–Vis probe studies and clouding phenomenon. High hydrophobicity and penetrating ability of TBA + counterions and most significant salting‐out effect due to the preferential hydration of glycine molecules accounts for the enhanced micellization and better surface activity of TBADS as compared to its conventional analogue SDS. Further, driving force for the micellization in both the cases is the hydrophobic interactions, whereas in the case of SDS, London dispersion interactions as alternative forces also contribute considerably at higher temperatures. In addition, the decrease in the cloud point ( T cp ) of aqueous TBADS solutions in the presence of glycine is attributed to the dehydration of hydrophilic head groups of micelles, resulting in their collapse and hence phase separation.