Interactions of L-alanine with anionic, cationic and nonionic surfactants at different temperatures: A volumetric and viscometric study

Upasna Magotra, Sandarve, Vija

Abstract

Densities,  and viscosities,  of L-alanine (0.02-0.1m) in 0.01m aqueous sodium dodecyl sulphate (SDS) (anionic surfactant), cetyltrimethylammonium bromide (CTAB) (cationic surfactant) and triton X-100 (TX-100) (non-ionic surfactant) solutions have been measured at 298.15, 303.15, 308.15, and 313.15 K. The density data has been utilized to calculate apparent molar volumes, ∅, partial molar volumes at infinite dilution, ∅ ° , its experimental slope,  ∗ and partial molar volumes of transfer, ∅ ° (tr) of amino acids. The viscosity data has been analyzed by means of Jones-Dole equation to obtain Falkenhagen coefficient, A, and Jones-Dole coefficient, B. The above calculated parameters were found to be sensitive towards the interactions prevailing in the studied amino acidsurfactant- water systems. The behavior of these parameters has been used to investigate the solute-solute and solute-solvent interactions