Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

In this work, the surface tensions (a) of aqueous blends of 1-dimethylamino-2-propanol (DMA2P)+amino acid ionic liquids (AAILs) were studied using Wilhelmy plate method at temperatures from (303.2 to 323.2)K and atmospheric pressure. The AAILs include tetramethylammoniumglycinate ([N1111][Gly]), 1-butyl-3-methylimidazolium glycinate ([Bmim][Gly]) and 1-butyl-3-methylimidazolium-L-lysinate ([Bmim][Lys]). The concentration of DMA2P and AAILs were varied between 0.300 to 0.500 wt% and 0.025 to 0.075 wt%, respectively. A thermodynamic correlation approach with respect to mass fraction and temperature was employed to correlate the surface tension of DMA2P-AAILs aqueous solutions. The surface entropy (SS) and surface enthalpy (HS) were calculated from the analytical formulation and their variation with mass fraction and temperature were demonstrated. The effects of the types of AAILs on surface properties were also analyzed and compared.