ABSTRACT

In this study, effect of some ionic liquids on the thermodynamic and transport properties of L(+) lactic acid in aqueous polyethylene glycol solutions have been investigated. Density, speed of sound and viscosity of L(+)-lactic acid in the aqueous solutions of polyethylene glycol, (polyethylene glycol + 1-hexyl-3-methylimidazolium bromide) and (polyethylene glycol + 1-octyl-3-methylimidazolium bromide) were measured at temperatures (288.15 - 318.15) K. Apparent molar volumes, transfer apparent molar volume, apparent molar isentropic compressibility and viscosity B-coefficient of L(+)-lactic acid were calculated by using experimental data and were discussed in terms of solute-solute and solute-solvent interactions. The results reveal that solute-solvent interactions were decreased by increasing concentration of ionic liquid, length of alkyl group of ionic liquid and temperature.

Compounds

#	Formula	Name
1	C3H6O3	(S)-2-hydroxypropanoic acid
2	H2O	water

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Constraint	Phase	Method	#Points
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	4
POMD	2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	4
POMD	2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	4
POMD	1 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	40
POMD	1 2	Speed of sound, m/s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Sing-around technique in a fixed-path interferometer	40
POMD	1 2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Molality, mol/kg - 1; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	40

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Influence of 1-alkyl-3-methylimidazolium based ionic liquids on the thermodynamic and transport properties of L(+)-lactic acid in aqueous solutions of polyethylene glycol

Mehrdad, A.[Abbas], Shekaari, H.[Hemayat], Noorani, N.[Narmin]

ABSTRACT