ABSTRACT

The density, viscosity, and conductivity were investigated for binary mixtures of water and three ionic liquids (ILs), respectively: (3-aminopropyl) tributylphosphonium l-?-aminopropionic acid salt ([aP4443][Ala]), (3-aminopropyl) tributylphosphonium l-?-aminoisovaleric acid salt ([aP4443][Val]), and (3-aminopropyl) tributylphosphonium l-?-amino-4-methylvaleric acid salt ([aP4443][Leu]). The mole fractions of water increased from 0.00 to 0.75, and the temperature varied from (298.15 to 343.15) K. It was found that the viscosity decreased while conductivity increased with the increase of temperature and water content. As the alkyl side-chains of the amino acid anions which might play a role of steric hindrance were lengthened, the density (?), viscosity (?), and conductivity (?) follow the order of ?[aP4443][Ala] greater than ?[aP4443][Val] greater than ?[aP4443][Leu], ?[aP4443][Ala] less than ?[aP4443][Val] less than ?[aP4443][Leu], and ?[aP4443][Ala] greater than ?[aP4443][Val] greater than ?[aP4443][Leu], respectively. The temperature-dependent density is fit for the quadratic equation. The temperature dependence of viscosity and conductivity can be described by the Vogel Tammann Fulcher (VTF) equation.

Compounds

#	Formula	Name
1	C18H41N2O2P	(3-aminopropyl)tributylphosphonium L-alaninate
2	C20H45N2O2P	(3-aminopropyl)tributylphosphonium L-valinate
3	C21H47N2O2P	(3-aminopropyl)tributylphosphonium L-leucinate
4	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	1	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Direct current cell with electrodes	6
POMD	1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	6
POMD	1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	6
POMD	2	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Direct current cell with electrodes	6
POMD	2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	6
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	6
POMD	3	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Direct current cell with electrodes	6
POMD	3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	6
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	6
POMD	4 1	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Mole fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	Direct current cell with electrodes	24
POMD	4 1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Mole fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	24
POMD	4 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	24
POMD	4 2	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Mole fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	Direct current cell with electrodes	24
POMD	4 2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Mole fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	n	24
POMD	4 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	24
POMD	4 3	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Mole fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	Direct current cell with electrodes	24
POMD	4 3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Mole fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	24
POMD	4 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mole fraction - 4; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	24

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

Density, Viscosity, and Conductivity for the Binary Systems of Water + Dual Amino-Functionalized Ionic Liquids

Wang, Z.[Zanxia], Fu, L.[Li], Xu, H.[Hui], Shang, Y.[Ying], Zhang, L.[Li], Zhang, J.[Jianmin]

ABSTRACT