ABSTRACT

For switchable hydrophilicity solvent (SHS) systems (N,N-Dimethylcyclohexylamine (DMCA), water, and carbon dioxide): the density, viscosity, refractive index and conductivity at (283.15-308.15) K and 0.1 Mpa, were measured. The apparent molar volumes were determined as a function of composition at each temperature from experimental data. Based on Masson's equation limiting apparent molar volumes and Masson's coefficient SV describing the character of interactions were calculated. The relative viscosity values were adjusted to obtain the viscosity B coefficients and dB/dT values. It has been observed that there exist strong solute-solvent and solute-solute interactions in these systems, and DMCAH-bicarbonate salt acts as structure-maker in aqueous solvent.

Compounds

#	Formula	Name
1	C8H17N	N,N-dimethylcyclohexylamine
2	CO2	carbon dioxide
3	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	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	6
POMD	1 2 3	Mass fraction - 2 ; Liquid	Solvent: Mass fraction - 1; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Gas	NMR	6
POMD	1 2 3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mass fraction - 2; Liquid Solvent: Mass fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	36
POMD	1 2 3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Mass fraction - 2; Liquid Solvent: Mass fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Concentric cylinders viscometry	36
POMD	1 2 3	Refractive index (Na D-line) ; Liquid	Temperature, K; Liquid Mass fraction - 2; Liquid Solvent: Mass fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Standard Abbe refractometry	36
POMD	1 2 3	Electrical conductivity, S/m ; Liquid	Temperature, K; Liquid Mass fraction - 2; Liquid Solvent: Mass fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Direct current cell with electrodes	36

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Physicochemical properties of switchable-hydrophilicity solvent systems: N,N-Dimethylcyclohexylamine, water and carbon dioxide

Wang, Jian, Du, Yongqin, Du, Cunbin, Xu, Anli, Yao, Ganbing, Zhao, Hongkun, Zhu, Xuedong, Guo, Xuhong

ABSTRACT