Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Phase equilibria and surfactant behavior of fluorinated ionic liquids with water

Teixeira, F. S., Vieira, N. S. M., Cortes, O. A., Araujo, J. M. M., Marrucho, I. M., Rebelo, L. P. N., Pereiro, A. B.
J. Chem. Thermodyn. 2015, 82, 99-107
ABSTRACT
This work studies the phase equilibria and surfactant behavior of fluorinated ionic liquids (FILs) containing fluorinated chains equal to four carbons with water. The knowledge about the phase behavior is crucial for the applications of these novel FILs with tuneable properties. The phase equilibria of the binary mixtures FILs with water were studied at atmospheric pressure in a temperature range from (298.15 to 353.15) K. In this study, FILs containing ammonium, pyrrolidinium and imidazolium cations and the perfluorobutanesulfonate anion were included. The Non-Random Two Liquid (NRTL) thermodynamic model was successfully applied to rationalize the phase behavior of the binary (water + FILs) mixtures. Furthermore, the critical micelle concentrations (CMCs) of these FILs, which present cations and/or anions with surfactant properties were also performed at T = 298.15 K by measurements of the ionic conductivity. Finally, the Dynamic Light Scattering (DLS) was used with aim to determinate the size of the aggregates of these FILs in water.
Compounds
# Formula Name
1 H2O water
2 C14H19F9N2O3S 1-methyl-3-hexylimidazolium perfluorobutanesulfonate
3 C16H23F9N2O3S 1-methyl-3-octylimidazolium perfluorobutanesulfonate
4 C20H31F9N2O3S 1-dodecyl-3-methylimidazolium perfluorobutanesulfonate
5 C20H36F9NO3S tetrabutylammonium perfluorobutanesulfonate
6 C13H20F9NO3S 1-butyl-1-methylpyrrolidinium perfluorobutanesulfonate
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
  • 2
  • Mass fraction - 2 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Index of refraction calibration data
  • 12
  • POMD
  • 1
  • 2
  • Mass fraction - 2 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Titration method
  • 12
  • POMD
  • 1
  • 2
  • Electrical conductivity, S/m ; Liquid
  • Molality, mol/kg - 2; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 31
  • POMD
  • 1
  • 3
  • Mass fraction - 3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Index of refraction calibration data
  • 12
  • POMD
  • 1
  • 3
  • Mass fraction - 3 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Titration method
  • 12
  • POMD
  • 1
  • 3
  • Electrical conductivity, S/m ; Liquid
  • Molality, mol/kg - 3; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 17
  • POMD
  • 4
  • 1
  • Mass fraction - 4 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Index of refraction calibration data
  • 6
  • POMD
  • 4
  • 1
  • Mass fraction - 4 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Titration method
  • 6
  • POMD
  • 4
  • 1
  • Electrical conductivity, S/m ; Liquid
  • Molality, mol/kg - 4; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 17
  • POMD
  • 1
  • 5
  • Mass fraction - 5 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 5
  • Index of refraction calibration data
  • 1
  • POMD
  • 1
  • 5
  • Electrical conductivity, S/m ; Liquid
  • Molality, mol/kg - 5; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 12
  • POMD
  • 1
  • 6
  • Mass fraction - 6 ; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 6
  • Index of refraction calibration data
  • 1
  • POMD
  • 1
  • 6
  • Electrical conductivity, S/m ; Liquid
  • Molality, mol/kg - 6; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Alternating current cell with electrodes
  • 17