Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Study on the aqueous two-phase systems composed of surfactant, ionic liquid and water

Wang, X.[Xiuhong], Wei, X.[Xilian], Liu, J.[Jie], Liu, J.[Jifeng], Sun, D.[Dezhi], Du, P.[Panpan], Ping, A.[Ali]
Fluid Phase Equilib. 2013, 347, 1-7
ABSTRACT
The phase behavior and microstructures of the aqueous two-phase systems (ATPS) composed of a cationic/an anionic surfactant (3-p-nonylphenoxy-2-hydroxypropyltrimethylammonium bromide, NPTAB/sodium dodecylbenzenesulfonate, SDBS) and an ionic liquid (1-hexyl-3-methylimidazolium tetrafluoroborate, [Hmim][BF4]) were studied by using cryogenic transmission electron microscopy (Cryo-TEM) observations, nuclear magnetic resonance (NMR) experiments and electric conductivity. The concentration effects of the surfactants and the ionic liquid on the phase separation were systematically investigated. The experimental outcomes indicated that the formation of ATPS can be attributed to the coexistence of different micelles in the upper and lower phases. The ATPS here investigated were further characterized for the first time through their application to the extractive potential for amino acids, where l-tryptophan was selected as a model biomolecule.
Compounds
# Formula Name
1 C10H19BF4N2 1-hexyl-3-methylimidazolium tetrafluoroborate
2 C18H29NaO3S sodium dodecylbenzenesulfonate (ILL DEFINED!)
3 C21H38BrNO2 3-p-nonylphenoxy-2-hydroxypropyltrimethylammonium bromide
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
  • 3
  • 4
  • 1
  • Mass fraction - 3 ; Liquid mixture 2
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Density calibration data
  • Density calibration data
  • Density calibration data
  • 9
  • POMD
  • 3
  • 4
  • 1
  • Mass density, kg/m3 ; Liquid
  • Mass fraction - 3; Liquid
  • Mass fraction - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 9
  • POMD
  • 3
  • 4
  • 1
  • Mass density, kg/m3 ; Liquid
  • Mass fraction - 3; Liquid
  • Mass fraction - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 9
  • POMD
  • 4
  • 2
  • 1
  • Mass fraction - 2 ; Liquid mixture 2
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Density calibration data
  • Density calibration data
  • Density calibration data
  • 9
  • POMD
  • 4
  • 2
  • 1
  • Mass density, kg/m3 ; Liquid
  • Mass fraction - 2; Liquid
  • Mass fraction - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 9
  • POMD
  • 4
  • 2
  • 1
  • Mass density, kg/m3 ; Liquid
  • Mass fraction - 2; Liquid
  • Mass fraction - 1; Liquid
  • Temperature, K; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Vibrating tube method
  • 9