Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Interface adsorption and micelle formation of ionic liquid 1-hexyl-3-methylimidazolium chloride in the toluene + water system

Asadabadi, S.[Simin], Saien, J.[Javad], Khakizadeh, V.[Vahid]
J. Chem. Thermodyn. 2013, 62, 92-97
ABSTRACT
The influence of synthesized ionic liquid 1-hexyl-3-methylimidazolium chloride adsorption on equilibrium interfacial tension of toluene-water was studied within concentration range of (1.00E-4 to 6.00E-1) mol/L and temperature range of (293.2 to 313.2) K.Very similar to conventional surfactants, the interfacial tension was decreased with both of these parameters. Meanwhile, the CMC values showed a minimum value within the temperature range studied.The Frumkin adsorption isotherm that accounts for the non-ideal adsorption at the interface showed adequately well for modeling the experimental results. Accordingly quantities like interface excess concentration, adsorption tendency and interaction parameter between adsorbed molecules were obtained at different temperatures. Entropy and energy changes associated with adsorption were also obtained from the temperature dependency of interfacial tension.The adsorption tendency and efficiency increased with temperature, and the maximum interface excess concentration and electrostatic repulsion were achieved at about T = 303.2 K.
Compounds
# Formula Name
1 H2O water
2 C10H19ClN2 1-hexyl-3-methylimidazolium chloride
3 C7H8 toluene
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
  • 1
  • 2
  • Interfacial tension, N/m ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Amount concentration (molarity), mol/dm3 - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Drop volume
  • 70
  • POMD
  • 3
  • 1
  • 2
  • Mass density, kg/m3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Amount concentration (molarity), mol/dm3 - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Vibrating tube method
  • 70
  • POMD
  • 3
  • 1
  • 2
  • Mass density, kg/m3 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Amount concentration (molarity), mol/dm3 - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Vibrating tube method
  • 70
  • POMD
  • 3
  • 1
  • Interfacial tension, N/m ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Drop volume
  • 5
  • POMD
  • 3
  • 1
  • Mass density, kg/m3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Vibrating tube method
  • 5
  • POMD
  • 3
  • 1
  • Mass density, kg/m3 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Vibrating tube method
  • 5