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

Thermodynamic Parameters of Anionic Surfactant-Additive Systems at the Cloud Point

Ahmad, T.[Tanweer], Ghazali, A.[Arniza], Sulaiman, O.[Othman], Hashim, R.[Rokiah], Khan, Z.[Ziya], Kabir-ud-Din
J. Chem. Eng. Data 2010, 55, 11, 5055-5058
ABSTRACT
The thermodynamic parameters of an aqueous anionic surfactant, tetrabutylammonium dodecyl sulfate (TBADS), are calculated in the presence of various additives (viz., quaternary bromides, alcohols, and amines) at the cloud point (CP) of the TBADS-additive system. As the clouding components release their solvated water, they separate out from the solution. Therefore, the CP of an amphiphile can be considered the limit of its solubility. The standard Gibbs energy change of solubilization (deltasGdeg ) for all of the additives is found to be negative. The standard enthalpy change (deltasHdeg ) and the standard entropy change (TdeltasSdeg ) values are found to be negative as well as positive depending upon the type and nature of the additive. The results are explained on the basis of their nature, effect on the water structure, and solubilization of these additives either in the micellar or aqueous phase.
Compounds
# Formula Name
1 C28H61NO4S tetrabutylammonium dodecyl sulfate
2 C8H20BrN tetraethylammonium bromide
3 C12H28BrN tetrapropylammonium bromide
4 C16H36BrN tetrabutylammonium bromide
5 H2O water
6 C3H8O propan-1-ol
7 C4H10O butan-1-ol
8 C5H12O pentan-1-ol
9 C6H14O hexan-1-ol
10 C7H16O heptan-1-ol
11 C2H7N ethylamine
12 C4H11N 1-butanamine
13 C6H15N 1-hexanamine
14 C7H17N 1-heptanamine
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
  • 2
  • 5
  • 1
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 2; Liquid mixture 1
  • Solvent: Amount concentration (molarity), mol/dm3 - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • VISOBS:UFactor:4
  • 22
  • POMD
  • 3
  • 5
  • 1
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 3; Liquid mixture 1
  • Solvent: Amount concentration (molarity), mol/dm3 - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • VISOBS:UFactor:4
  • 21
  • POMD
  • 4
  • 5
  • 1
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 4; Liquid mixture 1
  • Solvent: Amount concentration (molarity), mol/dm3 - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • VISOBS:UFactor:4
  • 23
  • POMD
  • 6
  • 5
  • 1
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 6; Liquid mixture 1
  • Solvent: Amount concentration (molarity), mol/dm3 - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • VISOBS:UFactor:4
  • 9
  • POMD
  • 7
  • 5
  • 1
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 7; Liquid mixture 1
  • Solvent: Amount concentration (molarity), mol/dm3 - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • VISOBS:UFactor:4
  • 15
  • POMD
  • 8
  • 5
  • 1
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 8; Liquid mixture 1
  • Solvent: Amount concentration (molarity), mol/dm3 - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • VISOBS:UFactor:4
  • 13
  • POMD
  • 9
  • 5
  • 1
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 9; Liquid mixture 1
  • Solvent: Amount concentration (molarity), mol/dm3 - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • VISOBS:UFactor:4
  • 15
  • POMD
  • 10
  • 5
  • 1
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 10; Liquid mixture 1
  • Solvent: Amount concentration (molarity), mol/dm3 - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • VISOBS:UFactor:4
  • 14
  • POMD
  • 11
  • 5
  • 1
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 11; Liquid mixture 1
  • Solvent: Amount concentration (molarity), mol/dm3 - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • VISOBS:UFactor:4
  • 10
  • POMD
  • 12
  • 5
  • 1
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 12; Liquid mixture 1
  • Solvent: Amount concentration (molarity), mol/dm3 - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • VISOBS:UFactor:4
  • 9
  • POMD
  • 13
  • 5
  • 1
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 13; Liquid mixture 1
  • Solvent: Amount concentration (molarity), mol/dm3 - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • VISOBS:UFactor:4
  • 17
  • POMD
  • 14
  • 5
  • 1
  • Liquid-liquid equilibrium temperature, K ; Liquid mixture 1
  • Mole fraction - 14; Liquid mixture 1
  • Solvent: Amount concentration (molarity), mol/dm3 - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • VISOBS:UFactor:4
  • 12