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

Interfacial Tension of the n-Hexane Water System under the Influence of Magnetite Nanoparticles and Sodium Dodecyl Sulfate Assembly at Different Temperatures

Saien, J.[Javad], Pour, A. R.[Azadeh Rezvani], Asadabadi, S.[Simin]
J. Chem. Eng. Data 2014, 59, 6, 1835-1842
ABSTRACT
The influence of sodium dodecyl sulfate (SDS) and magnetite nanoparticles (NPs), individually and simultaneously, on the interfacial tension of n-hexane water was studied over the temperature range from (288.2 to 308.2) K. Results show that SDS in the range from (0 to 2.00*10 4) mol*dm 3 is adsorbed positively; while, NPs in the mass fraction range from (0 to 5.00*10 4) are adsorbed negatively and cause interfacial tension to rise. Interestingly, with the presence of both SDS and NPs, interfacial tension is reduced more than with SDS only, because the repulsive interactions between SDS molecules are weakened in the presence of positively charged NPs. An almost linear decrease in interfacial tension with temperature is also relevant in all cases. The experimental data, below the critical micelle concentration of SDS, were nicely reproduced by the Szyszkowski adsorption isotherm. Accordingly, obtained SDS saturated interface excess is reduced with NPs mass fraction, and on the other hand, adsorption tendency increases with temperature and NPs mass fraction.
Compounds
# Formula Name
1 C6H14 hexane
2 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
  • 2
  • 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
  • 1
  • 2
  • Mass density, kg/m3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid - 2
  • Vibrating tube method
  • 5
  • POMD
  • 1
  • 2
  • Mass density, kg/m3 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid - 1
  • Vibrating tube method
  • 5