The effect of temperature on the surface tension of soluble and insoluble surfactants was investigated at an air-water interface. Equilibrium surface tension measurements were performed using the Wilhelmy plate technique in which both temperature and concentration were varied systematically. Insoluble surfactants (oleyl alcohol and hemicyanine) and soluble surfactants (Triton X-100 and sodium dodecyl sulfate (SDS)) were used since they are commonly used in hydrodynamic experiments in which the effects of surfactants on free surface dynamics are studied. The principal result of this investigation is that the surface tension of the above-mentioned surfactants decreases linearly with temperature, independent of concentration, with the exception of oleyl alcohol whose surface tension becomes relatively independent of temperature above 23 C. The adequacy of standard models for surfactant behavior in describing these data is considered.
Compounds
#
Formula
Name
1
C12H25NaO4S
sodium dodecyl sulfate
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
Surface tension liquid-gas, N/m ; Liquid
Temperature, K; Liquid
Ratio of mass of solute to volume of solution, kg/m3 - 1; Liquid