Interfacial tensions of n-hexane with aqueous solutions of sodium dodecyl sulfonate in equilibrium with dimethyl ether at elevated pressures

Journal Article · Sun Feb 01 00:00:00 EST 1981 · J. Colloid Interface Sci.; (United States)

DOI:https://doi.org/10.1016/0021-9797(81)90087-4· OSTI ID:6739937

Jho, C; King, Jr, A D

The interfacial tensions of n-hexane with water and aqueous solutions of sodium dodecyl sulfonate are found to be very sensitive to the presence of dissolved dimethyl ether. Values for the interfacial tension have been determined as a function of pressure by means of the pendant drop method. The change in interfacial tension of hexane against water and aqueous solutions of sodium dodecyl sulfonate induced by dissolved dimethyl ether is found to have a similar pressure dependence to that found previously for water and solutions of this same surfactant in direct contact with gaseous dimethyl ether. It is found that sodium dodecyl sulfonate and dissolved dimethyl ether both serve to lower the interfacial tension between hexane and the aqueous phase. However, their individual contributions are not additive but rather reflect a competition between the mildly surface-active ether molecules and dodecyl sulfonate anions for available area at the oil-water interface. 49 references.

• OSTI ID: 6739937
• Journal Information: J. Colloid Interface Sci.; (United States), Vol. 79:2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
HEXANE
SURFACE TENSION
AQUEOUS SOLUTIONS
CATALYTIC EFFECTS
INTERFACES
METHYL ETHER
PRESSURE DEPENDENCE
SODIUM COMPOUNDS
SULFONATES
SURFACTANTS
ALKALI METAL COMPOUNDS
ALKANES
DISPERSIONS
ETHERS
HYDROCARBONS
MIXTURES
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
SOLUTIONS
SURFACE PROPERTIES
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)