Surface tensions of nonideal mixtures of fluorocarbons and hydrocarbons and their interfacial tensions against water

Journal Article · Thu Dec 10 04:00:00 EST 1981 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j150625a042· OSTI ID:5535829

Handa, T; Mukerjee, P

Surface tensions (..gamma..) of some highly nonideal binary mixtures of fluorocarbons and hydrocarbons and their interfacial tensions (..gamma..) against water have been measured above and below phase-separation temperatures. Very pronounced deviations from ideal behavior have been observed in ..gamma..-x curves, x representing mole fractions. ..gamma..-x curves show deep minima in several cases. The data indicate generally a reciprocal surface (interfacial) activity of fluorocarbons as dilute solutions in hydrocarbons and hydrocarbons as dilute solutions in fluorocarbons. The calculated initial spreading coefficients of the liquid mixtures on water also show unusual behavior. Several theoretical approaches based on a monolayer model of the surface, and different treatments of solution nonideality, have been examined. Although no theory fits the data in a quantitative fashion, the indications are that the unusual behavior observed generally can be ascribed to the intense nonideality of mixing in the bulk liquids combined with relatively ideal mixing behavior at the surface. 25 references.

• OSTI ID: 5535829
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 85:25; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
BINARY MIXTURES
DISPERSIONS
DISPLACEMENT FLUIDS
FLUIDS
HYDROCARBONS
HYDROGEN COMPOUNDS
INTERFACES
MIXTURES
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXYGEN COMPOUNDS
SURFACE PROPERTIES
SURFACE TENSION
WATER