Ultralow interfacial tensions and their relation to phase separation in micellar solutions
Micellar solutions containing large micelles, i.e., such that the micelles consist mainly of water of solvatation, sometimes separate into 2 phases:one rich in micelles and the other lean in micelles. The authors show that this can be expected to occur when the micelles are larger than 100 Anstromes in diam. and develop a simple model to represent the system. They also calculate the interfacial tension by the method of Cahn and Hilliard. The model leads to the conclusion that extremely low interfacial tensions are present, below about 10/sup -3/ dynes/cm. The results are in agreement with data reported in the literature on water-oil system solubilized by petroleum sulfonate surfactants. (35 refs.)
- OSTI ID:
- 6576268
- Journal Information:
- J. Colloid Interface Sci.; (United States), Journal Name: J. Colloid Interface Sci.; (United States) Vol. 61:3; ISSN JCISA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300 -- Petroleum-- Drilling & Production
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
COMPARATIVE EVALUATIONS
ESTERS
MANY-DIMENSIONAL CALCULATIONS
MICELLAR SYSTEMS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PETROLEUM SULFONATES
PHASE STUDIES
STRUCTURAL MODELS
SULFONATES
SULFONIC ACID ESTERS
SURFACE PROPERTIES
SURFACE TENSION
SURFACTANTS