Equilibria and structures of microemulsions and liquid crystals in water-surfactant-oil systems
Microemulsions and lyotropic mesophases in aqueous solutions of association colloids are closely related. The ionic groups are always completely hydrated in micelles and mesoaggregates. Strong evidence of this is provided by the fact that the heat of solution of solid sodium octanoate both in a moderately concentrated micellar aqueous solution and in a reversed micellar solution of sodium octanoate in decanol containing solubilized water is ca 1.8 kJ mole/sup -1/. These results are in agreement with the hypothesis that the electric contributions to the energy of the interfaces are decisive for the formation of different aggregates. Accordingly, the equilibrium between 2 different aggregates should be characterized by an equal number of ionized groups per unit area of the micellar surfaces and equal effects of counterions. 22 references.
- OSTI ID:
- 6827488
- Journal Information:
- J. Colloid Interface Sci.; (United States), Journal Name: J. Colloid Interface Sci.; (United States) Vol. 85:2; ISSN JCISA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALCOHOLS
ALKALI METAL COMPOUNDS
AQUEOUS SOLUTIONS
COLLOIDS
CRYSTALS
DECANOLS
DISPERSIONS
EMULSIONS
FLUIDS
HYDROXY COMPOUNDS
INTERFACES
LIQUID CRYSTALS
LIQUIDS
MICELLAR SYSTEMS
MICROEMULSIONS
MIXTURES
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PHASE STUDIES
SODIUM COMPOUNDS
SOLUTIONS
SURFACTANTS