Equilibria and structures of microemulsions and liquid crystals in water-surfactant-oil systems

Journal Article · Mon Feb 01 00:00:00 EST 1982 · J. Colloid Interface Sci.; (United States)

DOI:https://doi.org/10.1016/0021-9797(82)90010-8· OSTI ID:6827488

Danielsson, I; Friman, R; Sjoblom, J

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), Vol. 85:2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DECANOLS
PHASE STUDIES
MICELLAR SYSTEMS
MICROEMULSIONS
SURFACTANTS
AQUEOUS SOLUTIONS
INTERFACES
LIQUID CRYSTALS
OILS
SODIUM COMPOUNDS
ALCOHOLS
ALKALI METAL COMPOUNDS
COLLOIDS
CRYSTALS
DISPERSIONS
EMULSIONS
FLUIDS
HYDROXY COMPOUNDS
LIQUIDS
MIXTURES
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
SOLUTIONS
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)