Characterization of micellar solutions using surfactant ion electrodes
Surfactant ion electrodes were used to investigate the dimerization, aggregation, and micelle formation occurring at 25 C in aqueous solutions of sodium dodecyl sulfate, decyltrimethylammonium bromide, tetradecyltrimethylammonium bromide (TTAB), and orange II (4-((2-hydroxy-1-naphthalenyl) acid monosodium salt) as a function of added electrolyte. The surfactant electrodes, which contained a liquid membrane ion exchanger, permitted a direct determination of the surfactant monomer activity. Analysis of these data gave an association constant of 1000 for orange II, an estimated fractional charge on the DTAB micelle of 0.78, a dimerization constant of 400 (l/m) for TTAB, and a second break above the commonly accepted critical micelle concentration for sodium dodecyl sulfate, a break which may result from an ordering of the micelles. 20 references.
- OSTI ID:
- 6170738
- Journal Information:
- J. Phys. Chem.; (United States), Vol. 84:6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
DISPLACEMENT FLUIDS
CHEMICAL ANALYSIS
MICELLAR SYSTEMS
AGGLOMERATION
DIMERIZATION
AMMONIUM COMPOUNDS
AQUEOUS SOLUTIONS
BROMIDES
ELECTRODES
PARTICLES
QUANTITY RATIO
SODIUM SULFATES
SURFACTANTS
ALKALI METAL COMPOUNDS
BROMINE COMPOUNDS
CHEMICAL REACTIONS
DISPERSIONS
FLUIDS
HALIDES
HALOGEN COMPOUNDS
MIXTURES
OXYGEN COMPOUNDS
POLYMERIZATION
SODIUM COMPOUNDS
SOLUTIONS
SULFATES
SULFUR COMPOUNDS
020300* - Petroleum- Drilling & Production
400301 - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)