Rodlike micelles of sodium dodecyl sulfate in concentrated sodium halide solutions

Journal Article · Thu Jan 08 04:00:00 EST 1981 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j150601a024· OSTI ID:6716841

Ikeda, S; Hayashi, S; Imae, T

Light scattering from aqueous solutions of sodium dodecyl sulfate has been measured in the presence of 0.80 mole sodium halides at 35 C. Sodium dodecyl sulfate forms micelles having a molecular weight of aprox. 50,000 or less, at the critical micelle concentration, 0.013 g dl/sup -1/, in solutions of all sodium halides except for NaSCN, in which the micelle size is even smaller. The average micelle size increase with increasing concentration of sodium dodecyl sulfate further, and it reaches a maximum around 1 g dl/sup -1/. The molecular weight of the large micelle formed at the high concentrations is in increasing order: NaSCN, NaF, NaCl, NaBr and NaI; it is 185,000 in NaSCN and 357,000 in NaI solutions. The angular dependence of light scattering indicated that the large micelles are rodlike and have a common structure in NaCl, NaBr, and NaI solutions. 20 references.

• OSTI ID: 6716841
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 85:1; ISSN JPCHA
• Country of Publication: United States
• Language: English

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ALKALI METAL COMPOUNDS
ANTITHYROID DRUGS
BROMIDES
BROMINE COMPOUNDS
CARBONIC ACID DERIVATIVES
CHLORIDES
CHLORINE COMPOUNDS
CONFIGURATION
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HORMONE ANTAGONISTS
INORGANIC PHOSPHORS
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MICELLAR SYSTEMS
MOLECULAR WEIGHT
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
PARTICLE SIZE
PHOSPHORS
QUANTITY RATIO
SCATTERING
SIZE
SODIUM BROMIDES
SODIUM CHLORIDES
SODIUM COMPOUNDS
SODIUM FLUORIDES
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THIOCYANATES