Size of the sodium dodecylsulfate aggregate bound to polyethylene glycol: Effect of different cations

Journal Article · Wed Mar 31 23:00:00 EST 1993 · Journal of Colloid and Interface Science; (United States)

DOI:https://doi.org/10.1006/jcis.1993.1151· OSTI ID:6606662

Maltesh, C; Somasundaran, P ^[1]

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1. Columbia Univ., New York, NY (United States)

Dynamic fluorescence spectroscopy of micelle-solubilized pyrene was used to measure the size of the sodium dodecylsulfate (SDS) aggregate bound to polyethylene glycol (PEG). The measurements were carried out with very dilute PEG and SDS concentrations, to ensure that there were no free surfactant aggregates in solution and that all aggregates present were bound to the polymer. Effect of salts of sodium, cesium, lithium, and magnesium of varying concentrations on the size of the bound aggregate was determined. The affinity of the cation toward PEG controlled the size of the SDS aggregate bound to the polymer. The stronger the binding between the cation and PEG, the smaller was the bound SDS aggregate. There was no effect of either the anion or the salt concentration for a particular cation on the size of the bound SDS aggregate. As the ionic strength increased, the only parameter affected was the number of bound surfactant aggregates per polymer chain. Results are discussed in terms of simultaneous affinities of the cations toward the polymer and the micelle.

• OSTI ID: 6606662
• Journal Information: Journal of Colloid and Interface Science; (United States), Journal Name: Journal of Colloid and Interface Science; (United States) Vol. 157:1; ISSN 0021-9797; ISSN JCISA5
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AGGLOMERATION
ALCOHOLS
ALKALI METAL COMPOUNDS
ALKALI METALS
ALKALINE EARTH METALS
CATALYTIC EFFECTS
CESIUM
DISPLACEMENT FLUIDS
ELEMENTS
EMISSION SPECTROSCOPY
FLUIDS
FLUORESCENCE SPECTROSCOPY
GLYCOLS
HYDROXY COMPOUNDS
LITHIUM
MAGNESIUM
METALS
MICELLAR SYSTEMS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PARTICLE SIZE
POLYETHYLENE GLYCOLS
POLYMERS
SIZE
SODIUM
SODIUM COMPOUNDS
SODIUM SULFATES
SPECTROSCOPY
SULFATES
SULFUR COMPOUNDS
SURFACTANTS