Microcalorimetric determination of the enthalpy of micelle formation for a polyoxyethylene nonionic surfactant

Journal Article · Sun Feb 01 04:00:00 EST 1981 · J. Colloid Interface Sci.; (United States)

DOI:https://doi.org/10.1016/0021-9797(81)90096-5· OSTI ID:7023571

Woodhead, J L; Lewis, J A; Malcolm, G N; Watson, I D

This paper presents results of a determination by a combination of calorimetric and ultracentrifuge techniques of the enthalpy and entropy of micelle formation at 2 temperatures in aqueous solutions of the nonionic surfactant poly(oxyethylene) dodecyl ether, C/sub 12/OE/sub 23/ solutions at 2 temperatures. Ultracentrifuge measurements were used primarily to obtain the concentrations of monomer in the solutions before and after dilution, from which the amounts of monomer formed by dissociation of the micelles in the dilution experiments could be calculated. Other information such as the average degree of association in the micelles was obtained also from the ultracentrifuge measurements. 19 references.

• OSTI ID: 7023571
• Journal Information: J. Colloid Interface Sci.; (United States), Journal Name: J. Colloid Interface Sci.; (United States) Vol. 79:2; ISSN JCISA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALCOHOLS
CALORIMETRY
CENTRIFUGATION
DILUTION
DISSOCIATION
ENTHALPY
ENTROPY
GLYCOLS
HYDROXY COMPOUNDS
MICELLAR SYSTEMS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PHYSICAL PROPERTIES
POLYETHYLENE GLYCOLS
POLYMERS
QUANTITY RATIO
SEPARATION PROCESSES
SURFACTANTS
SYNTHESIS
TEMPERATURE EFFECTS
THERMODYNAMIC PROPERTIES
ULTRACENTRIFUGATION