Demixing of micelles of fluorocarbon and hydrocarbon surfactants. Effects of hydrophobic and hydrophilic groups of hydrocarbon surfactants
The mutual solubility limits, xA and xB, of a nonionic fluorocarbon surfactant (NFE) and dodecyl polyoxyethylene glycol ether (DEm) and of an anionic fluorocarbon surfactant (NF) and sodium alkyl sulfate (SAS) in micelles are determined by the surface tension method as a function of temperature. The elongation of the alkyl chain of SAS increases the critical solution temperature Tc regularly and decreases the critical mole fraction xcH of SAS. These results are in line with the behavior of liquid fluorocarbon-hydrocarbon mixtures. The dependence of Tc and xcH on the concentration of added sodium chloride suggests the participation of the electrostatic effect on mixing of micelles of NF and SAS. The elongation of the oxyethylene chain of DEm for the NFE-DEm system decreases Tc and xcH. 31 references.
- OSTI ID:
- 5588313
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Journal Issue: 2 Vol. 87:2; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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020300* -- Petroleum-- Drilling & Production
ALCOHOLS
ALKALI METAL COMPOUNDS
CHEMISTRY
CHLORIDES
CHLORINE COMPOUNDS
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FOSSIL FUELS
FUELS
GLYCOLS
HALIDES
HALOGEN COMPOUNDS
HYDROXY COMPOUNDS
MICELLAR SYSTEMS
MICROEMULSION FLOODING
MISCIBLE-PHASE DISPLACEMENT
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROLEUM
POLYETHYLENE GLYCOLS
POLYMERS
RECOVERY
SODIUM CHLORIDES
SODIUM COMPOUNDS
SOLUBILITY
SURFACTANTS