Properties of emulsions stabilized by mixtures of anionic surfactant and anionic polyelectrolyte
Emulsions containing mixtures of anionic surfactant and polyelectrolyte have been investigated by rheological and electrophoretic techniques. The addition of potassium arabate (KA) to emulsions stabilized by potassium laurate (KL) causes increased aggregation through a macromolecular bridging mechanism. The action of KA is modified by KL and both emulsifiers are present at the oil-water interface. At high KL and KA concentrations, a maximum state of aggregation is obtained followed by deaggregation when the polyelectrolyte ceases to act as a flocculant and becomes a protective colloid. KL, at concentrations at and above the c.m.c., penetrates and partially displaces the thick KA interfacial film, leading to aggregation and less stable systems. The rate of penetration follows pseudo first-order kinetics and depends on the age of the KA emulsion and the state of the interfacial film. (33 refs.)
- Research Organization:
- Aston Univ
- OSTI ID:
- 5825294
- Journal Information:
- J. Colloid Interface Sci.; (United States), Journal Name: J. Colloid Interface Sci.; (United States) Vol. 35:4; ISSN JCISA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
ALKALI METAL COMPOUNDS
CHEMICAL REACTIONS
CHEMICAL STATE
CHEMISTRY
COALESCENCE
COLLOIDS
DISPERSIONS
ELECTROPHORESIS
EMULSIONS
FLUID INJECTION
INTERFACES
MICROEMULSION FLOODING
MISCIBLE-PHASE DISPLACEMENT
OIL WELLS
POTASSIUM COMPOUNDS
RHEOLOGY
SEPARATION PROCESSES
STABILITY
SURFACTANTS
WELLS