Oil-in-water microemulsion globules as carriers of lipophilic substances across liquid membranes
The carrier properties of microemulsion droplets were investigated by using biphasic systems of the Winsor I type (constituted of an oil-phase floating on the top of an oil-in-water microemulsion phase). The systems investigated were constituted of sodium dodecyl sulfate/1-pentanol/n-dodecane/ (or brine). The microemulsion was used as a liquid membrane between 2 oil phases (a source phase and a receiving phase) and the rate of transfer of neutral arenes (pyrene, perylene, and anthracene), practically insoluble in the water continuous phase of the microemulsion, was determined from ultraviolet spectrophotometric measurements. The influence of different parameters on the transported solutes was studied: initial concentration of solute in the source phase, composition of the microemulsion, salt concentration. The results are shown to be consistent with a model in which the diffusion of droplets is coupled with a fast solubilization-desolubilization process and other possible mechanisms are critically examined. 32 references.
- OSTI ID:
- 6111029
- Journal Information:
- J. Phys. Chem.; (United States), Vol. 87:23
- Country of Publication:
- United States
- Language:
- English
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