Abstract
Abstract The solubilities of oxygen, argon, methane, ethane, propane, and carbon tetrafluoride have been determined at elevated pressures in aqueous solutions of lithium perfluorooctanoate and lithium perfluorodecanoate at 25°C. The solubility of each gas follows Henry's law at all surfactant concentrations. Above the CMC, the solubility of each gas increases linearly with surfactant concentration indicating micellar solubilization. The degree to which gases are solubilized by lithium perfluorooctanoate is found to be the same as that determined previously for sodium perfluorooctanoate, indicating an absence of counterion effects. Lithium perfluorodecanoate is found to be a more effective solubilizing agent than lithium or sodium perfluorooctanoate. The observed variation of intramicellar gas solubilities can be explained satisfactorily in terms of bulk properties of perfluorocarbon solvents using the Laplace pressure model.
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