Solubilization of oily compounds into fluorocarbon-hydrocarbon hybrid surfactant admicelles formed on alumina surfaces

Sodium 1-oxo-1-[(4-fluoroalkyl)phenyl]-2-alkanesulfonates (FCm-HCn), fluoro carbon-hydrocarbon hybrid surfactants, exhibit a peculiar adsorption behavi or on solid surfaces. This report dealt with an investigation on the solubi lization of oily compounds into admicelles of the hybrid surfactant; Compar ison was also made between the solubilization behavior of the hybrid surfac tant and that of sodium 1-(4-alkylphenyl)-1-oxo-2-alkanesulfonates (HCm-HCn ), double chain-type surfactants, in which the fluorocarbon chain in the hy brid surfactant is replaced by a hydrocarbon chain. As a result, FCm-HCn ad micelles were found to solubilize fluorocarbons such as fluorobenzene and p erfluorobenzene as well as hydrocarbon (2-naphthol). The amount adsolubiliz ed for these oily compounds increased in the order 2-naphthol < fluorobenze ne < perfluorobenzene, showing a high ability of the hybrid surfactant to s olubilize oily compounds containing fluorine. On the other hand, HCm-HCn co uld solubilize fluorocarbons in only very small amounts. Moreover, the hybr id surfactant was found capable of adsolubilizing both hydrocarbon and fluo rocarbon simultaneously because both 2-naphthol and perfluorobenzene were s olubilized into admicelles of the hybrid surfactant from: a mixture of thes e oily compounds.