Vapor Components of the Geraniol-Geranyl Acetate Binary Solution Solubilized in Sodium Dodecyl Sulfate Micelles

Abstract

Much effort and experience have been required for. perfuming detergents and soaps, since the aroma of odorants solubilized in surfactants can be differnt from that of the original blend. Previous papers described the solubilization of 4 pure perfume materials into sodium dodecyl sulfate (SDS) micelles and their aroma intensity. In the present study, details of the solubilization mechanism of the geraniol-geranyl acetate binary solution into the micelles, partial vaporpressure and concentration of aroma from the dispersed system were inve stigated by using the methods described in the previous papers. Geraniol molecules were solubilized into the palisade and hydrophobic-group layer of SDS micelles. On the other hand, geranyl acetate molecules were solubilized only into the hydrophobic layer. Number of micelles in the dispersed system increased in proportion to the amount of added geraniol until geraniol molecules filled the palisade layer. The amount of solubilized geranyl acetate increased with the number of micelles in the dispersed system. As geraniol molecules became solubilized into the hydrophobic zone, the solubility of geranyl acetate decreased. While the relative volatility of geranyl acetate to geraniol was quite low in the original blends, it became heightened in the dispersed system as the partial vapor pressure of geraniol decreased remarkably. Vapor components of the binary solutions solubilized in surfactant micelles differed from those of the original blend solution. The findings give an explanation for the characteristic property of the aroma of odorants solubilized in surfactants.