It was found that stable reverse vesicles of sucrose monoal-kanoate form in decane + hexanol in the presence of a small amount of water. They are the dispersion of lamellar liquid crystal which swell a considerable amount of oil. The interlayer spacing of the bilayers is increased upon addition of hexanol. As a result, hexanol is effective in making the bilayers flexible and in dispersing the liquid crystal as reverse vesicles. The structure of the reverse vesicles was confirmed by video-enhanced microscopy, fluorescence microscopy, and freeze-fracture transmission electron microscopy(Cryo-TEM). The orientation of amphiphilic molecules is completely opposite to that in normal vesicles, i.e., with the hydrophilic part located inward. The thickness of the bilayers (about 10 nm) observed from Cryo-TEM photography is in good agreement with SAXS (small-angle X-ray scattering) data. The smaller vesicles with sizes of submicrometer order are very stable and are not precipitated for several months.

Properties of diglycride as emulsifier were studied. We found HLB value of commercial glyc eride containing some compounds (monoglyceride, diglyceride, triglyceride etc .) became lower with increasing content of monoglyceride. We realized polar monoglyceride have lower HLB value than diglyceride by PIT and EIP methods. Monoglyceride, had more surface active pro perties, more lowering effect of PIT and stronger tendency to favor W/O emulsification than diglyceride. We found diglyceride had usefull properties as cosmetic ingredient, because oil phase containing diglyceride could be emulsified easily with little water soluble emulsifier and viscosity of these emulsions were not change for three month.