Abstract
Vesicle formation of poly (oxyethylene) hydrogenated castor oil derivatives was studied by polarized microscopy, freeze-fractured electron microscopy, particle size analysis, ESR spin labelling, and small angle X-ray diffraction.
It comes to conclusions that poly (oxyethylene) (10) hydrogenated castor oil (HCO-10), in to which 10 moles of oxyethylene moieties of are incorporated, has liquid crystals at 560 wt % of concentration below 40°C. A multilamellar vesicle with ca. 400 nm of an average diameter of was formed at a HCO-10 concentration below 20 wt%. The properties of the HCO-10 vesicle membrane are discussed in terms of anistropy in the ESR spectra and long spacing observed by X-ray diffraction.
