Abstract: Vitamin E (VE) core polyurethane microcapsules were successfully prepared via interfacial polymerization of polyurethane with toluene diisocyanate (TDI) as the isocyanate, polyethylene glycol as the polyol. The factors affecting microencapsulation effectiveness of VE were studied, such as chain-extending reaction temperature, molecular weight of PEG, and mass ratio of core to shell. Based on the present research, the microcapsules have a small narrow particle size distribution and a high yield and appropriate effective load, which are prepared with PEG400 as the polyol at 60℃and the mass ratio of 1/1.25. SEM and dynamic particle size analysis showed that VE microcapsules have smooth surfaces and spherical appearances, the mean particle size of 500~600 nm and distribution of 260~2000 nm.

Key words: microcapsules , polyurethane , vitamin E , skin-care textiles