Abstract:

In this study, natural vitamin E oil with a content of 62.5% was embedded using modified starch as the wall material and mixed lipophilic and hydrophilic emulsifiers with a total amount of 3%. The properties of the microcapsules obtained were studied by using ultraviolet spectrometry, petroleum ether extraction, laser scanning particle size analyzer, environmental scanning electron microscope (ESEM) to measure total and surface vitamin E contents, the particle size distribution of the reconstituted emulsion and surface microstructure, respectively. The results showed that the total vitamin E content of freshly prepared microcapsules was as high as 30% and after 6-month storage, the surface vitamin E content decreased to smaller than 5%. The reconstituted emulsion displayed a narrow particle size distribution spectrum. Moreover, a compact structure was observed for both freshly prepared and stored microcapsules. Therefore, modified starch, vitamin E oil and a mixture of lipophilic and hydrophilic emulsifiers can compose a stable emulsifying system and the vitamin E oil microcapsules obtained by spray drying have excellent properties.

Key words: high content, natural vitamin E, properties