Abstract: The sodium octenylsuccinate starch and gum arabic of low viscosity were used as wall material respectively to microencapsulate oil. The relative emulsion stability was analyzed. It was found that the viscosity of sodium octenylsuccinate starch was lower than that of gum arabic. The emulsion stability when sodium octenylsuccinate starch was used as wall materials to microencapsulate oil was better than that when gum arabic was used as wall material. The higher the degree of substitution in sodium octenylsuccinate starch, the better was the emulsion stability. Both microencapsulation efficiency and storing stability when sodium octenylsuccinate starch was used as wall material was higher than that when gum arabic was used as wall material. The storing stability of microencapsulated oil would be higher with the increase of the degree of substitution of sodium octenylsuccinates tarch.

Key words: sodium octenylsuccinate starch, gum arabic, emulsion stability, microencapsulation