Improving technofunctional performance and emulsion stability of ginsenoside microcapsules by using maltodextrin-inulin/lactose composite wall materials

Abstract

This study prepared ginsenoside microcapsules with different wall materials (maltodextrin, inulin, lactose) by spray drying based on ginsenoside emulsions, and evaluated the influence of maltodextrin-inulin/lactose ratios on the physicochemical characteristics of ginsenoside microcapsules and its reconstituted emulsions. For ginsenoside microcapsules with composite wall materials, the incorporation of inulin/lactose not only improved the wettability of microcapsules from 409 s to 54 s/103 s but also increased the solubility from 83.10% to 88.58%/92.10%, indicating a better reconstitution performance. Compared with fresh ginsenoside emulsions, the droplet size distribution of reconstituted emulsions increased, and the accelerated stability decreased accordingly. However, with the incorporation of inulin/lactose from 0% to 15%, the physicochemical properties of reconstituted emulsions were enhanced surprisingly. Generally, the addition of inulin/lactose not only improves the rehydration performance of microcapsules but also the stability of reconstituted emulsions, which achieved a stable emulsion system and could improve the biologic activity of ginsenosides.