PCATALOG
Preparation and Stability Evaluation of Novel Lycopene Microcapsules
Pubdate：2022-01-13 Click：542
Abstract: Lycopene microcapsules were prepared by spray drying using inulin, maltodextrin or trehalose at different concentrations as the wall material, and a whey protein isolate (WPI)-chitosan bilayer emulsion containing lycopene as the core material. The encapsulation efficiency, microscopic appearance, stability during storage and in a model acidic beverage medium, and in vitro simulated release characteristics of microcapsules were evaluated as a function of wall material type and core-to-wall-material ratio (m/m) to determine the optimal preparation conditions. Under all conditions investigated, the encapsulation efficiency of microcapsules were in the range of 72.97%—81.90% and all samples prepared exhibited a typical spherical structure; with the decrease in core-to-wall-material ratio, the physicochemical stability of microencapsulated lycopene increased significantly both during storage and in the acidic environment (P < 0.05). Controlled release of microencapsulated lycopene in simulated gastrointestinal fluid was observed with maltodextrin and trehalose as the wall material in comparison with inulin. The results in this study will help develop a novel carrier for the delivery of lycopene in order to enhance its industrial application.
In this study, lycopene - Wpi-chitosan double emulsion was used as the core material and polysaccharide as the wall material to explore a new preparation method of microcapsules. The results showed that the embedding rate of microcapsules prepared with different wall materials ranged from 72.97% to 81.90%, and the effect of changing the core wall mass ratio on the embedding rate of microcapsules was not obvious. Lycopene microcapsules prepared with trehalose and inulin as wall materials have regular spherical shape, and with the increase of wall material content, the spherical microcapsules have more regular and complete appearance. The protective effect of microcapsules on lycopene increased with the increase of wall material content during storage. The formation of microcapsules can protect lycopene in acidic simulated beverage during normal temperature storage, but the protection effect is not obvious under high temperature and light conditions. Lycopene microcapsules prepared with trehalose as wall material showed good sustained-release performance in the simulated digestion experiment in vitro. In conclusion, the formation of microcapsules with polysaccharide as wall material can effectively improve the stability of lycopene double layer emulsion and realize the controlled release of lycopene under the conditions of storage and acidic room temperature, and the microcapsules prepared with trehalose as wall material and core-wall mass ratio of 1:4 are expected to be applied in future research and industrial production.