由于无法承受恶劣的环境条件,具有抗菌和抗氧化性能的提取物在食品中的应用受到限制,如高温和氧气暴露。因此,本研究采用冷冻干燥法研究了天麻提取物的纳米封装,以促进其应用和对环境因素的保护。在这方面,一种含有浓度为10%的松果脊髓灰质炎提取物的乳液,20%,和30%的麦芽糊精/波斯胶以1:2、1:1和2:1的三种比例制备作为涂层壁的混合物,然后在冷冻干燥器中干燥。在下文中,研究了乳液和生产的纳米胶囊的性能。根据结果,含有大量波斯胶的乳液显示出更高的稳定性,zeta电位,和粘度。然而,它们的粒径和多视差指数低于其他乳液。随着提取物浓度的增加,稳定性下降,zeta电位,和粘度,伴随着粒度和多分散指数的增加。同时,麦芽糊精浓度升高,波斯胶,提取物导致更高的湿度,密度,封装效率,和胶囊的抗氧化活性。乳液和纳米胶囊的最佳性能是在10%浓度的TeucriumpoliumL.提取物和1:1比例的麦芽糖糊精/波斯胶混合物作为壁材时实现的。值得注意的是,酚类化合物的释放速率在60天后达到其最大值(88%)。
Extracts with antimicrobial and antioxidant properties are limited in their application in food products due to their inability to withstand harsh environmental conditions, such as high temperatures and oxygen exposure. Therefore, the present study investigated the nanoencapsulation of Teucrium polium L. extract using the freeze-drying method to facilitate its application and protection against environmental factors. In this regard, an emulsion containing Teucrium polium L. extract at concentrations of 10%, 20%, and 30% and a mixture of
maltodextrin/Persian gum in three ratios of 1:2, 1:1, and 2:1 as the coating wall were produced and then dried in a freeze dryer. In the following, the properties of emulsions and produced nanocapsules were studied. According to the results, emulsions with high amounts of Persian gum showed more stability, zeta potential, and viscosity. However, their particle size and polydisparity index were lower than those of other emulsions. As the extract concentration increased, there was a decrease in stability, zeta potential, and viscosity, accompanied by an increase in particle size and polydispersity index. Concurrently, elevated concentrations of
maltodextrin, Persian gum, and extract resulted in higher humidity, density, encapsulation efficiency, and antioxidant activity of the capsules. The most optimal properties of emulsions and nanocapsules were achieved at the 10% concentration of Teucrium polium L. extract and the 1:1 ratio of
maltodextrin/Persian gum mixture as the wall material. It is noteworthy that the release rate of phenolic compounds reached its maximum value (88%) after 60 days.