Zhang Huirong, Song Guanjie, Ma Wenrui, Guo Miaomiao, Ling Xiao, Yu Dan, Zhou Weiqiang, Li Li
College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing, China.
Beijing Key Laboratory of Plants Resource Research and Development, Beijing, China.
Front Nutr. 2023 Jan 11;9:1043879. doi: 10.3389/fnut.2022.1043879. eCollection 2022.
Sea buckthorn () seed oil is rich in unsaturated fatty acids, and is thus susceptible to oxidation and rancidity. Microencapsulation technology allows the effective protection of active substances, thereby prolonging the deterioration time and shelf life.
In this study, microcapsules were prepared using a spray-drying method, and the microencapsulation parameters were optimized. The morphological characteristics, structural parameters, and stability of the microcapsules were determined using scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, and oil oxidation stability testing.
Based on encapsulation efficiency (EE, %) and the particle size (D50) of the microcapsules, the optimal preparation conditions were characterized as a wall material consisting of soy protein isolate and soybean polysaccharide (2:3), a wall concentration of 15%, a core-to-wall ratio of 1:3, and an inlet temperature of 160°C. Under these optimal conditions, the encapsulation efficiency was 95.30 ± 2.67%, with a yield of 57.03 ± 3.71% and a particle size of 7.96 ± 1.04 μm.
Furthermore, the effectiveness of microencapsulation in protecting the biological activity of seed oil was confirmed by an antioxidation test. Thus, the results of this study showcase the successful microencapsulation of seed oil, thereby significantly improving its stability.
沙棘籽油富含不饱和脂肪酸，因此易氧化酸败。微胶囊技术可有效保护活性物质，从而延长其变质时间和保质期。
本研究采用喷雾干燥法制备微胶囊，并对微胶囊化参数进行优化。利用扫描电子显微镜、傅里叶变换红外光谱、热重分析、差示扫描量热法和油脂氧化稳定性测试等方法测定微胶囊的形态特征、结构参数和稳定性。
基于微胶囊的包封率（EE，%）和粒径（D50），最佳制备条件为：壁材由大豆分离蛋白和大豆多糖组成（2:3），壁材浓度为15%，芯壁比为1:3，进样温度为160°C。在这些最佳条件下，包封率为95.30±2.67%，产率为57.03±3.71%，粒径为7.96±1.04μm。
此外，抗氧化试验证实了微胶囊化对保护沙棘籽油生物活性的有效性。因此，本研究结果表明沙棘籽油微胶囊化成功，从而显著提高了其稳定性。
