低共熔溶剂提取小米糠多酚及微胶囊制备  

Low Eutectic Solvent Extraction of Polyphenols from Millet Branand Its Microcapsule Preparation

作　　者：朱俊玲[1] 梁凯 王春艳 王晓闻[1] Zhu Junling;Liang Kai;Wang Chunyan;Wang Xiaowen(Shanxi Agricultural University,Jinzhong 030801,Shanxi)

机构地区：[1]山西农业大学,山西晋中030801

出　　处：《中国食品学报》2023年第12期179-187,共9页Journal of Chinese Institute Of Food Science and Technology

基　　金：山西农谷建设科研专项项目(SXNGJSKYZX201901)。

摘　　要：小米糠多酚性质不是很稳定,在一定条件下容易发生氧化变质。本文以超声波联合DESs提取小米糠多酚,对其进行包埋制备微胶囊并研究其理化性质。在单因素实验基础上设计响应面试验,优化其工艺条件。结果表明:优化的工艺条件是:料液比1∶36 g/mL,45℃超声辅助提取30 min。在此条件下,小米糠总多酚含量为10.58 mg/g。制备微胶囊后,用扫描电镜分析小米糠多酚微胶囊的结构,发现微胶囊外表面光滑,颗粒大小均匀,没有出现孔洞现象。红外图谱表明酵母细胞对小米糠多酚包埋效果良好。在模拟胃液中,小米糠多酚微胶囊的释放较之在模拟肠液中快,2 h内芯材释放量高达96%,5 h后芯材基本释放完全。微胶囊化增加了小米糠多酚的稳定性能,为小米糠的深层开发利用提供理论参考。Millet bran is rich in nutrients and bioactive components.Polyphenols play an important role as one of the active components,but their properties are not very stable and are prone to oxidative degradation under certain conditions.In this paper,we extracted polyphenols from millet bran by ultrasonic combined with DESs and prepared microcapsules by embedding them to study their physicochemical properties.The results showed that the total polyphenol content of millet bran was 10.58 mg/g under the conditions of ultrasonic-assisted extraction for 30 min at 45℃with a material-liquid ratio of 1∶36 g/mL.After the microcapsules were prepared,the structure of millet bran polyphenol microcapsules was analyzed by scanning electron microscopy,and it was found that the outer surface of the microcapsules was smooth and the particles were of uniform size.The infrared spectrum showed that the yeast cells had a good effect on the encapsulation of millet bran polyphenols;in the simulated gastric juice,the release of millet bran polyphenol microcapsules was faster than in the simulated intestinal juice,and the core material was released up to 96%within 2 h,and the core material was basically released completely after 5 h.Microencapsulation increased the stability performance of millet bran polyphenols,and provided the theoretical basis for the deep development and utilization of millet bran.

关 键 词：小米糠 多酚 低共熔溶剂 提取 微胶囊 

分 类 号：TS210.9[轻工技术与工程—粮食、油脂及植物蛋白工程]