茶多酚微胶囊化的试验研究

采用喷雾干燥法,以生物可降解高分子材料羟丙基甲基纤维素邻苯二甲酸酯（HPMCP）为骨架材料,对茶多酚进行微胶囊化研究。以微球的包封率作为实验指标,用L₉ (3⁴)正交实验设计优化制备茶多酚微球的工艺,得到以下结果：加入少量乳化剂可较大程度提高产品的包封率,十二烷基硫酸钠(SDS)作为乳化剂效果比聚乙烯醇(PVA)好,最佳添加量是芯壁材总重的4％;制备茶多酚缓释微球的最佳条件为：进风温度100℃,进料速度6.25βml/min,芯壁材比为2:1,总固形物含量为3％。采用HPMCP作为壁材,以喷雾干燥法对茶多酚进行微胶囊化是可行的,茶多酚微球有一定的缓释效果。

Experimental study on Microencapsulation of Tea Polyphenols

To explore the new method of preparing slow-releasing microspheres of tea polyphenols, which will be useful for the applications of tea polyphenols. Through spray drying technology, tea polyphenols were microencapsulated by hydroxypropyl methylcellulose phthalate which is a biodegradable material. The microencapsulation process of tea polyphenols was optimized with orthogonal design L9 (34), the retention of tea polyphenols microspheres was used as the index. Results: A little emulsifier could increase the retention greatly , and the efficiency of SDS was better than PVA. The optimized conditions of tea polyphenols microencapsulation were that entrance temperature was 100℃, entrance speed was 6.25 ml/min, proportion of tea polyphenols and wall material was 2:1, proportion of all solid maters was 3%. Using Hydroxypropyl methylcellulose phthalate as the wall material is feasible to prepare tea polyphenols microspheres by spray drying technology, and tea polyphenols microspheres had a slow-releasing efficiency.