V_A棕榈酸酯微胶囊的制备及性能研究

Preparation and Properties of Vitamin A Palmitate Microcapsules

以聚天冬氨酸和明胶为壁材,采用单凝聚结合喷雾干燥法制备VA棕榈酸酯微囊。结果表明,最佳原料配比为:壁材浓度为0.1g/mL;芯材与壁材质量比为1∶4;壁材配比为m(明胶)∶m(聚天冬氨酸)=1∶1;乳化剂用量为1.5%;乙醇与水的体积比为1∶2。最佳微胶囊化工艺参数为:喷雾干燥进口温度为160℃,出口温度为70℃,乳化温度为38℃。经过7d的高温(60℃)加速氧化试验,微囊中VA棕榈酸酯的含量为初始含量的84.3%,较好地增加了VA棕榈酸酯的稳定性。

To improve the stability of vitamin A palmitate, microcapsules for vitamin A palmitate were prepared by dry spray with polyaspartic acid and gelatin as wall material. The optimal parameter were found as following： the ratio of polyaspartic acid to gelatin 1 ： 1 （W/W） ; the ratio of core material to wall material 1 ： 4;wall material concentration 10 % （W/V）, emulsifier concentration 1.5 % ; the ratio of absolute alcohol to water 1：2（V/V）. For spray drying, the inlet air temperature 160℃, and outlet air temperature 70℃ ;The temperature of emulsification 38℃. More than 84.3 % of vitamin A palmitate was obtained from seven day- accelerating experiment at 60℃.