响应面法优化南极磷虾油微胶囊喷雾干燥制备工艺的研究

为提高南极磷虾油微胶囊化率，降低南极磷虾油微囊化利用成本，以酪蛋白酸钠、明胶、麦芽糊精为壁材，采用喷雾干燥法对南极磷虾油进行微胶囊化包埋，利用单因素实验结合响应面优化包埋工艺，并对微胶囊化后产品的理化性质进行研究。结果表明:酪蛋白酸钠质量分数为24.55%、明胶质量分数为4.86%、芯壁质量比为0.33，麦芽糊精质量分数为45.60%，南极磷虾油微胶囊包埋率为93.79%。微胶囊水分含量2.31%±0.12%，吸湿性强，灰分含量为2.04% ± 0.14%，微胶囊粒径集中在14.8～26.7 μm。响应面法预测各因素对南极磷虾油微胶囊包埋率的影响大小关系为:芯壁质量比>明胶>酪蛋白酸钠。机械强度试验表明，在不同的pH环境和离心时间条件下，微胶囊中南极磷虾油释放率小于0.3%，微胶囊结构非常稳定。

Optimization of Spray Drying Process of Antarctic Krill Oil Microcapsule by Response Surface Methodology

In order to improve the embedding rate of Antarctic krill oil and reduce the costs, sodium caseinate, gelatin and maltodextrin were used as wall materials to prepared microencapsulation of Antarctic krill oil by spray drying method. Then, physicochemical properties of the products were studied. The results showed that the mass fraction of sodium caseinate was 24.55%, the mass fraction of gelatin was 4.86%, the mass ratio of core to wall was 0.33, the mass fraction of maltodextrin was 45.60%, and the embedding rate was 93.79%. The water content and ash content of the prepared microcapsule were 2.31%±0.12% and 2.04%±0.14%. The microcapsule power had no shrimp smell and the particle size focuses on 14.8~26.7 μm. The order of the effects of various factors on the embedding rate of Antarctic krill oil microencapsulated was: The mass ratio of core to wall > the mass fraction of gelatin > the mass fraction of sodium caseinate. The mechanical strength test showed that the release rate of Antarctic krill oil in the microcapsules was less than 0.3% under different pH conditions and centrifugal time, and the structure of the microcapsules was very stable.