Oxidation Process of Linoleic Acid Encapsulated with a Polysaccharide by Spray-Drying
Oxidation Process of Linoleic Acid Encapsulated with a Polysaccharide by Spray-Drying
复制标题
多糖包埋亚油酸的喷雾干燥氧化工艺
DOI：
10.3136/fstr.8.85
复制
发表时间：
2002
影响因子：
0.6
通讯作者：
R. Matsuno
中科院分区：
文献类型：
--
作者：
Eiichiro Ishido;K. Hakamata;Y. Minemoto;S. Adachi;R. Matsuno
采用自催化型动力学模型，对不同配比的阿拉伯胶或麦芽糊精包覆亚油酸喷雾干燥氧化过程进行了分析，模型中自催化型动力学速率常数的活化自由能服从高斯分布。该模型能较好地描述亚油酸的氧化过程，且亚油酸包封率越高，对应于平均活化自由能k的速率常数越大。将不同粒径的亚油酸和麦芽糊精水溶液乳化，喷雾干燥制备微胶囊。利用该模型计算了微胶囊内亚油酸的氧化过程。对于具有较小直径的乳液，k值较小。
The oxidation processes of linoleic acid encapsulated with gum arabic or maltodextrin at various weight ratios by spray-drying were analyzed using the model in which the free energy of activation for the rate constant of the autocatalytic type kinetics was assumed to obey a Gaussian distribution. The model could well express the oxidation processes, and the rate constant corresponding to the mean value of the free energy of activation, k, was greater for linoleic acid encapsulated at the higher weight ratio. Emulsions of linoleic acid and maltodextrin solution with different diameters were spray-dried to prepare the microcapsules. The oxidation processes of linoleic acid within the microcapsules were also calculated using the model. The k value was smaller for the emulsion with a smaller diameter.