摘要
以明胶和羧甲基纤维素为壁材,使用复凝聚法和冷冻干燥法制备维生素A微胶囊。采用单因素和响应面法确定最佳制备条件,并对其形态、结构、热稳定性和储藏稳定性进行表征。结果表明,复凝聚最佳pH为3.5,壁芯比为8∶1,蔗糖酯添加量为3.08%,添加12.33%的谷氨酰胺转氨酶,包埋率为78.91%。通过光学显微镜观察到微胶囊呈完整球形,扫描电子显微镜观察到其表面完整无裂痕,FT-IR分析推测明胶中的—NH^(3+)与羧甲基纤维素中的—COO-通过静电相互作用,热重分析表明壁材对微胶囊中的维生素A具有良好的保护作用,热稳定性提高到178.8℃。在贮藏过程中,微胶囊化维生素A可有效降低游离脂肪酸和醛类的含量。
Using gelatin and carboxymethyl cellulose as wall materials,vitamin A microcapsules were prepared by complex coagulation method and freeze-drying method.The optimal preparation conditions were determined by single factor and response surface methodology,and their morphology,structure,thermal stability and storage stability were characterized.The results showed that the optimal conditions were as follow:the complex coagulation pH of 3.5,the wall core ratio of 8∶1,the sucrose ester content of 3.08%,the glutamine transaminase content of 12.33%.In the conditions,the embedding rate was 78.91%.The microcapsules were complete spherical observed by optical microscope,and their surface were complete without cracks observed by SEM.FT-IR result showed that—NH^( 3+)in gelatin interacted with—COO-in carboxymethyl cellulose through electrostatic interaction.Thermogravimetric analysis showed that the wall material had a good protective effect on vitamin A in the microcapsules,and the thermal stability was improved to 178.8℃.During storage,microencapsulations of vitamin A can effectively reduce the content of free fatty acids and aldehydes.
作者
李悦
王帆帆
臧敏
叶淑红
郑思洋
LI Yue;WANG Fanfan;ZANG Min;YE Shuhong;ZHENG Siyang(School of Food Science and Technology,Dalian Polytechnic University,Dalian 116034,China)
出处
《大连工业大学学报》
CAS
北大核心
2023年第4期235-241,共7页
Journal of Dalian Polytechnic University
基金
国家自然科学基金项目(32171836)
辽宁省自然科学基金项目(LJKZ0538,2020-MZLH-37).
关键词
维生素A
复凝聚
微胶囊
稳定性
vitamin A
complex coacervation
microcapsules
stabilit
