摘要
采用β-环糊精、乙基纤维素作为复合壁材,单苷酯为乳化剂对茶多酚进行微胶囊化,通过正交试验确定其最佳包埋工艺条件:芯壁材比为1∶6,β-环糊精与乙基纤维素的比为4∶1,单苷酯的添加量为壁材质量的0.3%.考察了茶多酚微囊的释放性能及对大豆油自氧化的抑制活性.结果表明,茶多酚微囊在不同极性的介质中均有缓慢释放的特性,在油溶性介质中的持续释放时间最长.茶多酚微囊的形成使其抗氧化活性大大提高,添加0.02%的微胶囊茶多酚,其对大豆油的保护系数高达5.27,抗氧化活性与茶多酚相比提高了18.2%;酒石酸对茶多酚微囊的协同效应最强,增效系数为2.86.
β-cyclodextrin combinating with ethylcellulose and emulsifier is used as wall material for microencapsulating tea polyphenols and the orthogonal design method are employed to determine the optimum condition.The results show that the optimum proportion of tea polyphenols and wall material is 1∶6,the ratio of β-cyclodextrin to ethylcellulose is 4∶1,the concentration of emulsifier is 0.3% by wall material.Study on the sustained release and the antioxidative activity in the bean oil of the microcapsule tea polyphenols,the result express that the core-material of the microencapsule products have releasing property in the medium of different polarity,the lasting release in the oil dissolving medium is the longest.The PF is 5.27 when putting 0.02% tea polyphenols microencapsule into the bean oil and the antioxidation of tea polyphenols microencapsule is higher 18.2% than tea polyphenols when appending the same concentration.The microencapsule products with tartaric acid exhibited remarkable synergistic effect.
出处
《哈尔滨商业大学学报（自然科学版）》
CAS
2010年第4期400-403,共4页
Journal of Harbin University of Commerce：Natural Sciences Edition
基金
黑龙江省自然科学基金重点项目(ZJY04-08)
关键词
茶多酚
微胶囊
缓释
抗氧化特性
tea polyphenols
microencapsulation
sustained release
antioxidant properties
