反溶剂法制备肉桂醛/乙基纤维素微胶囊及其表征

被引:14
作者
杨辉
高红芳
机构
[1] 陕西科技大学食品与生物工程学院
关键词
肉桂醛; 乙基纤维素; 微胶囊; 反溶剂法;
D O I
10.16865/j.cnki.1000-7555.2017.07.021
中图分类号
TQ651 [香料化学];
学科分类号
0817 ;
摘要
采用反溶剂法,以肉桂醛为芯材,乙基纤维素(EC)为壁材制备肉桂醛微胶囊,研究了不同芯壁比对微胶囊包埋率及形貌的影响;采用扫描电镜对所得微胶囊的表面形貌进行观察,借助红外光谱和热重分析等对其形成机理能进行了分析,并对其缓释性进行了测试。结果表明,当芯壁比为1∶3时包埋率最大,达到83%,载药量为21%,微胶囊为分散性好、粒径200 nm1μm的球形粒子。红外光谱、热重分析结果表明EC可以通过自组装将肉桂醛包裹于其形成的疏水性空腔内部。微胶囊存放7 d后,其中的肉桂醛释放率仅为23%,而肉桂醛混合物中肉桂醛的释放率达到了54%,表明肉桂醛微胶囊具有一定缓释性。
引用
收藏
页码:121 / 125
页数:5
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