壳聚糖/海藻酸钠自组装微球的制备及释药性能
Preparation of Chitosan/alginate microspheres by layer-by-layer self-assembly method and in vitro drug release
作者:李华;史国齐;万昌秀;
Author:
收稿日期: 年卷(期)页码:2008,(03):-249-252
期刊名称:华西药学杂志
Journal Name:WEST CHINA JOURNAL OF PHARMACEUTICAL SCIENCES
关键字:壳聚糖;海藻酸钠;四环素;自组装;释药性能
Key words:
基金项目:国家自然科学基金资助项目(批准号:3037041150472091)
中文摘要
目的利用壳聚糖(CS)聚阳离子及海藻酸钠(ALG)聚阴离子电解质的性质,在药物微球表面自组装形成多层包覆结构的壳聚糖载药微球,并研究组装层数、温度及盐离子浓度对自组装微球释药性能的影响。方法采用乳化交联法制备CS载四环素(TC)的药物微球,并在其表面交替自组装ALG及CS。利用IR测试技术及电极电位法进行表征。结果CS交联微球未破坏CS及TC的结构,CS与ALG以静电作用相结合。CS交联微球的载药量为40.2%,自组装六层的微球载药量为32%。组装后,药物释放时间延长,初期暴释现象得到极大改善,释药速率随组装层数的增加而下降,温度较高时组装完整,盐离子浓度存在较佳点。结论温度为60℃、盐离子浓度为0.5 mol.L-1、组装层数为四层的微球释药性能较佳。
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