纳米羟基磷灰石/壳聚糖-明胶复合微球的制备及性能

被引:18
作者
黄大建
张文熊
刘晶冰
井淇
机构
[1] 北京工业大学材料科学与工程学院
关键词
纳米羟基磷灰石; 壳聚糖; 明胶; 庆大霉素; 骨修复;
D O I
暂无
中图分类号
R318.08 [生物材料学];
学科分类号
100103 [病原生物学];
摘要
背景:羟基磷灰石与高分子复合材料作为组织工程材料的报道很多,但多为粉体材料或块状材料,用于修复治疗时均存在一定的局限性。目的:制备纳米羟基磷灰石/壳聚糖-明胶复合缓释微球,观察其体外释药特性。设计、时间及地点:重复测量设计,于2008-01/10在北京工业大学材料科学与工程学院生物功能高分子实验室完成。材料:纳米羟基磷灰石、壳聚糖、明胶、庆大霉素。方法:利用微波辅助法,在pH=7的条件下,制备了针状羟基磷灰石。采用W/O型复乳化-交联技术制备纳米羟基磷灰石/壳聚糖-明胶载药复合微球。主要观察指标:①纳米羟基磷灰石/壳聚糖-明胶复合微球的表面形貌、粒径分布。②载药复合微球的载药量、包封率及药物累积释放率。结果:①纳米羟基磷灰石/壳聚糖-明胶载药复合微球形态均匀,其粒径主要集中在10~30μm,壳聚糖-明胶对羟基磷灰石形成了很好的包覆。②复合微球平均载药量32.97%,平均包封率49.20%,在3d内对庆大霉素的释放达到88%左右。结论:所制备的纳米羟基磷灰石/壳聚糖-明胶载药复合微球形态均匀,粒径分布窄,再分散性好,3d内能维持有效的药物浓度。
引用
收藏
页码:3097 / 3100
页数:4
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