采用水-油-水双乳化溶剂挥发法制备了聚乳酸-羟基乙酸共聚物(PLGA)/氧氟沙星载药微球,并考察了介孔硅、透明质酸、多聚赖氨酸不同内水相成分对微球粒径及其分布、表面形态、包封率以及释放特性的影响.研究结果表明,采用该方法制备出了内部具有多孔结构的载药微球；透明质酸内水相组微球平均粒度最大,粒径分布最小；介孔硅和透明质酸的加入提高了微球包封率；3种内水相组的初期爆释均高于对照组；多聚赖氨酸内水相组释放速率最快,透明质酸内水相组释放速率最慢.释放拟合曲线表明,4组不同内水相的微球,在释放区间内,释放行为都符合Slogistic方程式.
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