山东大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (3): 106-111.doi: 10.6040/j.issn.1672-3961.0.2015.395
李成峰,刘群,王文浩,王百威,杨赞中
LI Chengfeng, LIU Qun, WANG Wenhao, WANG Baiwei, YANG Zanzhong
摘要: 采用改性的Pechini方法在含亚甲基蓝(methylene blue, MB)的二氧化硅颗粒(silica-MB)表面沉积磷酸八钙(octacalcium phosphate, OCP)后制备得到silica-MB@OCP,研究制备工艺条件对载药颗粒的结构、药物释放行为和载体降解性能的影响规律。研究发现聚乙二醇(polyethylene glycol, PEG)的分子量、PEG和柠檬酸的添加量对载药颗粒的物相、化学组成和形貌有显著影响。MB释放量和单体/二聚体的比例随时间的变化规律都对载药颗粒的结构和溶液pH值条件敏感,这与MB分子扩散行为受OCP壳层的结构和溶液条件影响有关。相比于silica-MB, silica-MB@OCP在磷缓冲液和lysosome-like缓冲液中的降解比例要高得多,这是由于MB扩散行为对颗粒结构的破坏产生显著影响导致的。
中图分类号:
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