摘要
采用预聚-扩链-中和-分散法合成PU水溶液,将PU、ST、SA溶液按质量比1:1:1、1:1:2、1:1:3进行复合,通过凝聚相分离法制备复合微球。由红外光谱分析样品的化学结构,发现PU与ST和SA之间通过氢键作用复合;由SEM观测微球表面及剖面的形态结构,发现复合微球平均粒径约为2-3mm,表面光滑且内部有很多均匀致密的管状孔隙,适合用作药物释放载体材料;血液相容性测试结果表明,复合微球的动态凝血时间、溶血率以及血小板消耗率均达到了与血液接触材料的国家标准,说明PU/ST/SA复合微球具有良好的血液相容性。
The study was aimed at obtaining favourable PU/ST/SA complex microspheres for drug controlled delivery system. First PU anionic solution was synthesized by the prepotymeization, chain-extension, neutralization, dispersion method. Subsequently PU solution and ST, SA solutions were completely mixed with different quality rate (1 : 1 : 1,1 : 1 : 2,1 : 1 : 3), which was trickled to shape complex microspheres. FTIR results show that they make interaction through hydrogen bond. SEM results show that the average diameter of the completely microspheres is about 2-3mm and they are smooth sphericity, the surfaces are provided with porosity. It can be used as carrier materials for drug delivery. Hemocompatibility test results show that PU/ST/SA complex microspheres have good hemocompatibility.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2011年第4期30-32,36,共4页
Materials Reports
基金
国家大学生创新性实验计划项目(091061347)
中央高校基本科研业务费专项资金(SWJTU09CX0622010ZT09)
四川省应用基础研究基金(07JY029-065)
关键词
聚氨酯
淀粉
海藻酸钠
血液相容性
polyurethane(PU), starch(ST), sodium alginate(SA), hemocompatibility