碱金属元素掺杂比例对聚磷酸钙降解和矿化性能的影响  

Effects of Doping Alkaline Metal Proportion on Degradation and Mineral Precipitation of Calcium Polyphosphate

作　　者：宋巍[1] 徐源廷[1] 贾二鹏[1] 孙慧敏[1] 何冠松[1] 田野菲[1] 余喜讯[1] 

机构地区：[1]四川大学高分子科学与工程学院,四川成都610065

出　　处：《四川大学学报（工程科学版）》2009年第6期124-129,共6页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(30870616);江苏省自然科学基金资助项目(BK2008152);四川省科技厅应用基础研究项目(07JY029-075);四川大学创新型实验计划重点项目

摘　　要：用不同比例的碱金属钾(K)和钠(Na)对聚磷酸钙(CPP)进行掺杂改性以期研究其降解与矿化性能。掺杂CPP样品在模拟体液(SBF)中分别浸泡1、2、3、7、14、21、28和35 d,研究其降解和矿化性能。通过测量降解样品的失重率,SBF中Ca2+和PO43-的浓度和pH值的变化来表征降解速率。掺杂CPP样品通过X射线衍射法(XRD)、傅里叶红外变换光谱法(FTIR)和扫描电镜(SEM)进行表征。结果显示掺杂摩尔比高于5%的CPP降解速率明显提高。K+和Na+掺杂比越高越能有效提高CPP的降解和矿化能力。Calcium polyphosphates(CPP)were modified by doping alkali metals ions(K+ and Na+) with different proportions to study its degradability and mineralization ability.Doped CPP samples were immersed in simulated body fluids(SBF) during 1,2,3,7,14,21,28 and 35 days to study the degradability and mineralization ability.The weight loss of degraded samples,Ca2+ and PO43-concentrations change,and pH value in SBF were measured to characterize the degradability.Doped CPP samples were characterized by XRD,FTIR and SEM....

关 键 词：聚磷酸钙 碱金属 掺杂 降解 矿化沉积 

分 类 号：R318.08[医药卫生—生物医学工程]