硅酸盐水泥在模拟体液中降解和矿化性能  

Degradability and biomineralization ability of Portland cement in simulated body fluid

作　　者：陈耀忠[1,2] 吕晓迎[1] 刘根娣[2] 

机构地区：[1]东南大学生物电子学国家重点实验室,南京210096 [2]东南大学附属中大医院,南京210009

出　　处：《东南大学学报（自然科学版）》2014年第2期328-332,共5页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(30270391);全国高等学校博士点基金资助项目(20100092110027);江苏省自然科学基金资助项目(BK2007109);东南大学生物电子学国家重点实验室开放研究基金资助项目(2011E15)

摘　　要：为了检测硅酸盐水泥(PC)在模拟体液(SBF)中降解和生物矿化性能,将硅酸盐水泥样品分别浸泡于模拟体液3,7及14 d后,采用X射线衍射仪(XRD)、傅里叶红外光谱(FTIR)及扫描电镜(SEM)等方法研究其生物矿化性能;并同时检测其失重率及模拟体液浸泡液的pH值变化情况.研究结果发现:随着浸泡时间的增长,硅酸盐水泥的质量增加;模拟体液在浸泡前3 d碱性较强,随后其pH值逐渐降低.X射线衍射、红外光谱图谱及扫描电镜图像表明:硅酸盐水泥浸泡3 d后,在其表面有碳酸钙生成;浸泡7 d后,其表面有碳酸羟基磷灰石生成.因此,硅酸盐水泥具有良好的生物矿化能力.To investigate the degradability and biomineralization ability of Portland cement （PC ）, samples of PC were immersed in simulated body fluid （SBF）for 3,7 and 14 d respectively.X-ray diffraction （XRD）,a Fourier transform infrared spectrophotometer （FTIR）and a scanning electron microscope （SEM）were used to investigate the biomineralization ability of PC;meanwhile,the weight loss of the samples and the pH value changes of their immersion media were monitored.The results show that with the soaking time prolonged,the weight of PC increases.The immersion media has a high alkalinity in the first three days,and then,the pH value declines.The XRD and FTIR patterns and the SEM images show that in SBF for 3 days,calcium carbonate is formed on the sur-face of PC and for 7 days carbonated hydroxyapatite is formed.Therefore,PC displays good biomin-eralization ability in SBF.

关 键 词：硅酸盐水泥 降解 生物矿化 模拟体液 碳酸羟基磷灰石 Portland cement (PC) simulated body fluid (SBF) 

分 类 号：TQ172.71[化学工程—水泥工业]