Synthesis of Biomimetic Hydroxyapatite in Syntetic Body Fluids

摘要：

　　In this study,biomemitic hydroxyapatite was prepared as a nano-sized powder from calcium nitrate tetrahydrate and diammonium hydrogen phosphate salts,but using the different contents of PVP modified hydroxyapatite and synthetic body fluid (SBF) solutions as synthesis medium instead of pure water at 37.4C and pH of 7.4.SBF was prepared in accord with the chemical analysis of human body fluid,with ion concentrations nearly equal to those of the inorganic constituents of human blood plasma.Characterization and chemical analaysis of the synthesized biomemitic hydroxyapatite powders and pure hydroxyapatite were investigated by X-ray powder diffraction,scanning electron microscopy,and inductively coupled plasma atomic emission spectroscopy.Rheological properties of HAP sol which reflected the interaction ofhydroxyapatite particles were measured by R/S rheometer.The results showed that PVP evidently affected the stability and rheological properties of HAP sol,and PVP were based on the different mechanism at different concentrations.PVP was operating as an interparticle bridging reagent at low concentrations(0.5%),while it acted as an dispersant at high concentrations(2.0%).The biomemitic hydroxyapatite with the sizes of 10~30nm was spherical and poor crystalline,which was synthesized in synthetic body fluid (SBF) by addition of 2.0% PVP.

关键词： HAP PVP Modified Rheological Properties

作者: Zhaoyi Yin Chengyun Ning Wenjun Zhu Hao Chen Haimei Cheng Shumei Lei Shiheng Yin Huade Zheng

作者单位: College of Materials Science and Technology,South China University of Technology,Guangzhou 510641,Ch College of Materials Science and Technology,South China University of Technology,Guangzhou 510641,Ch Guanghua School of Stomatology,Sun Yat-sen University,Guangzhou 510060,China Wenzhou Medical College,Wenzhou 325035,China College of Materials Science and Technology,South China University of Technology,Guangzhou 510641,Ch

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 1169-1171

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）