聚乙烯吡咯烷酮对纳米羟基磷灰石形貌的影响及其机理分析  

Preparation and mechanism of oval-shape hydroxyapatite modificated by polyvinylprrolidone

作　　者：朱军[1] 李志友[1] 黄苏萍[1] 张海斌[1] 陈哲东[1] 周科朝[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2011年第5期742-746,共5页Materials Science and Engineering of Powder Metallurgy

基　　金：国家自然科学基金资助项目(51102285);中南大学前沿计划重大项目(201022100002)

摘　　要：以Ca(NO3)2.4H2O,(NH4)2HPO4为反应物,聚乙烯吡咯烷酮(PVP)为添加剂,在水热条件下,成功制得了椭球状(长径比1-1.5)的纳米羟基磷灰石(HA)。采用X射线衍射(XRD)、傅里叶变换红外吸收光谱(FTIR)和透射电子显微镜(TEM)等测试手段对所制得的纳米HA进行表征,结果表明PVP能较大程度地影响纳米HA的形貌。纳米HA颗粒的长径比随着PVP浓度的增加而减小,当PVP浓度为1.0%(质量分数)时,纳米HA长径比达最小值(1.5左右)。PVP对纳米HA形貌的调控机制可能是Ca2+与PVP形成配位键和PVP在纳米HA上吸附2种机理协同作用的结果。The oval-shaped nano-hydroxyapatite（HA） was synthesized successfully with Ca（NO3）2？4H2O,（NH4）2HPO4 as raw material by adding polyvinylprrolidone（PVP） reagent,and the crystal phase,chemical composition,morphology of HA was characterized by X-Ray diffraction（XRD） analysis,Fourier transform infrared spectroscopy（FTIR） and transmission electron microscopy（TEM）.The results show that PVP can affect the morphology and aspect ratio of nano-hydroxyapatite（nHA） to a large extent.At the PVP concentration of 1.0%,the oval-shape nHA with 20~30 nm diameter can be synthesized and the ratio of length to radius decreased from 5 to 1.5.The mechanism of forming oval-shaped nanoHA may be related to a chemical bonding between Ca2＋ and PVP or the adsorption of PVP on nano-HA.

关 键 词：纳米羟基磷灰石 水热合成 聚乙烯吡咯烷酮 椭球状 

分 类 号：TQ126.39[化学工程—无机化工]