Porous Hydroxyapatite Bioceramics Prepared by Polymeric Sponge Impregnation Process
Porous Hydroxyapatite Bioceramics Prepared by Polymeric Sponge Impregnation Process
复制标题
DOI：
10.4028/www.scientific.net/kem.336-338.1612
复制
发表时间：
2007-04
期刊：
影响因子：
--
通讯作者：
Y. Lv;Mu-qin Li;H. Yang;Xiao Jie Li
中科院分区：
文献类型：
--
作者：
Y. Lv;Mu-qin Li;H. Yang;Xiao Jie Li
采用流变学优化后的浆料浸渍聚氨酯海绵制备多孔羟基磷灰石生物陶瓷。在羟基磷灰石中掺入6wt%的微晶玻璃作为烧结助剂。采用热分析方法研究了聚氨酯海绵的热分解过程。用X射线衍射和扫描电镜分别对样品的相组成和表面形貌进行了表征。结果表明，在1250°C烧结的多孔陶瓷中，羟基磷灰石是主要的相组成。所制备的多孔体具有开放、均匀、连通的结构，孔径为200-400μm。多孔陶瓷的孔隙率为70-80%，抗压强度为2.3MPa。在模拟体液中浸泡不同时间后，多孔陶瓷表面形成的沉淀物可能是类骨磷灰石。
Porous hydroxyapatite bioceramics were obtained by impregnating the polyurethane sponge with rheologically optimized slurry. 6wt% bioglass was doped into hydroxyapatite to act as a sintering additive. Thermal analysis was used to study the pyrolysis process of the polyurethane sponge. Phase component and surface morphology were characterized by X-ray diffraction and scanning electron microscopy, respectively. It was found that hydroxyapatite was the main phase composition of the porous ceramics sintered at 1250°C. The porous bodies prepared had an open, uniform and interconnected structure with pore size of 200-400μm. The porous ceramics possessed high porosity of 70-80% and compressive strength of 2.3MPa. The precipitates formed on the surface of the porous ceramics might be bone-like apatite after immersion in a simulated body fluid for various periods.