Si-HA纳米粉体的超声共聚法制备及其骨水泥的力学性能

ULTRASONIC CO-DEPOSIT FABRICATION OF SI-HA NANOPOWDER AND MECHANICAL PERFORMANCE OF ITS BiO-CEMENT

采用超声共聚法制备含硅羟基磷灰石Si-HA纳米粉体,并用柠檬酸与丙烯酸制成的固化液与之按一定比例调制成含硅羟基磷灰石骨水泥Si-HAC。采用XRD和FESEM对Si-HA纳米粉体的晶相、粒度、结构和表面形貌进行分析表征,并用万能材料试验机测定了所得Si-HAC骨水泥的力学性能。研究结果表明,将硅源TEOS加入到具有较强碱性的Ca(OH)2氨水前驱液中,能有效避免TEOS的水解漂浮,使钙硅均匀混合;将超声空化作用施加于Ca(OH)2和H3PO4外加硅源的反应体系,进行超声共聚,能够有效防止次生相的形成,合成纳米粉体纯度高,结晶细腻而均匀;将硅掺杂的Si-HA纳米粉体与柠檬酸/丙烯酸固化液调制成Si-HAC骨水泥能有效提高其力学性能,尤以4%Si最佳。

ilicon-substituted hydroxyapatite（Si-HA） nanopowder was fabricated through co-deposit method with ultrasonic application,and citric acid /acrylic acid was used to prepare solidification liquid in this paper.The nanopowder and the liquid were adjusted to form Si-HAC bio-cement according to a definite ratio.The crystalline phase,grain dimension and morphology of the Si-HA nanopowder were represented and observed by XRD and FESEM.The Si-HAC was also examined for mechanical performance.The obtained results demonstrate that the TEOS addition into alkaline Ca（OH）2 and ammonia liquid can obviously eliminate its hydrolysis and make the silicon and calcium source uniformly mixing.The application of ultrasonic co-deposition to the reaction system of Ca（OH）2,H3PO4 and silicon source can effectively prevent secondary phase formation and make the product nanopowder fine and uniform.The citric acid /acrylic acid adjusted Si-HAC bio-cement shows an increase of mechanical strength with the increase of silicon substitution,the most favorite around 4%Si addition.