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在纯钛基体表面通过电泳沉积的方法制得壳聚糖/羟基磷灰石(CS/HA)复合涂层,然后将复合涂层烧结形成多孔HA涂层。采用SEM对多孔HA涂层的形貌进行观察,XRD分析涂层的物相组成,粘结-拉伸实验测定涂层与基体的结合强度,1.5倍人体模拟体液(1.5SBF)浸泡测定涂层的生物活性。结果表明:当悬浮液中CS与HA质量比为1∶1时,制得的CS/HA复合涂层经过700℃烧结处理,涂层中CS热分解致孔形成多孔HA涂层,孔径在10～25μm,涂层与基体的结合强度可达19.5 MPa;在1.5SBF中浸泡5天后,多孔HA涂层表面完全碳磷灰石化,呈现较好的生物活性。
Chitosan / hydroxyapatite (CS / HA) composite coating was prepared by electrophoretic deposition on the surface of pure titanium matrix. The composite coating was then sintered to form a porous HA coating. Morphology of the porous HA coating was observed by SEM. The phase composition of the coating was observed by XRD. The bonding strength between the coating and the substrate was measured by the bond-tension test. The coating was immersed in 1.5 times human simulated body fluid (1.5SBF) Biological activity. The results show that when the mass ratio of CS to HA in the suspension is 1: 1, the prepared CS / HA composite coating is sintered at 700 ℃, and the porous layer of HA coating is formed by thermal decomposition of CS in the coating with a pore size of 10 ~ 25μm, the bonding strength between the coating and the substrate can reach 19.5 MPa; after soaking in 1.5SBF for 5 days, the surface of the porous HA coating is fully carbonated apatite, showing good biological activity.