微弧氧化法制备镁基羟基磷灰石/碳纳米管复合生物涂层及其性能研究  

Synthesis and properties of hydroxyapatite/CNTs composite coating on magnesium alloy by micro-arc oxidation

作　　者：夏承森 温翠莲[1] 詹晓章 黄小桂[1] 罗立津[2] 

机构地区：[1]福州大学材料科学与工程学院,福州350108 [2]福建省微生物研究所,福建省新药(微生物)筛选重点实验室,福州350007

出　　处：《科技导报》2016年第8期60-66,共7页Science & Technology Review

基　　金：国家自然科学基金项目(51301039);教育部留学回国人员科研启动基金项目(LXKQ201305);福州大学科技发展基金项目(2012-xy-1)

摘　　要：通过化学沉淀法制备了羟基磷灰石/碳纳米管纳米(HA/CNTs)复合粉体,并作为电解液的添加剂,采用微弧氧化方法(MAO)制备了镁合金表面MAO/HA/CNTs复合活性涂层。分别采用扫描电子显微镜(SEM)、X射线衍射分析(XRD)、傅里叶红外光谱(FTIR)和电化学工作站,研究所制备的复合粉体的形貌和物相组成、复合粉体对微弧氧化涂层表面形貌和在模拟体液(SBF)中耐腐蚀性能和生物活性的影响。结果表明,所制备的HA/CNTs复合粉体结晶良好,无其他杂质相;复合粉体在微弧氧化过程中沉积在样品表面,对微弧氧化涂层起到封孔作用。MAO/HA/CNTs样品的腐蚀电位为-1.50 V,经过30天的SBF浸泡后,表面沉积了大量的亚微米级别的颗粒沉积物,相比于镁基体和MAO样品具有更好的生物活性和耐腐蚀性。MAO/HA/CNTs composite coating is synthesized on magnesium alloy by micro arc oxidation（MAO） with Hydroxyapatite/CNTs（HA/CNTs） nano composite powders as additives,which is obtained by chemical precipitation method.SEM,XRD,FTIR and electrochemical workstation are adopted to investigate morphology and phase composition of as-prepared composite coating,corrosion resistance and bioactivities of samples in SBF solutions.The results show that the prepared HA/CNTs composite powders are well crystallized and without any impurities.The HA/CNTs can be deposited on the surface of samples successfully during MAO process,sealing the holes of MAO coating.Moreover,the corrosion potential of MAO/HA/CNTs modified samples is-1.50 V;the surface is deposited by a large number of submicron scale particles after soaking in SBF for 30 days,which shows better biological activity and higher corrosion resistance compared with Mg substrate and MAO modified samples.

关 键 词：羟基磷灰石 碳纳米管 镁合金 微弧氧化 生物涂层 

分 类 号：R318.08[医药卫生—生物医学工程]