钛金属表面不同预处理沉积生物活性硅酸钙  

Bioactive Calcium Silicate Deposition on Titanium Surfaces Using Different Pretreatments

作　　者：许健伟 张文博[1] 庄明辉[1] 李洪波[1] 王静[1] XU Jian-wei;ZHANG Wen-bo;ZHUANG Ming-hui;LI Hong-bo;WANG Jing(School of Materials Science and Engineering,Jiamusi University,Jiamusi 154007,China)

机构地区：[1]佳木斯大学材料科学与工程学院,黑龙江佳木斯154007

出　　处：《佳木斯大学学报（自然科学版）》2018年第5期735-738,共4页Journal of Jiamusi University：Natural Science Edition

基　　金：国家自然科学基金(No.31370979);黑龙江省自然科学基金重点项目(ZD2016-001);黑龙江省大学生科技创新项目(201510222060);佳木斯大学科技创新团队(kjcxtdpy01)

摘　　要：利用酸蚀法和微弧氧化法分别对医用钛金属表面进行处理,再经聚多巴胺表面活化修饰后,利用水热沉积法制备硅酸钙生物活性涂层,并研究聚多巴胺对经不同表面处理的医用钛金属生物诱导沉积CaSiO3能力的影响;采用扫描电子显微镜(SEM)及附带的能谱仪(EDS)和X射线衍射仪(XRD)对经不同表面预处理及其生物诱导沉积硅酸钙涂层的表面形貌、元素组成和相结构进行表征分析,划痕法测试涂层与基体结合力;利用接触角研究表面润湿性。结果表明:酸蚀和微弧氧化处理后的钛金属表面分别形成了沟壑状和微米孔状结构;微弧氧化再经聚多巴胺活化修饰后水热沉积,可以显著提高硅酸钙涂层的生物诱导沉积能力,硅酸钙的排列更致密、均匀,涂层与基体间结合力、润湿性改善。This study focused on the effects of polydopamine （PDA） coating on the bio-induced deposition of calcium silicate on the surface of medical titanium （Ti） pretreated by acid etching and microarc oxidation （MAO）. Ti metal was firstly pretreated, and then modified with PDA coating; that after, all samples were immersed into the mineralizing solution in reaction kettle for depositing calcium silicate bioactive coatings at 220°C. The morphologies, elemental compositions and microstructures were characterized by scanning microscopy （SEM）, X-ray energy dispersive spectrometer （EDS）, X-ray diffraction （XRD）. The bonding force between coatings and substrate material was measured by scratching experiment. Upon pretreatment of acid etching and MAO, ditch shape and micron-sized porous structure were formed on Ti surfaces, respectively. After being further modified by PDA, the deposition ability of calcium silicate on Ti surfaces was significantly improved, and the arrangement of calcium silicate was relatively compact and ordered and bonding force as well as wettability was also increased.

关 键 词：钛金属 表面处理 聚多巴胺 硅酸钙 

分 类 号：TG146.2[一般工业技术—材料科学与工程]