原位生长碳纳米管增强含氟羟基磷灰石涂层研究

项目名称： 原位生长碳纳米管增强含氟羟基磷灰石涂层研究

项目编号： No.51202194

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 无机非金属材料学科

项目作者： 张磊磊

作者单位： 西北工业大学

项目金额： 24万元

中文摘要： 本项目针对炭/炭复合材料骨植入体的生物惰性及释放碳微粒的问题，提出并开发一种原位生长碳纳米管增强含氟羟基磷灰石涂层，涂层制备包括三个主要步骤：首先在炭/炭复合材料表面预沉积类金刚石碳层，用于消除炭/炭复合材料的碳纤维、碳基体和孔洞的微观结构差异，为后续碳纳米管的生长提供均匀致密的表面状态，同时也用于阻挡碳微粒的释放；其次采用化学气相沉积工艺在预沉积类金刚石碳层的表面原位生长碳纳米管；然后采用超声电沉积及离子交换复合工艺制备含氟羟基磷灰石，使之逐步填充入碳纳米管之间的孔隙并均匀覆盖材料表面，最终形成原位生长碳纳米管增强含氟羟基磷灰石涂层。明确该涂层的制备工艺和微观结构之间的关系，构建涂层的形成过程物理模型及生长动力学方程，阐明原位生长碳纳米管在涂层中的增强机理，揭示涂层的细胞学行为及动物体内的骨组织响应行为，从而为表面活化改性炭/炭复合材料骨植入体的广泛临床应用奠定理论基础。

中文关键词： 炭/炭复合材料；羟基磷灰石；碳泡沫；纳米管；

英文摘要： To solve the problems of bioinert and the release of carbon debris of biomedical carbon/carbon composite implants, in situ grown of carbon nanotube reinforced fluoridated hydroxyapatite coatings for carbon/carbon composites are proposed. The main procedures for preparing the coatings are composed of three steps: firstly, the diamond like carbon coatings are applied for carbon/carbon composites with an aim of decreasing the release of carbon debris and eliminating the microstructure difference among carbon fiber, carbon matrix and holes. A dense and uniform surface for the growth of carbon nanotubes is obtained after the coatings being prepared. Secondly, in situ grown carbon nanotubes are prepared on diamond like carbon coatings by chemical vapour deposition technique. Thirdly, the fluoridated hydroxyapatites are prepared by ultrasonic electrochemical deposition and ion exchange methods. The fluoridated hydroxyapatites will fill and cover the carbon nanotubes uniformly, forming carbon nanotube reinforced fluoridated hydroxyapatite coatings. The technique and microstructures of the bioactive coatings will be studies with the physical model and growth kinetic equation being proposed. The reinforcement mechanism of the in situ carbon nanotube will be discussed. The bioactivity of the coatings will be analyzed by bo

英文关键词： carbon/carbon composites；hydroxyapatite；carbon foam；nanotube；