| 离子组装法构建磷灰石梯度涂层 |
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| 引用本文： | 李保强,王永亮,贾德昌,周玉.离子组装法构建磷灰石梯度涂层[J].稀有金属材料与工程,2009,38(Z2). |
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| 作者姓名： | 李保强 王永亮 贾德昌 周玉 |
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| 作者单位： | 哈尔滨工业大学,黑龙江,哈尔滨,150001 |
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| 基金项目： | 国家自然科学基金，哈尔滨工业大学科研创新基金 |
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| 摘 要： | 为了把磷灰石引入到壳聚糖材料表面,以无需任何表面功能化改性的壳聚糖水凝胶为模板,在温和条件下采用离子组装法在壳聚糖表面构建了磷灰石涂层,通过IR、XRD和SEM表征了磷灰石涂层的组成、形貌和分布规律.结果表明,采用离子组装法在壳聚糖表面形成的磷灰石为含碳酸根磷灰石(CHA),其Ca/P=2.0.在碱处理的条件下,镶嵌在壳聚糖基质中的无定形磷酸钙转变为CHA,壳聚糖水凝胶为磷酸钙提供形核位点和反应介质.CHA涂层中钙元素和磷元素含量呈现从表面向中心逐步降低,显示CHA涂层呈现梯度分布.
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| 关 键 词： | 磷灰石 壳聚糖 离子组装 矿化 |
Apatite Coating with Gradient Structure via Ion Assembly |
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| Li Baoqiang,Wang Yongliang,Jia Dechang,Zhou Yu.Apatite Coating with Gradient Structure via Ion Assembly[J].Rare Metal Materials and Engineering,2009,38(Z2). |
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| Authors: | Li Baoqiang Wang Yongliang Jia Dechang Zhou Yu |
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| Affiliation: | Li Baoqiang,Wang Yongliang,Jia Dechang,Zhou Yu (Institute for Advanced Ceramics,Harbin Institute of Technology,Harbin 150001,China) |
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| Abstract: | In order to incorporate apatite on chitosan surface,the chitosan hydrogel without any treatment for inducing functional groups modification,was used as framework of mineralization. Apatite coating on chitosan was achieved by ions assembly under ambient condition. The microstructure and components of hydroxyapatite coating was investigated by IR,XRD and SEM. Results show that the mineral was mainly composed of carbonated hydroxyapatite (CHA) with Ca/P ratio of 2.0. Amorphous calcium phosphate embedded in chi... |
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| Keywords: | apatite chitosan ions assembly mineralization |
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