HAP／UHMWPE生物复合材料的制备与微观结构  

Preparation and microstructure of hydroxyapatite / ultra high molecular weight polyethylene composite biomaterial

作　　者：张斌[1] 周科朝[2] 黄苏萍[2] 朱武[2] 

机构地区：[1]湖南大学材料科学与工程学院,湖南长沙410082 [2]中南大学粉末冶金国家重点实验室,湖南长沙410083

出　　处：《功能材料》2007年第A05期1742-1745,共4页Journal of Functional Materials

基　　金：国家高技术研究发展计划（863计划）资助项目（2003AA302210）;湖南省自然科学基金资助项目（04JJ3083）;中南大学创新工程基金资助项目（030615）

摘　　要：通过化学共沉淀．水热合成法制备纳米级羟基磷灰石（HAP），再用自制模具制备出羟基磷友石／超高分子量聚乙烯（UHMWPE）复合材料．通过SEM观察、X射线分析、DSC测试、热重分析以及力学性能测通过其超长分子链获得网状结构，为材料提供机械强度，HAP在复合材料中试，研究了HAP／／UHMWE复合材料的微观组织和力学性能．结果表明：UHMWPE分布比较均匀，并被包裹在UHMWPE超长细链形成的层层网状结构之中．随着HAP含量的增加，复合材料的熔点下降，熔融热焓有所降低，UHMWPE的结晶度降低了．随着HAP体积含量的增加，复合材料的拉伸强度和抗弯强度均下降，从30．1MPa降到21．5MPa以及从63．1IMPa降到46．7MPa，而弹性模量有所上升，从1．6GPa上升到4．1GPa．Nano HAP particles were made by coprecipitation and hydro-thermal synthesis, and hydroxyapatite （HAP）/ ultra high molecular weight polyethylene （UHMWPE） composites were prepared by self-made mould. Microstructures and mechanical properties were described by SEM observation, DSC and X-ray analyses, thermo gravimetric analysis, buring test and mechanical properties test. The results show that UHMWPE affords the mechanical strength of the material through mesh structures formed by its super long molecular chain, HAP is evenly distributed in the composite, and is wrapped in the layer mesh structure formed by UHMWPE. With the increase of HAP of volume ratio, melting points, melting energies and crystallization degrees all decrease, tensile strength and bending strength of the material decrease from 30.1 to 21.5MPa and from 63.1 to 46.7MPa, but elastic modulus increases form 1.6 to 4.1GPa.

关 键 词：羟基磷灰石(HAP) 超高分子量聚乙烯 (UhMWPE) 力学性能 微观结构 

分 类 号：TQ325.1[化学工程—合成树脂塑料工业]