聚乙二醇对不同粒度羟基磷灰石的表面修饰

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将聚乙二醇(polyethylene glycol,PEG)聚合物分别溶于含微米级的羟基磷灰石(micro-sized hydroxyapatite,m-HA)及纳米级的羟基磷灰石(nano-sized hydroxyapatite,n-HA)颗粒的水溶胶中,均匀分散后水洗,经冷冻干燥分别获得不同粒度的改性粉体.红外光谱分析显示:改性处理后2种粒度的HA粉体都含有PEG修饰剂.热重分析表明:经过800℃处理的n-HA粉体含有质量分数为3.05%的PEG,比同样改性处理的m-HA的少.X射线衍射分析表明:相
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