以化学沉淀法合成了双相磷酸钙(BCP)生物陶瓷粉末,以辛酸亚锡为催化剂,用丙交酯对BCP粉体进行表面接枝改性.通过X衍射分析(XRD)、化学分析、激光粒度分析、扫描电镜观测、红外光谱分析(FTIR)、热重分析等手段对改性前后粉体特性进行了研究;结果发现合成的BCP粉体双相晶型结构良好,HA/β-TCP比例为5.5:4.5,Ca/P=1.54,中位径D50为1.5μm,颗粒近似球形,一次颗粒粒径0.5～0.8μm;BCP表面改性后粉体表面形貌变为不规则且包覆片层状晶片,丙交酯通过开环聚合接枝在无机粉体表面的羟基基团上(通过化学键合形成羧酸钙等基团)成为低聚聚乳酸,粉体表面有机基团接枝量为5%(质量分数,下同).
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