通过熔融缩聚法制备了纳米羟基磷灰石(n-HA)/聚1,2-丙二醇-癸二酸-柠檬酸酯(1,2-PPSC)生物弹性体复合材料.用红外光谱(FTIR)和固体核磁共振光谱(13C NMR)对复合材料的化学结构进行表征,用扫描电子显微镜(SEM)和透射电镜(TEM)对n-HA的形态及其在基体中的分散性进行表征.结果表明,n-HA与癸二酸没有发生化学反应,n-HA与1,2-PPSC基体无明显化学键生成,n-HA均匀分散在1,2-PPSC基体中.动态力学性能(DMA)的测试结果表明,n-HA与1,2-PPSC基体之间生成了良好的界面结合.差示扫描量热(DSC)分析和DMA的测试结果表明,n-HA/1,2-PPSC复合材料玻璃化转变温度(Tg)随着n-HA质量分数的增加而降低,这是由于n-HA影响了聚合物酯化反应的进行,导致化学交联密度降低.n-HA的加入提高了复合材料的亲水性,降低了复合材料的吸水率,减缓了复合材料的降解速率.复合材料的力学性能与基体相比有明显的提高,当n-HA质量分数为20%时,复合材料的弹性模量提高11.4倍,拉伸强度提高8.2倍,且断裂伸长率基本不变.
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