为了改善羟基磷灰石(HAP)的脆性和新骨诱导性,采用共沉淀法合成HAP,盐溶法制备丝素蛋白(SF),在胶体状态下将HAP和SF复合得到了SF/HAP复合材料.采用扫描电镜(SEM)、X射线衍射(XRD),傅立叶红外光谱(FIR)对复合材料结构和化学组成进行了分析,在模拟体液中检验了复合材料的生物活性,并对其抗压强度进行了测定.结果表明:HAP与SF在纳米尺度进行了复合,复合材料中SF主要以β-折叠构象存在,酰胺Ⅴ红外特征峰消失,β-折叠构象的其他峰发生了移动,表明HAP与SF间存在化学结合;模拟体液中浸泡18天后,复合材料表面形成了片层状的HAP;与纯的HAP晶体比较,复合材料结构稳定,具有较好生物活性和骨诱导性,其抗压强度可达63 MPa,可望成为理想的骨组织替换和工程支架材料.
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