采用层层自组装的方法,在羟基化和硅烷偶联剂处理的医用钛合金表面交替组装海藻酸钠和壳聚糖,再通过酰胺化反应接枝酪蛋白磷酸肽,在医用钛合金表面形成具有仿生矿化能力的聚电解质复合薄膜.采用XPS、ATR-FTIR、FESEM以及XRD对样品表面进行表征,并将各组样品放入模拟体液中考察仿生矿化沉积能力.结果表明:在医用钛合金表面成功制备了聚电解质层接枝酪蛋白磷酸肽复合薄膜,经仿生矿化的各组样品表面均有羟基磷灰石沉积,聚电解质层组表面具有纳米多孔结构以及羧基和羟基活性基团,接枝酪蛋白磷酸肽后表面又具有磷酸活性基团,因此最终形成的复合薄膜羟基磷灰石沉积最为致密,表明其生物矿化能力明显增强.
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