在油包水的乳液体系中,通过原位合成的方法使羟基磷灰石(HAP)在明胶链上化学沉积,改变明胶溶液的浓度,制得了一系列的明胶/HAP复合物微球.采用X射线衍射仪(XRD)、傅里叶变换红外光谱仪(FTIR)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和热失重分析仪(TGA)等对产物的组成、形貌以及热失重情况进行了表征.结果表明,明胶用量对复合物微球中HAP的形成具有重要影响.在明胶溶液浓度为0.025 g/mL时,明胶分子链提供的结合位点恰好与溶液中游离的Ca2+、PO43-等离子达到平衡状态,复合物微球中无机相含量达40%,这是明胶与HAP以化学键合的形式结合所能得到的最大值.
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