为提高壳聚糖支架材料的孔隙率及矿化程度,通过磷酸化表面改性和仿生矿化制备了磷酸化(PCSW)和生物矿化(BMCW)木垛型壳聚糖多孔支架.FTIR结果显示,壳聚糖分子中有磷酸根的引入.XRD结果表明,矿化24 h后支架上形成结晶度较高的磷酸钙盐晶体,矿化48 h后结晶度明显增加并形成单纯的羟基磷灰石(HA)结晶.SEM观察发现,在支架的内外表面均致密地沉积了HA晶体层.压缩强度测试结果表明,复合支架BMCW矿化48 h的压缩强度为(0.54±0.005) MPa,压缩模量为(5.47±0.65) MPa,BMCW可用作非承重骨组织修复材料.
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