以丙烯腈短切碳纤维(Cf)为增强相,纳米羟基磷灰石(HA)为改性体,聚甲基丙烯酸甲酯(PMMA)为基体,采用原位合成与溶液共混相结合的方法,制备了Cf-HA/PMMA生物复合材料.用X射线衍射仪(XRD)、红外吸收光谱仪(FTIR)、扫描电子显微镜(SEM)和能谱仪(EDS)等对材料的结构组成及断面的微观形貌等进行测试和表征,使用万能材料试验机测试其力学性能.结果表明:该合成工艺可以保证短切碳纤维和HA在基体PMMA中均匀分布;所制备的复合材料具有较好的力学性能.随着碳纤维含量的增加,复合材料的弯曲强度和模量均呈先增大后减小的趋势.当碳纤维含量为4%、HA含量为2%时(质量分数),复合材料的弯曲强度和弯曲模量达到极大值97.41 MPa和3.06 GPa.从复合材料的SEM照片可以看出,当碳纤维含量增加到6 0A时,纤维在基体PMMA中出现部分聚集现象.
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