【摘要】 以羟基磷灰石(HAP)、聚甲基丙烯酸甲酯(PMMA)和甲基丙烯酸甲酯(MMA)为原料,通过热聚合制备HAP/PMMA生物复合材料,研究了组成和制备工艺对材料形貌、结构和力学性能的影响。结果表明,MMA对PMMA的浸溶会导致复合物样品中产生大的孔洞,力学性能变差。随着HAP含量的增加,复合物的孔隙逐渐减小且趋向均匀,弯曲强度下降。将初始原料混合后直接进行固化得到的复合物样品孔洞小、强度高、柔性大,HAP的含量为30%、40%、50%(质量分数)时,弯曲强度分别为1.5、1.4、0.7 MPa。更多还原

【Abstract】 HAP/PMMA biocomposites were prepared through a thermal polymerization method taking hydroxylapatite(HAP), polymethylmethactylaate(PMMA) and methyl methacrylate(MMA) as raw materials. Effects of preparation processes and concentrations of HAP on the composites’ morphologies, structure and mechanical properties were investigated. Results indicate that infiltration of PMMA with MMA would lead to the formation of big pores and weaken mechanical properties. When the proportion of nano-hydroxyapatite increases, the composite’s pore size decreases and tends to become more uniform, but with a declined flexural strength. The molding process, directly for curing after mixing the initial raw materials, would obtain the composite with small pore size, high strength and flexibility. When the dose of nano-hydroxyapatite is 30 wt%, 40 wt% and 50 wt%, the flexural strength is 1.5, 1.4 and 0.7 MPa, respectively.更多还原