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采用原位合成与溶液共混相结合的方法,制备了短切碳纤维(C(f))增强纳米羟基磷灰石(HA)-聚甲基丙烯酸甲酯(PMMA)生物复合材料。分别研究了丙烯腈基短切碳纤维含量、引发剂(过氧化苯甲酰,BPO)用量和HA的质量分数对复合材料弯曲强度和弯曲模量的影响。采用万能材料试验机和扫描电子显微镜对复合材料的弯曲性能及断面的微观形貌进行了测试和表征。结果表明,在一定质量分数范围内,分别增加碳纤维含量、BPO用量或HA的含量,复合材料的弯曲强度和模量均呈现先增大后减小的趋势。当C(f)含量为4%、BPO用量为1.6%和HA质量分数为8%时,复合材料的抗弯曲强度和模量达到最大值,分别为130MPa和4.47GPa。
Short-cut carbon fibers (C (f)) reinforced nano-hydroxyapatite (HA) -polymethyl methacrylate (PMMA) bio-composites were prepared by a combination of in situ synthesis and solution blending. The effects of acrylonitrile-based chopped carbon fiber content, initiator (benzoyl peroxide, BPO) content and mass fraction of HA on the flexural strength and flexural modulus of the composites were investigated. The flexural properties and microstructure of the composites were tested and characterized by universal testing machine and scanning electron microscope. The results show that the flexural strength and modulus of the composites increase at first and then decrease with the increase of carbon fiber content, BPO content or HA content respectively within a certain mass fraction. When the content of C (f) is 4%, the amount of BPO is 1.6% and the mass fraction of HA is 8%, the flexural strength and modulus of the composites reach the maximum, which are 130MPa and 4.47GPa respectively.