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130 MPa和4.47 GPa.
Short carbon fiber (C_((f))) reinforced hydroxyapatite (HA)-poly(methyl methacrylate) (PMMA) matrix bio-composites were prepared by an in-situ processing and solution co-mixing process. The influence of carbon fiber content,initiator dosage and nano-HA mass fraction on the flexural properties of the composites were particularly investigated. The flexural strength and modulus were tested by universal testing machine. The flexural fracture surface morphologies were characterized using SEM. Results reveal that the as-prepared C_((f))/HA-PMMA composites have excellent mechanical properties. With the increase of carbon fiber content, benzoyl peroxide (BPO) dosage and nano-HA mass fraction, the flexural strength and modulus of C_((f))/HA-PMMA composites firstly increase to maximum and then decrease. The flexural strength and flexural modulus will reach the maximum value of 130 MPa and 4.47 GPa when carbon fiber mass content, BPO dosage and HA mass content arrive to 4%, 1.6% and 8%, respectively.
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