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以甲基丙烯酸甲酯(MMA)和丙烯酸甲酯(MA)为起始原料,过硫酸钾(KPS)为引发剂,1.5 wt%聚丙烯腈基碳纤维为增强相,采用悬浮聚合的方法,制备了碳纤维增强PMMA-PMA基复合材料(Cf/PMMA-PMA)。研究了疲劳周期对Cf/PMMA-PMA复合材料抗弯强度的影响及其生物活性。采用X射线衍射分析(XRD)对复合材料的结构进行了表征,应用万能材料试验机测试了复合材料的抗弯强度,并利用扫描电子显微镜(SEM)对复合材料的断面显微形貌进行了分析。结果表明,在0~5000次的循环次数内,复合材料的抗弯强度没有显著变化,试样表面的受力处也没有出现裂纹等现象。随复合材料在模拟体液(SBF)中浸泡时间的延长,复合材料表面沉积的羟基磷灰石(HA)颗粒增多,说明复合材料具有良好的生物活性。此外,SBF的浸泡对Cf/PMMA-PMA复合材料的力学性能几乎没有影响。
Using MMA and MA as raw materials, potassium persulfate (KPS) as initiator, and 1.5 wt% polyacrylonitrile-based carbon fiber as reinforcing phase, the method of suspension polymerization was used to prepare Carbon fiber reinforced PMMA-PMA matrix composites (Cf / PMMA-PMA). The fatigue cycle of Cf / PMMA-PMA composites flexural strength and its biological activity. The structure of the composites was characterized by X-ray diffraction (XRD). The flexural strength of the composites was tested by a universal testing machine. The microstructure of the composites was characterized by scanning electron microscopy (SEM) analysis. The results show that the flexural strength of the composites does not change significantly from 0 to 5000 cycles, and no cracks appear on the specimen surface. As the soaking time of the composite in simulated body fluid (SBF) increased, the number of hydroxyapatite (HA) particles deposited on the composite surface increased, indicating that the composite has good biological activity. In addition, the soaking of SBF has almost no effect on the mechanical properties of Cf / PMMA-PMA composites.