碳纤维增强α-磷酸三钙骨水泥的研究

A Study on α-Tricalcium Phosphate Bone Cement Carbon Fiber-reinforced

为提高α-磷酸三钙(-αTCP)骨水泥的强度及降低其脆性,将表面改性后的碳纤维(CF)与α-TCP粉复合,制备成-αTCP/CF复合增强骨水泥。通过R inger's体液浸泡观察骨水泥快速结晶自固化能力,运用扫描电子显微镜(SEM)及抗压强度测试仪对复合材料浸泡后试样进行断面显微结构分析及抗压强度测试。结果显示,α-TCP骨水泥块浸泡5 d后即转化生成片状羟基磷灰石晶体;适量的碳纤维在骨水泥基体中分布均匀,与基体结合性好,可得到抗压强度增强的骨修复材料;当碳纤维的加入重量百分数为0.5%时,复合材料抗压强度达到46.7 M Pa,比未增强的-αTCP材料提高了22%。

In order to improve the mechanical properties of α-tricalcium phosphate （α-TCP）, we prepared surface-modified carbon fibers （CF） reinforced α-TCP composite bone cement, Bone cement was soaked in Ringer＇s body solution to test its capacity of fast formation of hydroxyapatite crystals and self-solidification. Scan electronic microscope （SEM） observation and compressive strength measurement were taken to analyze the mechanical properties and the micro- morphological structure of CF reinforced α-TCP bone cement. The results showed that the bone cement was transferred into hydroxyapatite plates after being soaked in Ringer＇s simulated body fluid for 5 days. Suitable amount of carbon fibers could well spread in and bond with the matrix of the bone cement. The mechanical properties of the bone cement have been improved by CF reinforcing; the compressive strength reaches 46.7MPa when the amount of carbon fibers is 0.5% in weight percent, which is 22% higher than that of the non-reinforced α-TCP bone cement.