短切碳纤维/羟基磷灰石生物复合材料的制备及性能

Preparation and property of short carbon fiber reinforced hydroxyapatite bio-composite

以短切碳纤维为增强相,采用原位复合法制备短切碳纤维(Cf)/羟基磷灰石(HA)生物复合材料。为提高材料的界面结合,对Cf表面进行氧化处理。对纯HA结构、Cf表面以及复合材料断口形貌分别采用XRD、FTIR、SEM进行分析表征;采用万能试验机对复合材料进行力学性能测试。结果表明:氧化处理后Cf表面变粗糙,有羟基羧基官能团出现;Cf质量分数为3%时Cf/HA复合材料相对密度最大,力学性能最好,弯曲强度和弯曲模量分别约为130 MPa和36 GPa。Cf/HA复合材料断口SEM照片表明,Cf质量分数低于6%时能够实现在HA基体中的均匀分布。

A short carbon fiber（Cf） reinforced hydroxyapatite（HA） bio-composite was prepared by in-situ processing.In order to improve the interfacial bonding of Cf/HA bio-composite,Cf surface was modified by oxidation treatment.The pure HA structures,Cf surfaces and fracture surface morphologies of the bio-composite were analyzed using XRD,FTIR and SEM,respectively.The mechanical properties of the Cf/HA were tested by a universal testing machine.The result shows that after oxidation treatment the surface of Cf exhibits rough and a lot of —OH,—COOH appears.The bio-composite has the maximum relative density and the excellent mechanical properties when Cf mass fraction is 3%,flexural strength and flexural modulus reach the maximum values of 130 MPa and 36 GPa.SEM fracture surface morphologies of Cf/HA bio-composite indicate that when the mass fraction is less than 6%,Cf uniformly disperses in the HA matrix.