C_((f))/CS-HA复合材料的制备及性能研究

Preparation and Properties of C(f)/CS-HA Composites

以壳聚糖-羟基磷灰石(CS-HA)为基体,碳纤维(C(f))为增强相,采用原位杂化、共混的方法,制备了短碳纤维增强CS-HA生物复合材料。研究了制备方法、单体配比、碳纤维含量对复合材料性能的影响。采用红外吸收光谱、扫描电子显微镜、X-射线衍射和万能材料试验机对材料的结构和性能进行了表征。结果表明:原位杂化法较共混法制备的复合材料力学性能好;当w(CS)/w(HA)=10/1时,复合材料抗折强度达到极大值;随着碳纤维含量增加,复合材料的断裂面由平整向多层断裂变化,材料的韧性有所提高。

Polyacrylonitrile-based carbon fiber reinforced Chitosan-hydroxyapatite （CS-HA） composites （C（f）/CS-HA） were prepared by in situ precipitation and blending process. The infulences of the monomer ratio, processing method and fiber mass fraction on the structure and flexural strength of the composites were particularly investigated. The structures and properties of the as-prepared composites were characterized by IR, XRD, SEM and universal test machine. Results show that the mechanical properties of the composites prepared by in-situ hybridization are better than that prepared by blending method; the flexural strength of the composites reaches the optimum value when the monomer ratio（CS/HA） reaches 10/1. With the increase of carbon fiber mass fraction, the microstructure of the fractured surfaces changes from smooth to crapy, which infers that the toughness of the composites is improved.