炭纤维网布/螺旋碳纤维复合材料制备及电磁性能研究

以炭纤维网布为基体,通过电镀工艺在炭纤维网布上形成Ni催化剂膜,采用化学气相沉积方法原位合成炭纤维网布/螺旋纳米碳纤维复合材料,采用扫描电镜(SEM)、Raman光谱和X射线衍射仪(XRD)对生长的螺旋纳米碳纤维的形态和结构进行表征。考察主要反应因素—温度对螺旋纳米碳纤维生长的影响,并就生长过程进行了讨论;对其制备出的炭纤维网布/螺旋纳米碳纤维复合材料在8.2～12.4GHz频段的电磁性能进行分析,考察其吸波性能。结果表明制备出的炭纤维网布/螺旋纳米碳纤维复合材料比单一的螺旋纳米碳纤维具有更高的电磁损耗角正切,电损耗正切值由0.7提高到3.8,表明复合材料具有较好的吸波性能。

Preparation and electromagnetic properties of carbon fiber web/micro-coiled carbon nanofiber composite

The carbon fiber web/microcoiled carbon nanofibers composite was in-situ prepared by CVD method with carbon fiber web as substrate,on which Ni film was electroplated as catalyst.The morphology and structure of as-grown microcoiled carbon nanofibers was characterized by SEM,Raman spectrum and XRD in detail.The effect of main process parameter,reaction temperature,on the growth of the microcoiled carbon nanofibers was studied by experiments.Furthermore,the electromagnetic performance of the carbon fiber web/microcoiled carbon nanofibers composite was measured to demonstrate their wave absorbing ability by wave-guide in the frequency range of 8.2-12.4GHz.The results demonstrated that the carbon fiber web/microcoiled carbon nanofibers composite with idea morphology and structure have higher tanδε value 3.8 than 0.7 of microcoiled carbon nanofibers,in other words,carbon nanofibers/ carbon fiber web composite have high microwave absorbing ability.