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采用催化化学气相沉积法将碳纳米管(CNTs)原位生长于炭纤维(CF)表面并自组装成不同形貌的CNTs/CF杂化结构。使用扫描电子显微镜、拉曼光谱仪对制备的纳米/微米杂化结构进行微观形貌分析和结构表征。结果显示,随着温度的升高,碳纳米管在炭纤维表面由均匀分布状态转变为取向生长状态,并且长度及石墨化程度均不断增加。结合碳纳米管结构参数的变化,使用纳米悬臂梁模型解释了这一杂化结构的形成机理。模型分析表明,杂化结构的形貌转变是由不同温度下在炭纤维表面生长的碳纳米管的结构参数不同所造成的,因此可以通过调整相关结构参数控制碳纳米管在炭纤维表面的自组装过程。
Carbon nanotubes (CNTs) were grown in situ on carbon fiber (CF) surface by catalytic chemical vapor deposition and self-assembled into CNTs / CF hybrid structures with different morphologies. The prepared nano / micro hybrid structure was characterized by scanning electron microscopy and Raman spectroscopy. The results show that as the temperature increases, carbon nanotubes transform from uniform distribution to oriented growth on the surface of carbon fibers, and the length and degree of graphitization increase. Combined with the change of the structure parameters of carbon nanotubes, the formation mechanism of this hybrid structure was explained by the nano-cantilever model. The model analysis shows that the morphological changes of the hybrid structure are caused by the different structural parameters of the carbon nanotubes grown on the surface of the carbon fibers at different temperatures. Therefore, the carbon nanotubes can be controlled by adjusting the relevant structural parameters Assembly process.