碳纳米管在炭纤维表面的可控自组装

Controllable selforganization of carbon nanotubes on the surface of carbon fiber

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。

Using catalytic chemical vapor deposition method,carbon nanotubes（CNTs） was synthetized in situ growth on the surface of carbon fiber（CF） to form various morphologies of CNTs/CF hybrid structures.Then,the morphology and structure characteristics of the nano/micro hybrid structures were analyzed using scanning electronic microscopy and Raman microscopy,which indicated that with the increase of the temperature,CNTs growth on surface of CF transformed from uniform distributions to directional distributions.The length and graphitization of CNTs were also increased in this process.Then,the formation process of nano/micro hybrid structures was illustrated based on a nano cantilever model,which revealed that the morphology variation of nano/micro hybrid structures was caused by the changing of the CNT structure parameters.Hence,the CNT self organization process on the CF surface is controllable by adjusting the CNT structure parameters.