(山东理工大学 机械工程学院)
摘 要: 分别将直径小于2 nm的单壁碳纳米管(单壁管含量为50%)，直径8~10 nm的多壁碳纳米管和直径80~100 nm的多壁碳纳米管与铜粉混合，并进行机械球磨，用SEM和TEM对球磨过程中碳纳米管的形态演变进行研究。结果表明：直径80~100nm的碳纳米管在受到机械冲击时以发生断裂为主，而在形态上依然保持碳管的基本结构；其断口有开口和封口两种结构，在开口处具有比较复杂的微观结构且存在大量的赘生管；直径小于10 nm的碳纳米管在机械球磨过程中则易形成球状的缠结、纳米碳颗粒和巴基葱；这种差异与不同直径的碳纳米管中不饱和化学键所占的比例有关。
关键字: 碳纳米管；巴基葱；纳米复合材料；机械球磨
（School of Mechanical Engineering, Shandong University of Technology, Zibo 255049, China）
Abstract:Carbon nanotubes with diameters of ＜2 nm, 8−10 nm and 80−100 nm were mixed with copper powder and treated by mechanical ball milling process for different milling times. The morphology transformation of carbon nanotubes during ball milling process was observed by SEM and TEM, respectively. The results show that the carbon nanotubes with diameter of 80−100 nm are fractured and the characteristic structure of nanotube is kept under the mechanical ball milling process. The broken nanotubes were obtained and a lots of neoplasitc tubes are formed. Whereas for the nanotubes with diameters of 2 nm and 10 nm, the twists of carbon nanotubes, carbon nano-particles and carbon onions are formed during the ball milling process. The diversity of the nanotubes with deferent diameters is resulted from the difference of the relative ratio of the unsaturated chemical bond.
Key words: carbon nanotube; carbon onion; nanocomposite; mechanical ball milling
