(山東理工大學(xué) 機(jī)械工程學(xué)院)
摘 要: 分別將直徑小于2 nm的單壁碳納米管(單壁管含量為50%)，直徑8~10 nm的多壁碳納米管和直徑80~100 nm的多壁碳納米管與銅粉混合，并進(jìn)行機(jī)械球磨，用SEM和TEM對(duì)球磨過(guò)程中碳納米管的形態(tài)演變進(jìn)行研究。結(jié)果表明：直徑80~100nm的碳納米管在受到機(jī)械沖擊時(shí)以發(fā)生斷裂為主，而在形態(tài)上依然保持碳管的基本結(jié)構(gòu)；其斷口有開(kāi)口和封口兩種結(jié)構(gòu)，在開(kāi)口處具有比較復(fù)雜的微觀結(jié)構(gòu)且存在大量的贅生管；直徑小于10 nm的碳納米管在機(jī)械球磨過(guò)程中則易形成球狀的纏結(jié)、納米碳顆粒和巴基蔥；這種差異與不同直徑的碳納米管中不飽和化學(xué)鍵所占的比例有關(guān)。
關(guān)鍵字: 碳納米管；巴基蔥；納米復(fù)合材料；機(jī)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
