激光功率对多壁碳纳米管形貌和连接的影响  

Effects of Laser Power on Nano-welding and Morphology Changes of Multi-walled Carbon Nanotubes

作　　者：袁艳萍[1,2] 尚奕彤[2,3] 陈继民[1,2] YUAN Yanping;SHANG Yitong;CHEN Jimin(Institute of Laser Engineering, Beijing University of Technology, Beijing 100124,China;Beijing Engineering Research Center of 3D Printing for Digital Medical Health, Beijing University of Technology, Beijing 100124,China;College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124,China)

机构地区：[1]北京工业大学激光工程研究院,北京100124 [2]北京工业大学北京市数字化医疗3D打印工程技术研究中心,北京100124 [3]北京工业大学机械工程与应用电子技术学院,北京100124

出　　处：《北京工业大学学报》2016年第10期1446-1450,共5页Journal of Beijing University of Technology

基　　金：北京市科技创新项目(Z141100002814011);中国博士后科学基金面上项目(71101011201501)

摘　　要：为了研究了多壁碳纳米管的连接和表面形貌变化,利用1 064 nm光纤激光辐照多壁碳纳米管对其进行连接,并通过扫描电镜观测其连接现象.通过改变激光功率密度和辐照时间,研究其对碳纳米管的连接效果及其表面形貌改变.结果表明:激光功率密度对多壁碳纳米管的表面形貌和连接质量均有影响;当激光总功率密度约为90W/cm^2时,可观测到碳纳米管的连接;由于热累积效应,当激光总功率密度较高时,激光诱导孔洞结构和纳米粒子在碳纳米管的壁管上大量出现,碳纳米管的长径比也严重下降,这对碳纳米管的应用极其不利.In this study, the nanoscale welding and morphology changes of multi-walled carbon nanotubes (MWCNTs) were focused experimentally. After 1 064 nm fiber laser irradiation, MWCNTs can be welded together, which was observed by scanning electron microscope ( SEM). Effects of laser power density and irradiation time on the welding and morphology changes of MWCNTs were investigated. Experiments show that nanoscale welding is achieved at a total power density of 90 W/ cm2. Due to the thermal accumulation, holes and na-noparticles are induced during higher total power density irradiation and aspects ratios of MWCNTs are strongly reduced.

关 键 词：激光技术 多壁碳纳米管 纳米连接 扫描电镜 

分 类 号：U461[机械工程—车辆工程] TP308[交通运输工程—载运工具运用工程]