【作者】 白云祥； 叶璇； 谢欢欢； 朱振兴； 李喜德； 魏飞；

【Author】 Yunxiang Bai;Xuan Ye;Huanhuan Xie;Zhenxing Zhu;Xide Li;Fei Wei;Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology,Tsinghua University;Center for Nano and Micro Mechanics,Tsinghua University;

【机构】 清华大学化工系绿色反应工程与工艺北京市重点实验室； 清华大学航天航空学院微纳米力学与多学科交叉创新研究中心；

【摘要】 水平超长碳纳米管具有完美的原子结构、宏观的长度、高度的取向性等优点,容易体现出碳纳米管本征的优异性能,是制备超强纤维、防弹衣、太空天梯、高性能电子器件等尖端设备的最佳候选材料^[1]。但是对于结构完美的单根超长碳纳米管的优异力学性质在成束之后会如何变化,是超长碳纳米管从微观力学走向宏观力学应用方面亟待解决的问题。本工作通过利用原位气流导向的方法制备出了直径达数十纳米的水平超长碳纳米管束,系统探究了影响其成束效果的各个因素。利用带狭槽的硅片为基底制备出了长度达毫米级的悬空水平超长碳纳米管束。在自组装无机纳米颗粒的基础上^[2],发展了一种在大气条件下使用力学传感器直接测试碳纳米管力学性能的方法,并对水平超长碳纳米管束的力学性能进行了测试及分析。更多还原

【Abstract】 Ultralong carbon nanotubes(CNTs) have excellent properties as they have perfect structures, macroscopic length and controllable orientation, so they can be the best candidate for the applications in super strong fibers, body armor, space elevator and high-performance electronic devices. For the promotion of the transformation from micromechanics to macroscopic mechanical application of ultralong CNTs, it’s significant for us to know whether the ultralong CNT bundles with perfect structures still have the same excellent mechanical properties as the single ultralong CNT has or not. Herein, we prepared the ultralong CNT bundles with diameter of tens of nanometer by the controllable gas flow and explored the factors that influence the preparation of the bundles. And the CNT bundles with length up to millimeters growing across a slot were prepared. With the assistance of inorganic nanoparticles, we realized the direct measurement and study of the mechanical properties of the ultralong CNT bundles.更多还原