Effects of laser cutting on the structural and mechanical properties of carbon nanotube assemblages
Effects of laser cutting on the structural and mechanical properties of carbon nanotube assemblages
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DOI：
10.1016/j.mseb.2017.06.010
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发表时间：
2017-09-01
影响因子：
3.6
通讯作者：
Shanov, Vesselin
中科院分区：
文献类型：
--
作者：
Gbordzoe, Seyram;Yarmolenko, Sergey;Shanov, Vesselin
碳纳米管(CNT)的多种应用需要将其组装成宏观材料：薄膜、薄片和条带。这些宏观材料大多是柔性的薄壁结构，需要切割到微米尺寸。激光切割已经成为最好的无压力替代方法之一，提供了精度和一致性。我们报道了激光切割对碳纳米管片组件的结构和力学性能的影响。通过拉曼光谱、电子显微镜和电子能量损失谱观察到，激光切割在刀具刃口及其附近形成了大量有害的非晶态碳。这种损伤可能会对碳纳米管的物理性能和基于它们的应用产生不利影响。研究发现，在高功率激光切割下，碳纳米管的抗拉强度降低了75%。然而，在较小的切割宽度下，无论激光功率如何，机械性能都会受到影响。(C)2017爱思唯尔B.V.保留所有权利。
Multiple applications of carbon nanotubes (CNTs) require their assembly into macroscopic materials: films, sheets, and ribbons. Most of these macro-materials are flexible thin structures and need to be cut to micrometer dimensions. Laser cutting has emerged as one of the best pressure-free alternative methods, providing accuracy and uniformity. We report on the effect of laser cutting on the structural and mechanical properties of CNT sheet assemblages. Laser cutting forms a significant and deleterious amount of amorphous carbon at and near the cut edge, and this was observed by Raman spectroscopy, transmission electron microscopy, and electron energy loss spectroscopy. The damage can have adverse effects on the physical properties of CNTs and applications based on them. Laser cutting at high power was found to reduce the tensile strength of CNT sheets by as much as 75%. Nevertheless, at smaller cut widths, the mechanical properties were affected irrespective of the laser power. (C) 2017 Elsevier B.V. All rights reserved.