School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology (QUT), Brisbane, Queensland 4001, Australia.
School of Computing, Engineering and Mathematics, Western Sydney University, Locked Bag 1797, Penrith, New South Wales 2751, Australia.
Nat Commun. 2017 Mar 17;8:14863. doi: 10.1038/ncomms14863.
Carbon fibres have attracted interest from both the scientific and engineering communities due to their outstanding physical properties. Here we report that recently synthesized ultrathin diamond nanothread not only possesses excellent torsional deformation capability, but also excellent interfacial load-transfer efficiency. Compared with (10,10) carbon nanotube bundles, the flattening of nanotubes is not observed in diamond nanothread bundles, which leads to a high-torsional elastic limit that is almost three times higher. Pull-out tests reveal that the diamond nanothread bundle has an interface transfer load of more than twice that of the carbon nanotube bundle, corresponding to an order of magnitude higher in terms of the interfacial shear strength. Such high load-transfer efficiency is attributed to the strong mechanical interlocking effect at the interface. These intriguing features suggest that diamond nanothread could be an excellent candidate for constructing next-generation carbon fibres.
碳纤维因其出色的物理性能而引起了科学界和工程界的关注。在这里，我们报告说，最近合成的超薄金刚石纳米线不仅具有优异的扭转变形能力，而且具有优异的界面载荷传递效率。与（10,10）碳纳米管束相比，在金刚石纳米线管束中没有观察到纳米管的扁平化，这导致了高扭转弹性极限，几乎高出三倍。拔出测试表明，金刚石纳米线束的界面传递载荷超过碳纳米管束的两倍，对应的界面剪切强度高出一个数量级。如此高的载荷传递效率归因于界面处的强机械互锁效应。这些有趣的特性表明，金刚石纳米线可能是构建下一代碳纤维的优秀候选材料。
