Property improvement of CNT spun yarns and their composites through pressing, stretching and tensioning
Property improvement of CNT spun yarns and their composites through pressing, stretching and tensioning
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DOI：
10.1080/09243046.2019.1610586
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发表时间：
2019-05
影响因子：
2.9
通讯作者：
T. Nam;K. Goto;Y. Shimamura;Y. Inoue;S. Ogihara
中科院分区：
文献类型：
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作者：
T. Nam;K. Goto;Y. Shimamura;Y. Inoue;S. Ogihara
以垂直排列的碳纳米管阵列为原料，通过陶瓷模具固态拉伸碳纳米管网，纺制出无捻多壁碳纳米管(CNT)丝。采用树脂滴加法制备了碳纳米管纤维增强环氧复合材料。碳纳米管在未加捻纱中的波纹度和堆积不良限制了纱线及其复合材料的力学性能。因此，采用挤压与滑动相结合的方法，形成了碳纳米管紧密堆积的薄捻纱。此外，还对加捻纱采用了拉伸和拉伸技术，以降低碳纳米管及其束的扭转角和波纹度。在0.15、0.25、0.35N的恒定载荷下，压滑纱的拉伸和拉伸显著提高了纱线的力学性能。此外，压滑碳纳米管纱线的拉伸和拉伸显著提高了纱线复合材料的力学性能。然而，压滑纱的拉伸比拉伸更有效。
Untwisted multi-walled carbon nanotube (CNT) yarn was spun from vertically aligned CNT arrays by solid-state drawing CNT webs through a ceramic die. CNT yarn-reinforced epoxy composites were developed using a resin drop method. Waviness and poor packing of CNTs in the untwisted spun yarns have limited the mechanical properties of the yarns and their composites. Therefore, pressing along with sliding was applied to create thin-twisted yarns with dense packing of the CNTs. Besides, stretching and tensioning techniques were applied to the twisted yarns to reduce twist angle as well as waviness of the CNTs and their bundles. Stretching and tensioning of the press-slid yarns under constant loads of 0.15, 0.25, 0.35 N enhanced the mechanical properties of the yarns significantly. Moreover, stretching and tensioning of the press-slid CNT yarns increased the mechanical properties of the yarn composites considerably. However, tensioning of the press-slid yarns is more effective than their stretching.