Enhancing the strength, toughness, and electrical conductivity of twist-spun carbon nanotube yarns by π bridging
Enhancing the strength, toughness, and electrical conductivity of twist-spun carbon nanotube yarns by π bridging
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DOI：
10.1016/j.carbon.2019.05.023
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发表时间：
2019-09-01
期刊：
影响因子：
10.9
通讯作者：
Cheng, Qunfeng
中科院分区：
文献类型：
--
作者：
Liang, Xiumin;Gao, Yuan;Cheng, Qunfeng
碳纳米管（CNT）之间的弱界面相互作用总是导致CNT纱线中的应力负载传递效率低，本文中我们使用具有芳香端基的分子在室温下制造了坚固的、高导电性的CNT纱线，其中π桥接相邻的CNT。所得CNT纱线具有1697+/-24MPa的高拉伸强度、18.6+/-1.6MJ/m(3)的韧性和656.2S/cm的电导率，分别是纯CNT纱线的3.9、2.5和3.5倍。所得碳纳米管纱线的比拉伸强度高于先前报道的在室温下制造的碳纳米管纱线的比拉伸强度，甚至高于一些使用腐蚀环境或极端温度制造的碳纳米管纱线的比拉伸强度。这种 pi 桥接策略为在环境条件下制造高性能 CNT 纱线提供了一条有前途的途径。 (C) 2019 Elsevier Ltd. 保留所有权利。
The weak interfacial interactions between carbon nanotube (CNT) always results in low stress load transfer efficiency in CNT yarns, herein we fabricated strong, highly conducting CNT yarns at room temperature using molecules having aromatic end groups, pi bridging neighboring CNTs. The resulting CNT yarns have high tensile strength with 1697 +/- 24 MPa, toughness with 18.6 +/- 1.6 MJ/m(3), and electrical conductivity with 656.2 S/cm, which are 3.9, 2.5, and 3.5 times, respectively, as high as that of the neat CNT yarn. The specific tensile strength of the resulting CNT yarn is higher than that for previously reported CNT yarns fabricated at room temperature, even that for some CNT yarns fabricated using corossive environments or extreme temperature. This pi bridging strategy provides a promising avenue for fabricating high performance CNT yarns under ambient conditions. (C) 2019 Elsevier Ltd. All rights reserved.