A Potential High-Throughput Route to Collagen-Mimicked Carbon Nanotube Fiber via Domino Pushing and Ion Bombardment
A Potential High-Throughput Route to Collagen-Mimicked Carbon Nanotube Fiber via Domino Pushing and Ion Bombardment
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通过多米诺骨牌推动和离子轰击获得仿胶原碳纳米管纤维的潜在高通量途径
DOI：
10.1115/1.4046582
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发表时间：
2020-06
影响因子：
2.6
通讯作者：
Zhang Zuoqi
中科院分区：
文献类型：
--
作者：
Yin Qifang;Geng Kun;Yuan Yanan;Zhang Zuoqi
几十年来，碳纳米管（CNT）已被证明具有非凡的机械性能，但迄今为止，其作为承重结构材料的广泛应用尚未实现，主要是由于界面弱、分布和排列不良以及缺乏大规模生产和加工的经济技术等关键障碍。为了克服这些障碍，我们提出了一条从生长的碳纳米管森林到具有交错排列的共价交联碳纳米管的仿胶原碳纳米管薄膜的潜在路线。为了巩固该路线的基础，利用分子动力学模拟模拟了离子轰击在碳纳米管薄膜中构建管间交联的关键步骤。结果表明，离子轰击可以有效构建管间交联，并且与未轰击的相比，CNT薄膜的弹性模量和强度分别提高了24%和660%。系统地研究了入射粒子数量和动能的影响，并给出了相应的等值线，提出了入射粒子的最佳能量和数量对仿胶原碳纳米管薄膜弹性模量和强度的影响。这项工作不仅为高性能碳纳米管纤维的大规模制造提供了一条新途径，而且还为优化工艺设计提供了有用的指导。
Carbon nanotubes (CNTs) have been shown owning extraordinary mechanical properties for decades, but to date, their wide application as load-bearing structural materials has not been realized mainly due to the critical obstacles of weak interface, poor distribution and alignment, and lack of economic technology for mass production and processing. In order to overcome these obstacles, we proposed a potential route from as-grown CNT forest to collagen-mimicked CNT films with covalently crosslinked CNTs arranged in a staggered alignment. To consolidate the foundation of the route, its critical step of ion bombardment to construct the intertube crosslinks in CNT films was simulated using molecular dynamics simulations. Results show that the ion bombardment can efficiently construct the intertube crosslinks and greatly improve the elastic modulus and strength of CNT films by as much as 24% and 660%, respectively, with comparison to the nonbombarded ones. The influences of the number and the kinetic energy of the incident particles were systematically investigated and the corresponding contours were presented, suggesting the optimal energy and number of the incident particles for the elastic modulus and strength of collagen-mimicked CNT films. The work not only provides a novel route to mass fabrication of high-performance CNT fibers but also gives useful guidelines on the optimization of processing design.
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影响因子：
8.6
作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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通讯作者：
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