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Received January 28, 2015
Accepted June 29, 2015
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Improving the tensile strength of carbon nanotube yarn via one-step double [2+1] cycloadditions
HeeJin Kim
Jaegeun Lee1
Byungrak Park2
Jeong-Hoon Sa1
Alum Jung1
Teawon Kim1
Junbeom Park1
Woonbong Hwang2
Kun-Hong Lee1†
Research Institute of Advanced Energy Technology, Kyungpook National University, 80, Daehak-ro, Buk-gu, Daegu 702-701, Korea 1Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), 77, Cheongam-ro, Nam-gu, Pohang, Gyungbuk 790-784, Korea 2Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 77, Cheongam-ro, Nam-gu, Pohang, Gyungbuk 790-784, Korea
ce20047@postech.ac.kr
Korean Journal of Chemical Engineering, January 2016, 33(1), 299-304(6), 10.1007/s11814-015-0140-9
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Abstract
The tensile strength of a CNT yarn was improved through simple one-step double [2+1] cycloaddition reactions that crosslinked the constituent CNTs using a polyethylene glycol (PEG)-diazide crosslinker. The FT-IR spectrum confirmed that the azide groups in the PEG-diazide were converted into aziridine rings, indicating that the cycloaddition reaction was successful. The generation of crosslinked CNTs was also supported by the observation of N1s peak in the XPS spectrum and the increased thermal stability of the material, as observed by TGA. The tensile strength of the CNT yarn was increased from 0.2GPa to 1.4GPa after the crosslinking reaction when twisted at 4000 twists/meter. The appropriate selection of the crosslinker may further optimize the CNT yarn crosslinking reaction. The simplicity of this one-step crosslinking reaction provides an economical approach to the mass production of high-strength CNT yarns.
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