Effects of Wet-Pressing and Cross-Linking on the Tensile Properties of Carbon Nanotube Fibers
To increase the strength of carbon nanotube (CNT) fibers (CNTFs), the mean size of voids between bundles of CNTs was reduced by wet-pressing, and the CNTs were cross-linked. Separate and simultaneous physical (roller pressing) and chemical methods (cross-linking) were tested to confirm each method&a...
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doaj-d4c7230f3bc14cb1a1133343c38429ac2020-11-24T22:00:11ZengMDPI AGMaterials1996-19442018-11-011111217010.3390/ma11112170ma11112170Effects of Wet-Pressing and Cross-Linking on the Tensile Properties of Carbon Nanotube FibersHyunjung Cho0Jinwoo Lee1Haemin Lee2Sung-Hyun Lee3Junbeom Park4Cheol-Hun Lee5Kun-Hong Lee6Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 37673, KoreaDepartment of Chemical Engineering, Pohang University of Science and Technology, Pohang 37673, KoreaDepartment of Chemical Engineering, Pohang University of Science and Technology, Pohang 37673, KoreaAdvanced Composite Materials, Korea Institute of Science and Technology, Jeonbuk 55324, KoreaAdvanced Composite Materials, Korea Institute of Science and Technology, Jeonbuk 55324, KoreaDepartment of Chemical Engineering, Pohang University of Science and Technology, Pohang 37673, KoreaDepartment of Chemical Engineering, Pohang University of Science and Technology, Pohang 37673, KoreaTo increase the strength of carbon nanotube (CNT) fibers (CNTFs), the mean size of voids between bundles of CNTs was reduced by wet-pressing, and the CNTs were cross-linked. Separate and simultaneous physical (roller pressing) and chemical methods (cross-linking) were tested to confirm each method’s effects on the CNTF strength. By reducing the fraction of pores, roller pressing decreased the cross-sectional area from 160 μm<sup>2</sup> to 66 μm<sup>2</sup> and increased the average load-at-break from 2.83 ± 0.25 cN to 4.41 ± 0.16 cN. Simultaneous injection of crosslinker and roller pressing augmented the cross-linking effect by increasing the infiltration of the crosslinker solution into the CNTF, so the specific strength increased from 0.40 ± 0.05 N/tex to 0.67 ± 0.04 N/tex. To increase the strength by cross-linking, it was necessary that the size of the pores inside the CNTF were reduced, and the infiltration of the solution was increased. These results suggest that combined physical and chemical treatment is effective to increase the strength of CNTFs.https://www.mdpi.com/1996-1944/11/11/2170densificationcapillary pressurecross-linking reactionspecific strength |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Hyunjung Cho Jinwoo Lee Haemin Lee Sung-Hyun Lee Junbeom Park Cheol-Hun Lee Kun-Hong Lee |
spellingShingle |
Hyunjung Cho Jinwoo Lee Haemin Lee Sung-Hyun Lee Junbeom Park Cheol-Hun Lee Kun-Hong Lee Effects of Wet-Pressing and Cross-Linking on the Tensile Properties of Carbon Nanotube Fibers Materials densification capillary pressure cross-linking reaction specific strength |
author_facet |
Hyunjung Cho Jinwoo Lee Haemin Lee Sung-Hyun Lee Junbeom Park Cheol-Hun Lee Kun-Hong Lee |
author_sort |
Hyunjung Cho |
title |
Effects of Wet-Pressing and Cross-Linking on the Tensile Properties of Carbon Nanotube Fibers |
title_short |
Effects of Wet-Pressing and Cross-Linking on the Tensile Properties of Carbon Nanotube Fibers |
title_full |
Effects of Wet-Pressing and Cross-Linking on the Tensile Properties of Carbon Nanotube Fibers |
title_fullStr |
Effects of Wet-Pressing and Cross-Linking on the Tensile Properties of Carbon Nanotube Fibers |
title_full_unstemmed |
Effects of Wet-Pressing and Cross-Linking on the Tensile Properties of Carbon Nanotube Fibers |
title_sort |
effects of wet-pressing and cross-linking on the tensile properties of carbon nanotube fibers |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2018-11-01 |
description |
To increase the strength of carbon nanotube (CNT) fibers (CNTFs), the mean size of voids between bundles of CNTs was reduced by wet-pressing, and the CNTs were cross-linked. Separate and simultaneous physical (roller pressing) and chemical methods (cross-linking) were tested to confirm each method’s effects on the CNTF strength. By reducing the fraction of pores, roller pressing decreased the cross-sectional area from 160 μm<sup>2</sup> to 66 μm<sup>2</sup> and increased the average load-at-break from 2.83 ± 0.25 cN to 4.41 ± 0.16 cN. Simultaneous injection of crosslinker and roller pressing augmented the cross-linking effect by increasing the infiltration of the crosslinker solution into the CNTF, so the specific strength increased from 0.40 ± 0.05 N/tex to 0.67 ± 0.04 N/tex. To increase the strength by cross-linking, it was necessary that the size of the pores inside the CNTF were reduced, and the infiltration of the solution was increased. These results suggest that combined physical and chemical treatment is effective to increase the strength of CNTFs. |
topic |
densification capillary pressure cross-linking reaction specific strength |
url |
https://www.mdpi.com/1996-1944/11/11/2170 |
work_keys_str_mv |
AT hyunjungcho effectsofwetpressingandcrosslinkingonthetensilepropertiesofcarbonnanotubefibers AT jinwoolee effectsofwetpressingandcrosslinkingonthetensilepropertiesofcarbonnanotubefibers AT haeminlee effectsofwetpressingandcrosslinkingonthetensilepropertiesofcarbonnanotubefibers AT sunghyunlee effectsofwetpressingandcrosslinkingonthetensilepropertiesofcarbonnanotubefibers AT junbeompark effectsofwetpressingandcrosslinkingonthetensilepropertiesofcarbonnanotubefibers AT cheolhunlee effectsofwetpressingandcrosslinkingonthetensilepropertiesofcarbonnanotubefibers AT kunhonglee effectsofwetpressingandcrosslinkingonthetensilepropertiesofcarbonnanotubefibers |
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