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Title: Effect of solvent/polymer infiltration and irradiation on microstructure and tensile properties of carbon nanotube yarns

Abstract

Recently carbon nanotube (CNT) yarns have been gaining importance as an approach to harvest the excellent properties of the CNTs. However, the properties of CNT yarns at this stage are well below the expected value. Investigation of the structure of CNT yarns and possible approaches to enhance the strength and modulus are reported. Scanning electron microscopy and focused ion beam imaging reveal the inherently porous structure and poor orientation, emphasizing the need to enhance packing of CNT bundles in the yarns for increased strength and modulus. Densification of CNT yarn by toluene or polystyrene increases the strength by 140 or 172 % and modulus by 79 or 218 %, respectively, as compared to that of the pristine yarn. E-beam irradiation was investigated as a means to introduce crosslinking and enhanced internanotubes bonding to increase strength and modulus. However, the irradiation resulted in generation of defects and damages to the yarn contributing to reduction in strength and modulus. Raman spectroscopy studies on the irradiated samples reveal the change in bonding characteristics resulting in poor mechanical properties. As a result, denser packing of nanotubes and increased interaction without any damage is the key to improve the properties of CNT yarns.

Authors:
 [1];  [1];  [1];  [2];  [3];  [1]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1319215
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Materials Science
Additional Journal Information:
Journal Volume: 51; Journal Issue: 22; Journal ID: ISSN 0022-2461
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Hiremath, Nitilaksha, Lu, Xinyi, Evora, Maria Cecilia, Naskar, Amit, Mays, Jimmy, and Bhat, Gajanan. Effect of solvent/polymer infiltration and irradiation on microstructure and tensile properties of carbon nanotube yarns. United States: N. p., 2016. Web. doi:10.1007/s10853-016-0249-1.
Hiremath, Nitilaksha, Lu, Xinyi, Evora, Maria Cecilia, Naskar, Amit, Mays, Jimmy, & Bhat, Gajanan. Effect of solvent/polymer infiltration and irradiation on microstructure and tensile properties of carbon nanotube yarns. United States. https://doi.org/10.1007/s10853-016-0249-1
Hiremath, Nitilaksha, Lu, Xinyi, Evora, Maria Cecilia, Naskar, Amit, Mays, Jimmy, and Bhat, Gajanan. Fri . "Effect of solvent/polymer infiltration and irradiation on microstructure and tensile properties of carbon nanotube yarns". United States. https://doi.org/10.1007/s10853-016-0249-1. https://www.osti.gov/servlets/purl/1319215.
@article{osti_1319215,
title = {Effect of solvent/polymer infiltration and irradiation on microstructure and tensile properties of carbon nanotube yarns},
author = {Hiremath, Nitilaksha and Lu, Xinyi and Evora, Maria Cecilia and Naskar, Amit and Mays, Jimmy and Bhat, Gajanan},
abstractNote = {Recently carbon nanotube (CNT) yarns have been gaining importance as an approach to harvest the excellent properties of the CNTs. However, the properties of CNT yarns at this stage are well below the expected value. Investigation of the structure of CNT yarns and possible approaches to enhance the strength and modulus are reported. Scanning electron microscopy and focused ion beam imaging reveal the inherently porous structure and poor orientation, emphasizing the need to enhance packing of CNT bundles in the yarns for increased strength and modulus. Densification of CNT yarn by toluene or polystyrene increases the strength by 140 or 172 % and modulus by 79 or 218 %, respectively, as compared to that of the pristine yarn. E-beam irradiation was investigated as a means to introduce crosslinking and enhanced internanotubes bonding to increase strength and modulus. However, the irradiation resulted in generation of defects and damages to the yarn contributing to reduction in strength and modulus. Raman spectroscopy studies on the irradiated samples reveal the change in bonding characteristics resulting in poor mechanical properties. As a result, denser packing of nanotubes and increased interaction without any damage is the key to improve the properties of CNT yarns.},
doi = {10.1007/s10853-016-0249-1},
journal = {Journal of Materials Science},
number = 22,
volume = 51,
place = {United States},
year = {Fri Jul 29 00:00:00 EDT 2016},
month = {Fri Jul 29 00:00:00 EDT 2016}
}

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Cited by: 8 works
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Figures / Tables:

Figure 1 Figure 1: a Schematic of CNT yams spun directly from the CVD reactor (inspired by [15]). b Process of CNT yam spinning from CNTs grown on a substrate (inspire by [16]).

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Works referencing / citing this record:

Effect of Electron Beam and Gamma Rays on Carbon Nanotube Yarn Structure
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