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Open AccessArticle

Fabrication and Characterization of Solid Composite Yarns from Carbon Nanotubes and Poly(dicyclopentadiene)

1
Materials Science and Engineering, University of California Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA
2
Chemistry Department, Nuclear Research Center Negev (NRCN), 84190 Beer Sheva, Israel
3
Chemical & Biomolecular Engineering, University of California Los Angeles, 420 Westwood Plaza, Los Angeles, CA 90095, USA
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Combat Capabilities and Development Command, Army Research Laboratory, 6300 Rodman Road, Aberdeen Proving Ground, MD 21005, USA
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Institute for Technology Advancement, University of California Los Angeles, 410 Westwood Plaza, Los Angeles, CA 90095, USA
*
Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(4), 717; https://doi.org/10.3390/nano10040717
Received: 28 February 2020 / Revised: 26 March 2020 / Accepted: 3 April 2020 / Published: 10 April 2020
In this report, networks of carbon nanotubes (CNTs) are transformed into composite yarns by infusion, mechanical consolidation and polymerization of dicyclopentadiene (DCPD). The microstructures of the CNT yarn and its composite are characterized by scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), and a focused ion beam used for cross-sectioning. Pristine yarns have tensile strength, modulus and elongation at failure of 0.8 GPa, 14 GPa and 14.0%, respectively. In the composite yarn, these values are significantly enhanced to 1.2 GPa, 68 GPa and 3.4%, respectively. Owing to the consolidation and alignment improvement, its electrical conductivity was increased from 1.0 × 105 S/m (raw yarn) to 5.0 × 105 S/m and 5.3 × 105 S/m for twisted yarn and composite yarn, respectively. The strengthening mechanism is attributed to the binding of the DCPD polymer, which acts as a capstan and increases frictional forces within the nanotube bundles, making it more difficult to pull them apart. View Full-Text
Keywords: carbon nanotube; composite yarns; dicyclopentadiene; consolidation and alignment; strengthening mechanism carbon nanotube; composite yarns; dicyclopentadiene; consolidation and alignment; strengthening mechanism
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MDPI and ACS Style

Xin, W.; Severino, J.; Venkert, A.; Yu, H.; Knorr, D.; Yang, J.-M.; Carlson, L.; Hicks, R.; De Rosa, I. Fabrication and Characterization of Solid Composite Yarns from Carbon Nanotubes and Poly(dicyclopentadiene). Nanomaterials 2020, 10, 717.

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