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Effects of Functionalization on Thermal Properties of Single-Wall and Multi-Wall Carbon Nanotube–Polymer Nanocomposites

Open access
Gulotty, Richard, Castellino, Micaela, Jagdale, Pravin, Tagliaferro, Alberto, Balandin, Alexander A.·2013·ACS Nano

Abstract

Carboxylic functionalization (-COOH groups) of carbon nanotubes is known to improve their dispersion properties and increase the electrical conductivity of carbon-nanotube-polymer nanocomposites. We have studied experimentally the effects of this type of functionalization on the thermal conductivity of the nanocomposites. It was found that while even small quantities of carbon nanotubes (~1 wt %) can increase the electrical conductivity, a larger loading fraction (~3 wt %) is required to enhance the thermal conductivity of nanocomposites. Functionalized multi-wall carbon nanotubes performed the best as filler material leading to a simultaneous improvement of the electrical and thermal properties of the composites. Functionalization of the single-wall carbon nanotubes reduced the thermal conductivity enhancement. The observed trends were explained by the fact that while surface functionalization increases the coupling between carbon nanotube and polymer matrix, it also leads to formation of defects, which impede the acoustic phonon transport in the single-wall carbon nanotubes. The obtained results are important for applications of carbon nanotubes and graphene flakes as fillers for improving thermal, electrical and mechanical properties of composites.

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Metadata

Authors
Gulotty, R., Castellino, M., Jagdale, P., Tagliaferro, A., & Balandin, A. A.
Venue
ACS Nano
Published
2013-05-20
Volume
7
Issue
6
Pages
5114-5121
ISSN
  • 1936-0851 (ISSN-L)
  • 1936-086X
OpenAlex
W2144300255
Cited by
251
References
3
FWCI
8.73
Type
journal article
Language
en
Open access
green

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Gulotty, R., Castellino, M., Jagdale, P., Tagliaferro, A., & Balandin, A. A. (2013). Effects of Functionalization on Thermal Properties of Single-Wall and Multi-Wall Carbon Nanotube–Polymer Nanocomposites. ACS Nano. https://doi.org/10.1021/nn400726g

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