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Electrical conductivity and Raman imaging of double wall carbon nanotubes in a polymer matrix

Tishkova, Victoria and Raynal, Pierre Ivan and Puech, Pascal and Lonjon, Antoine and Le Fournier, Marion and Demont, Philippe and Flahaut, Emmanuel and Bacsa, Wolfgang Electrical conductivity and Raman imaging of double wall carbon nanotubes in a polymer matrix. (2011) Composites Science and Technology, vol. 71 (n° 10). pp. 1326-1330. ISSN 0266-3538

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Official URL: http://dx.doi.org/10.1016/j.compscitech.2011.05.001

Abstract

Raman spectroscopy is used to access the dispersion state of DWNTs in a PEEK polymer matrix. The interaction of the outer tube with the matrix can be determined from the line shape of the Raman G band. This allows us to distinguish regions where the nanotubes are well dispersed and regions where the nanotubes are agglomerated. The percolation threshold of the electrical conductivity of the double wall carbon nanotubes (DWNTs)/PEEK nanocomposites is found to be at 0.2–0.3 wt.%. We find a maximum electrical conductivity of 3 x 10-2 S/cm at 2 wt.% loading. We detect nanotube weight concentrations as low as 0.16 wt.% by Raman spectroscopy using a yellow excitation wavelength. We compare the Raman images with transmission electron microscopy images and electrical conductivity measurements. A statistical method is used to find a quantitative measure of the DWNTs dispersion in the polymer matrix from the Raman images.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Composites Science and Technology website: http://www.sciencedirect.com/science/article/pii/S0266353811001631
Audience (journal):International peer-reviewed journal
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Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
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Deposited By:Denis Faragou

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