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Authors
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Aguilar, J.O.; Bautista, J.R.; Avilés, F.
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Title
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Influence of carbon nanotube clustering on the electrical conductivity of polymer composite films
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Date
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01.05.2010
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Number
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10014
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Abstract
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Electrical conductivity of 150-200 mu m thick polysulfone films loaded with 0.05-0.75% w/w multiwall carbon nanotubes was systematically investigated for two types of dispersion states, uniformly dispersed and agglomerated at the micro-scale. The percolation threshold was found at 0.11% and 0.068% w/w for the uniformly dispersed and agglomerated films, respectively. Overall, the conductivity of the films with agglomerated nanotubes was higher than that of the uniformly dispersed ones, with marked differences of 2 to 4 orders of magnitude for carbon nanotubes loadings in the upper vicinity of the percolation threshold (0.1-0.3% w/w). The increased conductivity of the agglomerated state is explained by the increased nanotube-to-nanotube contact after the percolating network has formed, which facilitates electron transfer.
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Publisher
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eXPRESS Polymer Letters
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Wikidata
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Citation
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eXPRESS Polymer Letters 4 (2010) 292-299
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DOI
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https://doi.org/10.3144/expresspolymlett.2010.37
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Tags
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polymer composites electrical conductivity mwcnt percolation clustering epoxy composites percolation-threshold nanocomposites dispersion transparency networks
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