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Reports Outline Fullerenes Findings from University of Technology (Charge carrier transport and low electrical percolation threshold in multiwalled...

August 1, 2014



Reports Outline Fullerenes Findings from University of Technology (Charge carrier transport and low electrical percolation threshold in multiwalled carbon nanotube polymer nanocomposites)

By a News Reporter-Staff News Editor at Science Letter -- Current study results on Fullerenes have been published. According to news reporting from Bratislava, Slovakia, by NewsRx journalists, research stated, "Electrical transport properties of multiwalled carbon nanotube (MWCNT) polymer nanocomposites based on epoxy and high density polyethylene (HDPE) as matrices have been studied. The composites have been prepared from masterbatches by dilution."

The news correspondents obtained a quote from the research from the University of Technology, "Low electrical percolation thresholds of 0.05 and 0.4 vol.% of carbon nanotubes in epoxy and HDPE matrices were found respectively. The analysis of the temperature dependence of dc-conductivity shows that the charge transport is fully described as the combination in series of one-dimensional (1-D) and three-dimensional (3-D) variable range hopping (VRH) regimes. The transport is limited by the 1-D VRH regime in the low temperatures limit and by the 3-D VRH regime at room temperature. The analysis of the VRH parameters when the overall volume fraction of MWCNT decreases reveals two distinct situations. In the epoxy the local characteristics of the masterbatch remain practically unchanged and a percolating network is maintained even at very low volume fractions; in the HDPE matrix, the density of the MWCNT bundles packing decreases as revealed by the strong variation of the Mott temperature parameter."

According to the news reporters, the research concluded: "Our results indicate that amorphous polymers matrices give lower percolation thresholds than semicrystalline ones when a masterbatch dilution process is used."

For more information on this research see: Charge carrier transport and low electrical percolation threshold in multiwalled carbon nanotube polymer nanocomposites. Carbon, 2014;76():10-18. Carbon can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; Carbon - www.elsevier.com/wps/product/cws_home/258)

Our news journalists report that additional information may be obtained by contacting M. Jouni, Slovak Univ Technol Bratislava, Fac Chem & Food Technol, Dept. of Chem Phys, SK-81237 Bratislava, Slovakia. Additional authors for this research include J. Faure-Vincent, P. Fedorko, D. Djurado, G. Boiteux and V. Massardier (see also Fullerenes).

Keywords for this news article include: Bratislava, Slovakia, Europe, Carbon Nanotubes, Emerging Technologies, Fullerenes, Multiwalled Carbon Nanotube, Nanocomposite, Nanotechnology

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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