Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 70, Issue 1, Pages 173-180Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2009.10.007
Keywords
Carbon nanotubes; Nano composites; Nano particles; Electrical properties; Mechanical properties
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Funding
- German Research Foundation [DFG GRK 1006/1]
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In this study, three different types of multi-wall carbon nanotubes (MWCNTs) were compared as nanostructured reinforcements in epoxy polymers: commercially available CVD-MWCNTs, synthesised in an industrial process, aligned-CVD-MWCNTs and arc-grown MWCNTs, both obtained from a lab-scale processes. The nanocomposite properties were characterised by means of electron microscopy, rheological, electrical and mechanical methods. Industrial CVD-MWCNTs are favourable for the implication of an electrical conductivity in the epoxy due to their high tendency to form conducting networks. The less entangled structure of aligned-CVD-MWCNTs turns out to be favourable for an easy dispersion and low viscosity in epoxy at similar conductivities compared to the CVD-MWCNTs. Additionally, they provide the highest increase in fracture toughness (similar to 17%). Arc-grown MWCNTs do not offer any electrical conductivity in epoxy without sufficient purification methods. Their high level of impurities and short length further complicate the transfer of their good electrical and mechanical properties into the nanocomposite. (C) 2009 Elsevier Ltd. All rights reserved.
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