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A Comparison of Mechanical and Electrical Properties in HierarchicalComposites Prepared using Electrophoretic or Chemical Vapor Deposition of CarbonNanotubes

Published online by Cambridge University Press:  06 January 2016

Andrew N. Rider ,
Qi An ,
Narelle Brack  and
Erik T. Thostenson
Andrew N. Rider*
Affiliation:
Defence Science and Technology Group, Fisherman’s Bend, Victoria 3207, Australia
Qi An
Affiliation:
Department of Mechanical Engineering, Department of Materials Science and Engineering, and Center for Composite Materials, University of Delaware, Newark, DE 19716, USA
Narelle Brack
Affiliation:
Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria, 3086, Australia
Erik T. Thostenson
Affiliation:
Department of Mechanical Engineering, Department of Materials Science and Engineering, and Center for Composite Materials, University of Delaware, Newark, DE 19716, USA
*
*(Email: ridera1@outlook.com)
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Abstract

Two approaches have been employed in the preparation of hierarchical compositelaminates with a carbon nanotube (CNT) phase. Glass fibers were coated with CNTsusing electrophoretic deposition (EPD) prior to infusion with epoxy resin. TheCNTs were functionalized using an ultrasonicated-ozone process followed byreaction with polyethyleneimine (PEI) to enhance CNT to fiber and matrixadhesion. Chemical vapor deposition (CVD) was also used to grow CNTs onto quartzfibers, prior to infusion with an epoxy resin modified with a thermoplasticnanophase. The mechanical performance of the two CNT laminates types weresimilar, however, the fracture surfaces indicated distinct differences. The EPDlaminates showed fracture in the CNT-rich interphase region, whereas, the CVDlaminates showed that strength was limited by adhesion failure at the CNT-fiberinterface. The electrical conductivity of CVD laminates was 100 times higherthan EPD laminates. For the EPD laminates the PEI functionalization increasesthe CNT-CNT distance resulting in reduced conductivity, while the high CNTpacking density and residual iron catalyst on the fiber surface in the CVDlaminates creates conducting pathways resulting in higher conductivities.

Keywords

compositenanostructurenanoscale

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Type
Articles
Information
MRS Advances , Volume 1 , Issue 12: Mechanical Behavior and Failure of Materials , 2016 , pp. 785 - 790
Copyright
Copyright © Materials Research Society 2016 

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References

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