Magnetic properties of multi-walled carbon nanotube–epoxy composites

Epoxy matrix composites have been prepared using as filler different weight fractions (0.03–1 wt%) of CVD grown multi-walled carbon nanotubes (MWCNTs) containing trapped iron nanoparticles. Magnetic characterization performed at room temperature with magnetic field between −19 and 19 kG shows that t...

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Bibliographic Details
Published in:Polymer (Guilford) 2005-07, Vol.46 (16), p.6090-6095
Main Authors: Zilli, D., Chiliotte, C., Escobar, M.M., Bekeris, V., Rubiolo, G.R., Cukierman, A.L., Goyanes, S.
Format: Article
Language:English
Subjects:
Applied sciences
Carbon nanotubes
Composites
Epoxy matrix
Exact sciences and technology
Forms of application and semi-finished materials
Magnetic properties
Polymer industry, paints, wood
Technology of polymers
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Summary:Epoxy matrix composites have been prepared using as filler different weight fractions (0.03–1 wt%) of CVD grown multi-walled carbon nanotubes (MWCNTs) containing trapped iron nanoparticles. Magnetic characterization performed at room temperature with magnetic field between −19 and 19 kG shows that the nanocomposites are weakly ferromagnetic at room temperature. An abrupt variation in the dependence of both the coercivity field, B C, and remanent magnetization, M R, with the weight fraction of MWCNTs, ϕ, was found for ϕ=0.4%. Results suggest the formation of MWCNTs agglomerates for increasing weight concentrations, in accordance with SEM micrographs.
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2005.04.086