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The influence of the dispersion method on the electrical properties of vapor-grown carbon nanofiber/epoxy composites.

Cardoso P, Silva J, Klosterman D, Covas JA, van Hattum FW, Simoes R, Lanceros-Mendez S - Nanoscale Res Lett (2011)

Bottom Line: The influence of the dispersion of vapor-grown carbon nanofibers (VGCNF) on the electrical properties of VGCNF/Epoxy composites has been studied.A homogenous dispersion of the VGCNF does not imply better electrical properties.In fact, it is demonstrated that the most simple of the tested dispersion methods results in higher conductivity, since the presence of well-distributed nanofiber clusters appears to be a key factor for increasing composite conductivity.PACS: 72.80.Tm; 73.63.Fg; 81.05.Qk.

View Article: PubMed Central - HTML - PubMed

Affiliation: IPC/I3N--Institute for Polymers and Composites, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal. rsimoes@dep.uminho.pt.

ABSTRACT
The influence of the dispersion of vapor-grown carbon nanofibers (VGCNF) on the electrical properties of VGCNF/Epoxy composites has been studied. A homogenous dispersion of the VGCNF does not imply better electrical properties. In fact, it is demonstrated that the most simple of the tested dispersion methods results in higher conductivity, since the presence of well-distributed nanofiber clusters appears to be a key factor for increasing composite conductivity.PACS: 72.80.Tm; 73.63.Fg; 81.05.Qk.

No MeSH data available.


Left-conductivity versus frequency for the four methods. Right-dielectric constant versus frequency for the four tested methods. Results are for the 0.006 volume fraction sample.
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Figure 3: Left-conductivity versus frequency for the four methods. Right-dielectric constant versus frequency for the four tested methods. Results are for the 0.006 volume fraction sample.

Mentions: Figure 3 (left) shows the measured AC conductivity of the four composites for a range of frequencies. The conductivity of composites prepared by Methods 1 and 2 is more strongly dependent on frequency. Figure 3 (right) presents the dielectric constant versus frequency for the methods under investigation, for a volume fraction of 0.006. Again, the dielectric constant shows a larger frequency dependency for composites 1 and 2.


The influence of the dispersion method on the electrical properties of vapor-grown carbon nanofiber/epoxy composites.

Cardoso P, Silva J, Klosterman D, Covas JA, van Hattum FW, Simoes R, Lanceros-Mendez S - Nanoscale Res Lett (2011)

Left-conductivity versus frequency for the four methods. Right-dielectric constant versus frequency for the four tested methods. Results are for the 0.006 volume fraction sample.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211461&req=5

Figure 3: Left-conductivity versus frequency for the four methods. Right-dielectric constant versus frequency for the four tested methods. Results are for the 0.006 volume fraction sample.
Mentions: Figure 3 (left) shows the measured AC conductivity of the four composites for a range of frequencies. The conductivity of composites prepared by Methods 1 and 2 is more strongly dependent on frequency. Figure 3 (right) presents the dielectric constant versus frequency for the methods under investigation, for a volume fraction of 0.006. Again, the dielectric constant shows a larger frequency dependency for composites 1 and 2.

Bottom Line: The influence of the dispersion of vapor-grown carbon nanofibers (VGCNF) on the electrical properties of VGCNF/Epoxy composites has been studied.A homogenous dispersion of the VGCNF does not imply better electrical properties.In fact, it is demonstrated that the most simple of the tested dispersion methods results in higher conductivity, since the presence of well-distributed nanofiber clusters appears to be a key factor for increasing composite conductivity.PACS: 72.80.Tm; 73.63.Fg; 81.05.Qk.

View Article: PubMed Central - HTML - PubMed

Affiliation: IPC/I3N--Institute for Polymers and Composites, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal. rsimoes@dep.uminho.pt.

ABSTRACT
The influence of the dispersion of vapor-grown carbon nanofibers (VGCNF) on the electrical properties of VGCNF/Epoxy composites has been studied. A homogenous dispersion of the VGCNF does not imply better electrical properties. In fact, it is demonstrated that the most simple of the tested dispersion methods results in higher conductivity, since the presence of well-distributed nanofiber clusters appears to be a key factor for increasing composite conductivity.PACS: 72.80.Tm; 73.63.Fg; 81.05.Qk.

No MeSH data available.