Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 18, 2013
Previous Article Next Article

Effective improvement of the properties of light weight carbon foam by decoration with multi-wall carbon nanotubes

Author affiliations

Abstract

In the present investigation, carbon foam (CF) has been decorated with multi-wall carbon nanotubes (MWCNTs) by two different routes to improve its electromagnetic interference (EMI) shielding effectiveness (SE) and mechanical properties. In the first case, a MWCNTs incorporated carbon precursor was used for the development of CF whereas in the other case, MWCNTs were directly grown over CF by a chemical vapor deposition (CVD) technique. These foams were characterized by scanning electron microscopy, Raman spectroscopy, X-ray diffraction and vector network analyzer for its EMI-SE. It was observed that, EMI-SE was dominated by reflection phenomena and it increased with an increasing MWCNTs content. The MWCNTs incorporated CF demonstrated a maximum EMI-SE value of −72 dB at 1 wt% MWCNTs. In comparison, MWCNTs directly grown on CF gives a maximum EMI-SE of −85 dB at only 0.5 wt% MWCNTs. The higher extent of improvement in EMI-SE in MWCNTs decorated CF was due to the increase in surface area and surface conductivity. The specific shielding effectiveness was 163 dB cm3 g−1 for MWCNTs decorated carbon foam of thickness 2.75 mm. This is the highest value reported in the open literature for CF in the X-band (8.2 to 12.4 GHz) frequency region. Moreover, besides EMI-SE improvement, compressive strength and thermal conductivity were increased by 66 and 75% respectively.

Graphical abstract: Effective improvement of the properties of light weight carbon foam by decoration with multi-wall carbon nanotubes

Back to tab navigation

Article information


Submitted
07 Feb 2013
Accepted
06 Mar 2013
First published
06 Mar 2013

J. Mater. Chem. A, 2013,1, 5727-5735
Article type
Paper

Effective improvement of the properties of light weight carbon foam by decoration with multi-wall carbon nanotubes

R. Kumar, S. R. Dhakate, T. Gupta, P. Saini, B. P. Singh and R. B. Mathur, J. Mater. Chem. A, 2013, 1, 5727
DOI: 10.1039/C3TA10604G

Social activity

Search articles by author

Spotlight

Advertisements