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Improved Electromagnetic Interference Shielding Properties of MWCNT-PMMA Composites Using Layered Structures

Pande, Shailaja and Singh, B. P. and Mathur, R. B. and Dhami, T. L. and Saini, P. and Dhawan, S. K. (2009) Improved Electromagnetic Interference Shielding Properties of MWCNT-PMMA Composites Using Layered Structures. Nanoscale Research Letters, 4 (4). pp. 327-334. ISSN 1931-7573 (Print) 1556-276X (Online)

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Official URL: http://www.springerlink.com/content/q18442785552n1...

Abstract

Electromagnetic interference (EMI) shielding effectiveness (SE) of multi-walled carbon nanotubes–polymethyl methacrylate (MWCNT–PMMA) composites prepared by two different techniques was measured. EMI SE up to 40 dB in the frequency range 8.2–12.4 GHz (X-band) was achieved by stacking seven layers of 0.3-mm thick MWCNT–PMMA composite films compared with 30 dB achieved by stacking two layers of 1.1-mm thick MWCNT–PMMA bulk composite. The characteristic EMI SE graphs of the composites and the mechanism of shielding have been discussed. SE in this frequency range is found to be dominated by absorption. The mechanical properties (tensile, flexural strength and modulus) of the composites were found to be comparable or better than the pure polymer. The studies therefore show that the composite can be used as structurally strong EMI shielding material.

Item Type:Article
Uncontrolled Keywords:Carbon nanotubes - Dispersion - Composites - Electrical conductivity - EMI shielding effectiveness
Subjects:Physical Science > Nanophysics
Physical Science > Nanoelectronics
Physical Science > Nanomagnetics
ID Code:4147
Deposited By:Lesley Tobin
Deposited On:16 Sep 2009 10:02
Last Modified:16 Sep 2009 10:02

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