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Enhanced electromagnetic interference shielding effectiveness of polyaniline functionalized carbon nanotubes filled polystyrene composites

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Abstract

Multiwall carbon nanotubes (MWCNTs)/polystyrene composites were fabricated by solution processing route using non-covalently functionalized (polyaniline coated) MWCNTs. These composites exhibit an extremely low percolation threshold (0.12 vol.% MWCNT) along with micro porosity and are found to have potential applications in the areas of electromagnetic interference (EMI) shielding and electrostatic dissipation (ESD) with an ESD time of 0.78 s and shielding effectiveness of −23.3 dB (>99 % attenuation). The EMI shielding was found to be dominated by absorption (−18.7 dB) with a nominal contribution from reflection (−4.6 dB) that can explained in terms of multiple internal reflection phenomenon driven by high conductivity and the porous structure.

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Acknowledgments

We wish to thank Director NPL for his keen interest in work. We are also thankful to Mr. K.N. Sood for recording SEM images.

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Authors and Affiliations

  1. Polymeric & Soft Materials Section, CSIR-National Physical Laboratory, New Delhi, 110 012, India

    Parveen Saini

  2. Centre for Polymer Science & Engineering, Indian Institute of Technology, New Delhi, 110 016, India

    Parveen Saini & Veena Choudhary

Authors
  1. Parveen Saini
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  2. Veena Choudhary
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Correspondence to Parveen Saini.

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Saini, P., Choudhary, V. Enhanced electromagnetic interference shielding effectiveness of polyaniline functionalized carbon nanotubes filled polystyrene composites. J Nanopart Res 15, 1415 (2013). https://doi.org/10.1007/s11051-012-1415-2

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  • DOI: https://doi.org/10.1007/s11051-012-1415-2

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