Journal
JOURNAL OF NANOPARTICLE RESEARCH
Volume 15, Issue 1, Pages -Publisher
SPRINGER
DOI: 10.1007/s11051-012-1415-2
Keywords
Polyaniline; Conducting polymers; Electrical conductivity; Antistatic; EMI shielding effectiveness; Absorption loss and reflection loss
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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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