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

被引：0
作者：
Parveen Saini
Veena Choudhary
机构：
[1] CSIR-National Physical Laboratory,Polymeric & Soft Materials Section
[2] Indian Institute of Technology,Centre for Polymer Science & Engineering
来源：
Journal of Nanoparticle Research | 2013年 / 15卷
关键词：
Polyaniline; Conducting polymers; Electrical conductivity; Antistatic; EMI shielding effectiveness; Absorption loss and reflection loss;
D O I：
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中图分类号：
学科分类号：
摘要：
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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