Low percolation threshold and electromagnetic shielding effectiveness of nano-structured carbon based ethylene methyl acrylate nanocomposites

Subhadip Mondal, Sayan Ganguly, Poushali Das, Dipak Khastgir, Narayan Ch Das

Research output: Contribution to journalArticlepeer-review

130 Scopus citations

Abstract

In the present work, we developed industrially scalable and affordable Ketjen carbon black (K-CB)-ethylene methyl acrylate copolymer (EMA) composites with low percolation threshold and efficient electromagnetic interference (EMI) shielding efficiency associated with high potential of absorption dominance of electromagnetic (EM) radiations by conductive dissipation. The dispersion and distribution of K-CB inside the EMA elastomer have been affirmed with the help of qualitative electron micrograph techniques. The EMA matrix and K-CB filler interactions have been corroborated through bound rubber content and dynamic mechanical properties. Interfacial interactions between K-CB and polymer matrix are pivotal in determining the good reinforcing efficiency with tunable electrical conductivity as well as adjustable EMI shielding ability in K-CB filled composites. The proposed composites lead to a low percolation threshold (8.6 wt%) and promising high EMI shielding value of 33.9 dB for 20 wt% K-CB in the X-band frequency as compared to other expensive carbon fillers. On account of the thorough analysis of the composites, our high hopes have been placed on the promotion of low budget and flexible EMA/K-CB composite for the emerging field of superior EMI shielding applications.

Original languageEnglish
Pages (from-to)41-56
Number of pages16
JournalComposites Part B: Engineering
Volume119
DOIs
StatePublished - 15 Jun 2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Ltd

Keywords

  • Electrical property
  • Electromagnetic interference shielding
  • Ethylene methyl acrylate copolymer
  • Ketjen carbon black
  • Mechanical properties
  • Polymer-filler interaction
  • Thermal properties

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