Engineering closed-cell structure in lightweight and flexible carbon foam composite for high-efficient electromagnetic interference shielding

Yimin Sun, Shaohong Luo, Helei Sun, Wei Zeng, Chenxi Ling, Dugang Chen, Vincent Chan, Kin Liao

Research output: Contribution to journalArticlepeer-review

115 Scopus citations

Abstract

In this work, we develop a specifically engineered variant of carbonized melamine foam (cMF) by carrying systematic structural modifications with Au nanoparticles, graphene (G), Fe3O4 (IO) and poly(dimethyl siloxane) (PDMS). Our main goal is to construct a lightweight and flexible cMF composite with tailored 3D hierarchical architecture for achieving high-efficiency in electromagnetic interference (EMI) shielding. By capitalizing on the synergistic effect of the multifunctional components in the fabrication of the typical closed-cell structure, cMF-Au-G-IO/PDMS composite produced herein demonstrates superior physical properties including low density (116 mg/cm3), high conductivity (81.3 S/m), large specific surface area (708 m2/g), proven superparamagnetism (Ms = 22.6 emu/g), and moderate compressive strength (110 KPa), collectively leading to the significant attenuation effect towards EMI. The cumulative EMI shielding effectiveness (SE) of cMF-Au-G-IO/PDMS film with a thickness of 2 mm is determined as 30.5 dB in X band (8.2–12.4 GHz). Interestingly, SE is further raised up to 52.5 dB when the film thickness is increased to 10 mm. Hence, we envision the emergence of multifunctional cMF-based composite as a promising engineering system for fulfilling the demanding applications in EMI shielding.

Original languageBritish English
Pages (from-to)299-308
Number of pages10
JournalCarbon
Volume136
DOIs
StatePublished - Sep 2018

Keywords

  • Carbonized melamine foam
  • Electromagnetic interference shielding
  • FeO
  • Graphene

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