Development of non-oxidized graphene flakes (NOGF)/polyvinylidene fluoride (PVDF) composites for high-performance EMI shielding efficiency

As numerous communication devices use multiband electromagnetic waves in modern society, electromagnetic interference (EMI) shielding materials become increasingly important due to the harmful effects of electromagnetic waves. While metal-based materials have shown high shielding performance, they h...

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Bibliographic Details
Published in:Molecular Crystals and Liquid Crystals 2024-07, Vol.768 (11), p.410-415
Main Authors: Lee, Ja Yoon, Hwang, In Hyeok, Yang, Hyun Seong, Kim, Jungmo, Kim, Jin, Jun, Yun-Seok
Format: Article
Language:English
Subjects:
Composites
Conducting polymers
Corrosion effects
Corrosion resistance
Electrical properties
Electrical resistivity
Electromagnetic interference
Electromagnetic radiation
Electromagnetic shielding
EMI shielding
Exfoliation corrosion
Fabrication
Flakes
Fluorides
Graphene
Graphite
non-oxidative graphene flakes (NOGF)
Polymer matrix composites
Polymers
Polyvinylidene fluorides
PVDF
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Summary:As numerous communication devices use multiband electromagnetic waves in modern society, electromagnetic interference (EMI) shielding materials become increasingly important due to the harmful effects of electromagnetic waves. While metal-based materials have shown high shielding performance, they have many drawbacks such as high density, high processing cost, and low corrosion resistance. Conductive polymer composites (CPCs), which can overcome these shortcomings of metal-based materials, have become increasingly popular in recent years. In this study, non-oxidized graphene flakes (NOGFs) are synthesized by exfoliating the ternary graphite intercalant compound (t-GIC) and used as fillers for CPCs. The electrical conductivity and EMI shielding effiency (SE) of NOGF/polyvinylidene fluoride (PVDF), graphite/PVDF and reduced graphene oxide (rGO)/PVDF composites are investigated. NOGF/PVDF composites showed notably enhanced electrical conductivity and EMI SE than the others. This is mostly due to the non-oxidative fabrication method that does not destroy the sp 2 structure of graphene sheet, thus preserving the unique electrical properties of graphene.
ISSN:1542-1406
1563-5287
1527-1943
DOI:10.1080/15421406.2024.2353946