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A Two-Layer Graphene Nonwoven Fabric for Effective Electromagnetic Interference Shielding.

Ying Wu1, Haijun Tang1, Liying Kang1

  • 1School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China.

Materials (Basel, Switzerland)
|August 10, 2024
PubMed
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Light, science & applications·2026

A new two-layer graphene nonwoven fabric (2-gNWF) offers superior electromagnetic interference (EMI) shielding. This lightweight material achieves 80 dB EMI shielding effectiveness, addressing the growing need for advanced shielding solutions.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Electrical Engineering

Background:

  • Increasing proliferation of electronic devices intensifies electromagnetic interference (EMI) challenges.
  • Demand for advanced, lightweight EMI shielding materials is rapidly growing.
  • Existing materials often struggle to balance shielding effectiveness with low density.

Purpose of the Study:

  • To develop a novel two-layer graphene nonwoven fabric (2-gNWF) for enhanced EMI shielding.
  • To investigate the EMI shielding mechanisms of the 2-gNWF structure.
  • To evaluate the performance of 2-gNWF in terms of shielding effectiveness and density.

Main Methods:

  • Fabrication of a two-layer graphene nonwoven fabric (2-gNWF) with distinct porous and dense layers.
Keywords:
electromagnetic interference shieldinggraphenenonwoven fabrictwo layer

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  • Characterization of the 2-gNWF's structural properties and density.
  • Measurement of EMI shielding effectiveness (SE) across relevant frequencies.

    • Main Results:

    • The 2-gNWF demonstrated a remarkable EMI shielding effectiveness (SE) of 80 dB.
    • The material exhibited an exceptionally low density of 0.039 g/cm³.
    • Performance surpassed many existing graphene-based EMI shielding materials.

    Conclusions:

    • The 2-gNWF's unique structure effectively dissipates electromagnetic energy through reflection, multiple reflections, and absorption.
    • The combination of high SE and low density makes 2-gNWF highly suitable for lightweight shielding applications.
    • This novel material shows significant potential for addressing modern EMI shielding requirements.