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Researchers developed lightweight, sustainable protein-derived aerogels for electromagnetic interference (EMI) shielding. These hierarchically porous graphitic aerogels offer superior performance and tunable properties for advanced electronic applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electromagnetics

Background:

  • Growing demand for effective electromagnetic interference (EMI) shielding materials in integrated electronic systems.
  • Need for lightweight, sustainable, and high-performance shielding solutions.

Purpose of the Study:

  • Investigate EMI shielding performance of hierarchically porous graphitic aerogels (HGAs) derived from albumen protein.
  • Explore the influence of processing parameters on HGA properties and shielding effectiveness.

Main Methods:

  • Synthesis of HGAs from albumen protein via controlled pyrolysis.
  • Tuning carbonization temperature, heating rate, and sample thickness.
  • Characterization of microstructure, density, electrical conductivity, and EMI shielding behavior.

Main Results:

  • Achieved outstanding specific shielding effectiveness (>16,200 dB cm² g⁻¹), exceeding existing single-component carbon aerogels.
  • Demonstrated control over microstructure, density, and electrical properties through processing.
  • Enabled tunable attenuation mechanisms (reflection vs. absorption).

Conclusions:

  • Protein-derived HGAs offer a simple, tunable, and high-performance platform for EMI shielding.
  • Potential applications in aerospace, electronics, and wireless communication technologies.
  • Absorption-dominated shielding is promising for mitigating secondary electromagnetic pollution.