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3D Porous Graphene Based Aerogel for Electromagnetic Applications
Hossein Cheraghi Bidsorkhi1,2, Alessandro Giuseppe D'Aloia3,4, Alessio Tamburrano3,4
1Department of Astronautical, Electrical and Energy Engineering, Sapienza University of Rome, via Eudossiana 18, 00184, Rome, Italy. hossein.cheraghibidsorkhi@uniroma1.it.
Scientific Reports
|November 2, 2019
Summary
This study introduces a lightweight, cost-effective graphene aerogel composite for electromagnetic wave absorption. The material demonstrates tunable properties and stable performance, making it ideal for advanced applications.
Area of Science:
- Materials Science
- Nanotechnology
- Electromagnetism
Background:
- Lightweight, multifunctional electromagnetic (EM) absorbing materials are vital for aerospace and electronics.
- 3D porous graphene aerogels are gaining interest due to their unique properties.
Purpose of the Study:
- To develop a cost-effective, lightweight 3D porous graphene-based aerogel for EM wave absorption.
- To investigate the tunability of thermal, electrical, and mechanical properties through processing temperature.
- To assess the EM absorption performance and environmental stability of the developed aerogel.
Main Methods:
- Fabrication of a poly(vinylidene fluoride) (PVDF) polymer matrix filled with graphene nanoplatelets (GNPs).
- Controlled processing temperatures at 65°C and 85°C to tune material properties.
- Characterization of EM absorption, thermal conductivity, mechanical stability, and water repellency.
Main Results:
- Graphene aerogels exhibited exceptional EM properties with qualified bandwidths of 9.2 GHz and 6.4 GHz.
- Reflection coefficients below -10 dB and -20 dB were achieved, indicating effective EM absorption.
- The aerogels demonstrated excellent thermal conductivity and stable volume under temperature variations.
- Water-repellent composites were produced, ensuring stable EM and thermal performance in humid environments.
Conclusions:
- The developed graphene aerogel composite offers a promising solution for lightweight, high-performance EM wave absorption.
- Tunable processing parameters allow for customization of material properties for specific applications.
- The material's stability in varying environmental conditions enhances its practical utility in demanding fields.
