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Synthesis and Functionalization of 3D Nano-graphene Materials: Graphene Aerogels and Graphene Macro Assemblies
Published on: November 5, 2015
Construction of Graphene/Fe3O4@Hollow Glass Microsphere Composite Foam with Excellent Electromagnetic Interference
Huan Yue1, Shigang Li2, Yixian Lv1
1School of Chemistry and Chemical Engineering, Pingdingshan University, Pingdingshan 467000, China.
Abstract:
The development of lightweight multifunctional materials integrating electromagnetic interference (EMI) shielding, Joule heating and flame retardancy is highly demanded for advanced electronics and aerospace systems. Herein, we fabricate graphene/Fe3O4@hollow glass microsphere (G/Fe3O4@HGM) composite foam with an ultralow density of 0.36 g/cm-3. The porous structure synergizes graphene's conductivity, Fe3O4's magnetism and HGM's low thermal conductivity to optimize impedance matching. The foam delivers absorption-dominated EMI shielding with a maximum X-band shielding effectiveness (SE) of 60.1 dB and an average absorption coefficient of 0.56, which effectively suppresses secondary electromagnetic reflection pollution. The composite exhibits stable voltage-controllable Joule heating: the 25 wt% Fe3O4@HGM sample reaches 91.3 °C at 16 V, enabling rapid de-icing within 200 s and stable thermal maintenance at -20 °C. Flame tests confirm no combustion or structural collapse under open flame. This work provides a simple fabrication strategy for lightweight multifunctional materials applicable to aerospace stealth, electronic thermal management and anti-icing systems.
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