Infrared stealth and microwave absorption properties of reduced graphene oxide functionalized with Fe3O4

In this study, we synthesized three-dimensional porous-network composites containing reduced graphene oxide (rGO) and Fe3O4 nanoparticles (rGO/Fe3O4) via hydrothermal and freeze-drying processes. These were then introduced into a smoke canister, and colloidal silicone rubber (RTV-615) was used as an infrared (IR) and microwave (MW) absorber. The infrared shielding effectiveness was investigated by measuring the thermal extinction in the smoke canister for dynamic testing using a thermal imager in the 8-12 mu m range. The microwave-absorbing properties were investigated by measuring the reflection loss in the 2-18 GHz range with a network analyzer using the free space method. For the rGO/Fe3O4 composite with concentrations of 1-3 mg/cm(3) and 1 mg/cm(3), the thermal extinction reached 30-43 degrees C and 26-35 degrees C in static testing and dynamic testing, respectively. The rGO/Fe3O4 (1:2) composite exhibited a maximum absorption value of -31.3 dB at 15.3 GHz at a thickness of 2.0 mm.

Automated summary

In this study, three-dimensional porous-network composites containing reduced graphene oxide and Fe3O4 nanoparticles were synthesized and their infrared shielding effectiveness and microwave-absorbing properties were investigated using a thermal imager and network analyzer, respectively.