Researchers from China's Nanjing University of Science and Technology and Chinese Academy of Sciences (CAS) have developed lightweight and structurally controllable 3D reduced graphene oxide frameworks decorated with magnetic components (MRGO frameworks) via 3D printing technology to tailor EMI shielding properties.
The team explains that by adjusting the preparation conditions of the MRGO frameworks, such as inter-filament spacing, composition, and pyrolysis temperature, the graphitization degree and transmission paths are influenced, enabling electrical conductivity and magnetic property, and ensuring excellent EMI shielding performance.
Specifically, the average EMI shielding effectiveness of the MRGO framework in the K-band and Ka-band is 44.95 dB and 53.90 dB, respectively. Furthermore, the 3D MRGO frameworks follow a reflection-dominated EMI shielding mechanism.
By adjusting the printing spacing and pyrolysis temperature, the MRGO frameworks exhibit varying electrical conductivity and EMI shielding properties.
This work provides insights into the development of EMI shielding materials through structural design and compositional optimization.