Ultrathin carbon foams for effective electromagnetic interference shielding

By Yang Li, Bin Shen, Xueliang Pei, Yonggang Zhang, D. Yi, W. Zhai, Lihua Zhang, Xingchang Wei, Wenge Zheng. 2016

192 citations recorded by the source corpus.

Abstract Ultrathin carbon foams with the thickness about 24 μm were fabricated by the pyrolysis of polyimide/graphene composite foams. The addition of graphene was verified to stabilize the porous structure of the foams and accelerate their graphitization process simultaneously. Consequently, the well-defined carbon foams exhibited much higher electromagnetic interference (EMI) shielding effectiveness (SE) up to 24 dB over the frequency range of 8–12 GHz, in comparison with the non-foamed counterparts. The possible mechanism behind the phenomenon was attributed to their enhanced microwave absorption via the internal multiple scattering and reflections. Moreover, the SE could be further improved to 43 and 51 dB by increasing the sample thickness gradually to 51 and 73 μm, respectively. The carbon foams with high thermal stability are very promising in the fabrication of ultrathin EMI shields for thermally harsh applications.

Subfields: Aerospace Engineering, Electronic, Optical and Magnetic Materials, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/6717779134cfc9c51c7c97cbbc6ff85f9c9e7173

Citations in the corpus

• Overview of carbon nanostructures and nanocomposites for electromagnetic wave shielding (2018, unknown): “Also, it is demonstrated that SE values increased to 43 and 51 dB for 51 and 73 mm thick foams, respectively [117].”