Facile synthesis of ultra-lightweight silver/reduced graphene oxide (rGO) coated carbonized-melamine foams with high electromagnetic interference shielding effectiveness and high absorption coefficient

Constructing hierarchical structure via in situ growth of CNT in SiO2-coated carbon foam for high-performance EMI shielding application

“…(3) The increase of CNT content and length can form an effective conductive network that accelerates the attenuation of the helimagnetic wave by ohmic losses in the pores. We also compare the shielding effectiveness of CMF@5SiO 2 -30CNT/PDMS with other reported composites by CMF-based materials in the X-band as listed in Figure 10 [23, [29][30][31][32][33][34]. It can be found out the difficulty to achieve a high EMI SE performance with a thin thickness.…”

Electroless deposition of silver on aminated graphene oxide coated cotton fabric to develop high-performance electromagnetic interference shielding

“…Such signi cant property will help to reduce the secondary pollution of electromagnetic waves in our surroundings. The absorbance dominant mechanism can be attributed due to the carbon based material as well as the porous structure of fabric that enable them to absorb and attenuate the radiations(Shen et al 2022). Furthermore, the comparison between SE T , SE A and SE R of all samples is represent in Fig.8 (d) that also showed absorption dominant mechanism rather than re ection inside the material.…”

“…For EMI shielding, the material exhibiting high conductivity usually has electromagnetic wave re ection coe cient exceeding 90%, meaning that a major part of incident waves is re ected into the space that results in secondary EMR pollution. Thus, obtaining an e cient and better performing EMI shielding material exhibiting low EMR re ection coe cient is yet challenging (Shen et al 2022). Among different materials for EMI shielding, conductive textiles having adjustable components and textures are known to be ideal for fabricating and designing EMI shielding materials with cost-effectiveness (Ghosh et al 2018).…”

Recent Advances in Polymer Nanocomposites for Electromagnetic Interference Shielding: A Review

“…In a recent work, lightweight silver/reduced graphene oxide-coated carbonized melamine (CMF/rGO/Ag) hybrid foams were fabricated by a simple one-step heat treatment method, and an EMI shielding of 63.2 dB was attained in the X band. 144 Due to the effective reinforcement of rGO between Ag nanoparticles and carbonized melamine frameworks, the composite had outstanding structural stability and mechanical property. The unique porous structure provided an ultrahigh specific EMI SE of 7616 dB cm 2 g –1 and high absorption coefficient of about 0.51.…”