Lightweight leaf-structured carbon nanotubes/graphene foam and the composites with polydimethylsiloxane for electromagnetic interference shielding

Flexible Polyimide Foams Coated with Graphene Nanoplatelets/Fe3O4 for Absorption-Dominated Electromagnetic Interference Shielding, Broad-Band Microwave Absorption, and Sensor Applications

“…In order to achieve EMI shielding and electromagnetic wave (EW) absorbing properties, the structure of EMI shielding materials is a critical factor in determining the transmission behavior of EW. − In theory, the incident EW can be weakened by reflection, absorption, and multiple internal reflections, which is a crucial way to attenuate EW. , Generally speaking, porous materials including foam, aerogel, and porous metal materials such as bronze, nickel, and so on with the multi-interface structure are conducive to multiple reflections and absorption of incident EW, thus realizing high absorption properties. ,− Foam materials are easy to prepare on a large scale and low cost and have been widely used in various fields owing to their excellent multifunctional properties, such as thermal insulation, noise absorption, and aerospace. − Moreover, the composite foam can be used in EMI shielding and EW absorption and sensing by modifying the component of the foam or adding some surface modifiers. − …”

Skin-like copper/carbon nanotubes/graphene composites and low thermogenesis during electromagnetic interference shielding

“…In our previous work, graphene/polydimethylsiloxane (PDMS) EMI shielding composites with a high EMI SE, especially absorption efficiency, were also obtained by a template method. 28…”

“…In our previous work, graphene/polydimethylsiloxane (PDMS) EMI shielding composites with a high EMI SE, especially absorption efficiency, were also obtained by a template method. 28 At present, most researches into EMI shielding composites are focused on improving the EMI SE and the absorption efficiency, because it is generally accepted that materials with a high absorption efficiency can absorb and dissipate most of the EMWs, thus reducing secondary radiation contamination caused by EMWs being reflected. [29][30][31][32][33][34][35] However, the performance stability of carbon/polymer-based composites, especially their thermal stability, is rarely mentioned.…”

“…[29][30][31][32][33][34][35] However, the performance stability of carbon/polymer-based composites, especially their thermal stability, is rarely mentioned. In our previous works, 28,36,37 the thermal performance of carbon/polymerbased EMI shielding composites was preliminarily discussed. The heat energy that affects the thermal stability of EMI shielding materials mainly comes from two aspects: the ambient temperature, which is not discussed in this paper, and the thermogenesis of the material itself during EMI shielding, which converts EMWs into heat energy due to the absorption effect of the shielding materials.…”

Flexible Graphene/MXene Composite Thin Films for High-Performance Electromagnetic Interference Shielding and Joule Heating

“…On the other hand, hybridized 2D conductive materials (e.g., reduced graphene oxide (rGO)/MXene, Ti 3 C 2 T x /rGO, and Ti 3 C 2 T x /carbon nanosheet) with lightweight and porous architectures have been recognized as promising candidates for EMI shielding applications. However, the presence of rich oxygen-containing functional groups usually leads to the obtained composite films with relatively poor electrical conductivity and low EMI shielding effectiveness (SE). , Additionally, conductive polymer composites (CPCs) constructed by incorporation of low-dimensional conductive fillers (e.g., 1D carbon nanotubes, ,− 2D rGO, , 2D graphene nanosheet, ,, and 2D MXene ,− ) into electrically insulating polymers have been considered as alternative EMI shielding candidate materials, but the EMI SE values of these CPCs are still unsatisfactory. Therefore, it is highly desirable to develop novel EMI shielding materials with unique structural characteristics and improved EMI shielding effectiveness.…”