With the advent of the information age, the popularization of various types of electronic devices not only brings convenience to human life but also causes a series of electromagnetic interference (EMI) problems. [1][2][3][4][5][6] These series of problems could damage the highly sensitive electronic equipment as well as endanger our health. Therefore, the intensity of electromagnetic radiation must be reduced to an acceptable range. EMI shielding materials are an effective method to solve electromagnetic pollution. [7][8][9][10][11][12][13] Among numerous EMI shielding materials, nanocarbon materials (carbon fiber, graphene, carbon nanotubes, [14] MXene, [15] etc.) have broad application prospects in a series of new engineering fields such as EMI shielding, electronics, energy storage due to their excellent electrical conductivity, low specific gravity, and strong chemical stability. It is these excellent characteristics that make nanocarbon materials gradually become a hot research object pursued by people. In the past decade, graphene materials have developed rapidly and have been widely explored in various fields. Because of the unique electronic structure and excellent conductivity, graphene (or reduced graphene oxide (rGO) has been considered as good candidates for EMI shielding materials. [16][17][18][19] However, pure graphene is hydrophobic, which will affect the subsequent assembly operation. Graphene oxide (GO), with many oxygen functional groups on the graphene layer, is hydrophilic. [20] Meanwhile, the introduction of oxygen functional groups can make GO nanosheets assemble easily. [21] However, the conductivity of GO is much lower than that of graphene due to its serious functionalization of the conjugated network, which has been a stumbling block for EMI shielding applications. [22][23][24] Therefore, reduction treaent is generally used to reduce GO to increase the conductivity. [25][26][27][28][29] Shen et al. used the hydrazine-foaming method to achieve simultaneous reduction and foaming of GO nanosheets. [30] Due to the existence of the internal microporous structure, the graphene foam obtained by this one-step method causes incident electromagnetic waves to be reflected internally. Thus, the EMI shielding efficiency effectiveness is improved. Chen et al. prepared porous graphene aerogels through hydrothermal synthesis and high-temperature annealing. [31] Phenolic resin was introduced to effectively combine graphene sheets and retain 3D network structure of graphene aerogels. These researches have also broadened the application range of graphene materials.MXene, 2D transition-metal carbides and nitrides, has attracted extensive attention in many fields such as energy, optics, catalysis, and so on. [32][33][34][35][36][37][38][39][40] MXene can be used to prepare high-performance EMI shielding materials because of their excellent conductivity, [41] high aspect ratio layered structure, and rich functional groups. [42][43][44][45][46] Fan et al. prepared a mixed foam of graphene and MXene by freeze...

As the working environment becomes more complex, the visualization of windows in electronic devices increasingly requires transparent and flexible electromagnetic interference (EMI) shielding films. There is a need for materials with EMI shielding properties, while maintaining excellent high light transmission and good thermal insulation. However, the preparation of such multifunctional materials remains challenging due to the respective mechanisms of action of the different properties. Herein, a multilayer structure strategy is proposed to fabricate transparent and flexible indium tin oxide (ITO)/silver nanowire (AgNW) composite films, achieving a multifunctional integration of high light transmission, strong EMI shielding, and good thermal insulation properties of the composite films. Simultaneously, the layered structure was designed and the potential optimization mechanism of the EMI shielding performance of the composite film was analyzed, providing great flexibility for the preparation of transparent composite films. The combination of excellent EMI shielding performance, outstanding near-infrared shielding performance, and high light transmittance makes the ITO/AgNW (IA) composite films promising for abundant potential applications.

The recycling of solid plastic waste has been a major challenge to the sustainable development of today's society. Herein, one of the commonly wasted plastic raw materials, linear low‐density polyethylene (LLDPE), is used as the carbon source to explore high‐value porous carbon composites for microwave absorption applications. The carbon composites are simply obtained through the delicate carbonization of LLDPE, followed by in situ introducing Ni nanoparticles (NPs) into the carbon monolith. The porous carbon composites show a minimum reflection loss (RLmin) value of −52.2 dB at 1.65 mm, which demonstrates excellent microwave absorption properties of the wasted plastic‐derived carbon materials. In addition, the anticorrosion performance of the carbon composites is evaluated by electrochemical technique. Above all, the current study provides a new idea and simple strategy for processing wasted plastics to high‐value porous carbon materials.

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