Multilayer WPU conductive composites with controllable electro-magnetic gradient for absorption-dominated electromagnetic interference shielding

Recent Advancement of Electromagnetic Interference (EMI) Shielding of Two Dimensional (2D) MXene and Graphene Aerogel Composites

“…Further, the heat treated monolayer MXene with 4.14 × 10 −5 mm of thickness shows EMI SE of 17.13 dB and corresponding SSE and SSE/t are 7.17 dB•cm 3 •g −1 and 1.73 × 106 dB•cm 2• g −1 , respectively. The corresponding composite (without heat process) with the same thickness displays EMI SE, SSE, and SSE/t of 13.56 dB, 5.67 dB•cm 3 •g −1 , and 1.37 × 10 6 dB•cm 3 •g −1 , respectively. It is apparent that the annealing at 600 • C improve EMI SE and other parameters significantly [43].…”

“…The corresponding composite assembled like brick-and-mortar like arrangement with internal pores which provide reflection and scattering interfaces that improve EMI SE [61]. Further, the heat treated monolayer MXene with 4.14 × 10 −5 mm of thickness shows EMI SE of 17.13 dB and corresponding SSE and SSE/t are 7.17 dB•cm 3 •g −1 and 1.73 × 106 dB•cm 2• g −1 , respectively. The corresponding composite (without heat process) with the same thickness displays EMI SE, SSE, and SSE/t of 13.56 dB, 5.67 dB•cm 3 •g −1 , and 1.37 × 10 6 dB•cm 3 •g −1 , respectively.…”

“…The nacre-mimetic structure is an inspired structure for 2D materials such as MXene and GN which exert excellent EMI shielding (Figure 9). The graphene/PDMS polymer aerogel composite shows EMI SE of about 65 dB with the low GN loading (0.42 wt.%) and corresponding SSE and density are 100 dB•cm 3 •g −1 , 0.0042 g•cm −3 , respectively [8]. The physical or chemical process of the constitutional element of the composite determine the EMI shielding and other parameter of the composite.…”

“…Thus, pyrolysis of the GN based polymer composite greatly improve EMI shielding and other parameters such as EC, dielectric property, porous structure, permeability, etc. The CNTs co−decorated porous carbon/graphene/PDMS foam generate 48 dB of shielding ability and corresponding SSE is 347.8 dB•g −1 •cm 3 . The composite consists multilayer of components those design is better than that of the Zhu et al study.…”

“…The EMP creates complexities in the natural electromagnetic environment, and is unwanted radiation which not only disturbs the general function of surrounding electronic systems but also threatens the well−being of humans [1][2][3][4][5][6][7][8]. This disturbing phenomenon is called electromagnetic interference (EMI) and it causes data theft, malfunction of the electronic devices, degradation of basic function of electronic devices, and vulnerability of the personal security in electronic components, while grounding problems in humans such as mutation, insomnia, headache, leukemia, damage the organs, thermal injuries, and cancer [1][2][3][4][5]. In addition, expansion of digital networks and sensitive remote-controlled systems demanding high quality densely built electronic control systems, creates un-compatible environments (UCE) or electromagnetic noise (EMN) or EMI and the current of electrodynamic and basic field are essential sources of EMI.…”