Recent advances in construction strategies and multifunctional properties of flexible electromagnetic wave absorbing materials

Morphology evolution of core–shell carbon@mesoporous carbon microspheres with excellent microwave absorption performance

“…Based on transmission line theory, MA performance can be evaluated by the RL value, which is calculated by substituting electromagnetic parameters into the following formulae: 31–33 RL(dB) = 20 log|( Z in − Z 0 )/( Z in + Z 0 )|where Z in and Z 0 represent the impedance of the absorber and free space, ε r and μ r are the complex permittivity and permeability, f is the frequency of the microwave, d represents the thickness of the absorber, and c is the velocity of the microwave in free space. In general, the effective absorption bandwidth means the frequency range in which RL values are less than −10 dB.…”

A rare‐earth‐based nano‐flame retardant with 2D MXene for improving fire safety and mechanical property of thermoplastic polyurethane composites

“…Compared with other TPU composites, the smoke density curve of TPU/CMX-3.0 with the addition of 3.0 wt% MXene or CePO 4 decreased. It was explained that the smoke particles were converted into residual char by rare earth catalyst and Ti element, confirming the synergistic smoke suppression effect of cerium element and MXene during the combustion of TPU composites 11,[26][27][28].…”

“…Besides the above rare-earth flame retardants, the catalytic transition metal titanium composition, and two-dimensional structure has made MXenes a candidate for flame-retardant polymerical composites. [21][22][23][24][25][26][27] Transition metal carbides and nitrides (MXene) have become one of the most intensively studied objects among the catalyst, photothermal conversion, field effect transistor, and topological insulator fields. [28][29][30][31][32][33] A variety of functional groups introduced by etching and stripping, on a large scale in the lateral direction, have led to the possible reactivity of MXene.…”

Nanometer-Sized Carbon Black and Fe3O4 Nanoparticles Incorporated into Polyamide-66 Composite Fibers and Woven into Three-Dimensional Fabrics for Electromagnetic Absorption

“…1,2 High-performance EM-wave absorption materials with lightweight, good mechanical strength, high flexibility, tailor ability, and secondary processability are highly demanded to satisfy both the EM wave absorption and wearability of smart electronics. 3,4 The leading strategy to realize high-performance EM-wave absorption is tailoring the impedance matching and improving the dielectric-magnetic loss capabilities of the EM-wave absorption materials. 5 The good impedance matching of a material facilitates the efficient transmission and scattering of the incident EM wave within the material, leading to effective EM-wave capture.…”

“…The rapid development of next-generation wearable electronic devices has been offering great convenience to the daily life of human beings while resulting in the inevitable electromagnetic (EM) radiation pollution, which is an omnipresent issue that causes serious effects on electronic devices and human health. , High-performance EM-wave absorption materials with lightweight, good mechanical strength, high flexibility, tailor ability, and secondary processability are highly demanded to satisfy both the EM wave absorption and wearability of smart electronics. , …”