Electrospun MXene Nanosheet/Polymer Composites for Electromagnetic Shielding and Microwave Absorption: A Review

Abstract

Electromagnetic wave pollution in the living environment seriously affects our health, so it is important to develop an excellent electromagnetic interference (EMI) shielding or microwave absorbing (MA) material. MXene has a high chemically active surface, natural structural defects, surface hydrophilicity, high electrical conductivity, structural stability and easy processability, and is a potential shielding and absorbing material. Compounded with other materials, EMI shielding and MA properties of MXene have been actively studied and greatly improved. This review presents the recent advances on electrospun MXene nanosheet/polymer composites for multifunctional EMI shielding. Particularly, the challenges to development and prospects of the combination of MXene and electrospinning technology are addressed to provide a broader perspective.

Flexible Multilayered Poly(vinylidene fluoride)/Graphene-Poly(vinylidene fluoride) Films for Efficient Electromagnetic Shielding

“…The formation of a good conductive network is an important factor to achieve efficient EMI SE. Figure c shows the cross-sectional SEM morphology of PVDF/GNP film, in which a good graphene conductive network can be seen, which is conducive to the efficient transmission of electrons at various heterogeneous interfaces and the improvement in the conductivity of the composite, thus enhancing its EMI SE performance . Besides, the large number of pores that exist in the conductive network might be beneficial to improving the multiple reflection and absorption of the electromagnetic waves when it propagates within the film .…”

“…Figure 3c shows the crosssectional SEM morphology of PVDF/GNP film, in which a good graphene conductive network can be seen, which is conducive to the efficient transmission of electrons at various heterogeneous interfaces and the improvement in the conductivity of the composite, thus enhancing its EMI SE performance. 57 Besides, the large number of pores that exist in the conductive network might be beneficial to improving the multiple reflection and absorption of the electromagnetic waves when it propagates within the film. 58 During the hotpressing procedure, most of the pores on the surface of the film were closed, so the specific surface area measured is only 0.4285 m 2 /g, and the pore size distribution is in the range of <100 nm, which implies that the surface of the film becomes dense and smooth through hot pressing.…”

MXene-Based Nanomaterials for Multifunctional Applications

“…In this regard, to protect electrical and electronic equipment from EMI, it is necessary to develop an efficient shielding material with minimal transmittance. MXenes and MXene-based composites have a more excellent EMI shielding effect than conventional materials; for instance, 2D C-based materials (e.g., expanded graphite, graphene, reduced graphene oxide), metals (e.g., silver, aluminum, copper), and metallic fillers [ 93 ]. Three MXene films have been extensively investigated for EMI shielding applications, including single-metal Ti 3 C 2 T x , ordered double-metal Mo 2 TiC 2 T x , and Mo 2 Ti 2 C 3 T x MXene.…”

High-Performance Microwave Absorption Materials: Theory, Fabrication, and Functionalization

“…The combination of dielectric loss and magnetic loss can not only improve the impedance matching, but also enhance the microwaves attenuation. 128 Herein, we introduce some electromagnetic synergistic loss MAMs, mainly including carbon-based magnetic MAMs combining carbon and magnetic materials, and MXene-based composite MAMs based on MXene and other materials.…”