Heterointerface Engineering of β-Chitin/Carbon Nano-Onions/Ni–P Composites with Boosted Maxwell-Wagner-Sillars Effect for Highly Efficient Electromagnetic Wave Response and Thermal Management

Abstract

The rational construction of microstructure and composition with enhanced Maxwell-Wagner-Sillars effect (MWSE) is still a challenging direction for reinforcing electromagnetic wave (EMW) absorption performance, and the related EMW attenuation mechanism has rarely been elucidated. Herein, MWSE boosted β-chitin/carbon nano-onions/Ni–P composites is prepared according to the heterointerface engineering strategy via facile layer-by-layer electrostatic assembly and electroless plating techniques. The heterogeneous interface is reinforced from the aspect of porous skeleton, nanomaterials and multilayer construction. The composites exhibit competitive EMW response mechanism between the conductive loss and the polarization/magnetic loss, as describing like the story of “The Hare and the Tortoise”. As a result, the composites not only achieve a minimum reflection loss (RLmin) of − 50.83 dB and an effective bandwidth of 6.8 GHz, but also present remarkable EMW interference shielding effectiveness of 66.66 dB. In addition, diverse functions such as good thermal insulation, infrared shielding and photothermal performance were also achieved in the hybrid composites as a result of intrinsic morphology and chemicophysics properties. Therefore, we believe that the boosted MWSE open up a novel orientation toward developing multifunctional composites with high-efficient EMW response and thermal management.

Metal Ions Confined in Periodic Pores of MOFs to Embed Single‐Metal Atoms within Hierarchically Porous Carbon Nanoflowers for High‐Performance Electromagnetic Wave Absorption

“…This means that Ni-SA/HPCF featuring the large specific surface area and abundant pores can not only improve the impedance matching characteristics, but also provide more edges as the polarization centers to increase the polarization loss, which is conducive to EMW absorption capability of the material. [21,22] Furthermore, the large pore volume endows Ni-SA/HPCF with an ultralight feature for EMW absorption.…”

Highly Flexible Fabrics/Epoxy Composites with Hybrid Carbon Nanofillers for Absorption-Dominated Electromagnetic Interference Shielding

“…The prominent peak in S-2/G/PF was found at 1730 cm −1 , which corresponds to the stretching vibrations of C = O, indicative of the presence of carboxylic acid and/or ester groups. The peaks at 1238 and 1093 cm −1 were assigned to the sp 2 hybridized carbon atoms C–H and aromatic C–O stretching vibrations, respectively [ 41 – 43 ]. This implies that the sp 3 carbon defects increased to some extent due to ultra-sonication during the hybridizing process of the SWCNT and rGO.…”

MOF-Derived Co/C and MXene co-Decorated Cellulose-Derived Hybrid Carbon Aerogel with a Multi-Interface Architecture toward Absorption-Dominated Ultra-Efficient Electromagnetic Interference Shielding

“…The resultant carbon nanofiber@Co/C aerogel reveals an absorption coefficient as high as 0.79 . Furthermore, the introduction of magnetic MOF derivatives could construct more abundant multicomponent heterogeneous architectures and enrich EMW dissipation mechanisms, which can drastically promote interfacial polarization and induce more attenuation mechanisms, thus strengthening the consumption of EMWs. ,,,− Therefore, the incorporation of magnetic MOF derivatives into hybrid carbon aerogels may be a feasible approach to construct multiple-component heterostructures with electric/magnetic cooperative loss and achieve ultra-efficient EMI SE with highly absorbed capability.…”