Enhancing metacomposite properties and electromagnetic interference shielding: exploring the interplay between manufacturing processability of carbon fiber elastomeric composite and permittivity/permeability effects
Roberto C. Portes, Braulio H. K. Lopes, Mirabel C. Rezende, Gisele Amaral-Labat, Maurício R. Baldan
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引用次数: 0
Abstract
Aiming to maximize the electromagnetic performance of composite materials based on carbon fibers (CF), this work demonstrates a critical approach regarding important manufacturing parameters of composites, correlating the manipulation of the complex electric permittivity (ε’, ε”) and complex magnetic permeability (µ’, µ”), as well as the increase in the performance of electromagnetic interference (EMI) shielding effectiveness (SE). The electromagnetic characterization of composites based on polydimethylsiloxane (PDMS) reinforced with CF exhibited transitions in electromagnetic properties over the X-band frequency. The materials that are intrinsically dielectric induced the generation of an intense magnetic response and even the characteristic of metacomposite exhibiting negative ε’ and µ”. The samples showed transitions from a double-positive (DPS) medium to a double-negative (DNG) medium (-ε’ and -µ”) or a progression from DPS to a single-negative (SNG) medium (-µ”). Furthermore, some composites have also presented extremely high values of combined electric permittivity, magnetic permeability, Eddy current, and SE of 100.0 dB. The authors highlight the significant influence of composite processability, especially the insulator (PDMS) thickness, enabling the Maxwell–Wagner-Sillars effect and induction of an intense magnetic response. To predict/optimize the electromagnetic performance of composites, we also propose a computational simulation methodology using the Altair FEKO® software and correlate the Smith Chart with the material’s response.
期刊介绍:
Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field.
The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest.
Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials.
Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.