Interfacial Polarization Loss Improvement Induced by the Hollow Engineering of Necklace‐like PAN/Carbon Nanofibers for Boosted Microwave Absorption

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 28, 2024

Abstract Rational manipulation of composition and microstructure design is recognized as an effective pathway to realize multifunctional high‐performance microwave absorber. In this work, necklace‐like hollow polyacrylonitrile (PAN)/carbon nanofibers are designed constructed through a simple continuous electrospinning‐carbonization‐etching route. Specifically, by varying the carbonization temperature, ratio PAN carbon content PAN/carbon can be effectively regulated, resulting in tunable electromagnetic parameters conductive loss capacities. After that, structure further introduced improve feature lightweight, impedance‐matching characteristics, interfacial polarization ability. Accordingly, exhibited frequency bandwidth 6.60 GHz minimum reflection −44.73 dB at 1.76 mm. Both experimental theoretical simulation results indicated that obtained possessed high chemical stability excellent absorbing performance, endowing them candidates for absorbers extreme conditions. Therefore, findings not only offered rationally manipulate but also provided novel technique make most engineering strengthening interface loss.

Language: Английский

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Constructing multiple heterogeneous interfaces in one-dimensional carbon fiber materials for superior electromagnetic wave absorption

Carbon, Journal Year: 2024, Volume and Issue: 226, P. 119233 - 119233

Published: May 11, 2024

Language: Английский

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Multifunctional cellular carbon foams derived from chitosan toward self-cleaning, thermal insulation, and highly efficient microwave absorption properties

Nano Research, Journal Year: 2023, Volume and Issue: 17(3), P. 927 - 938

Published: Nov. 30, 2023

Language: Английский

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Recent progress in carbon-based materials and loss mechanisms for electromagnetic wave absorption

Carbon, Journal Year: 2024, Volume and Issue: 219, P. 118834 - 118834

Published: Jan. 18, 2024

Language: Английский

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Fabrication of hollow Ni/NiO/C/MnO2@polypyrrole core-shell structures for high-performance electromagnetic wave absorption

Composites Part B Engineering, Journal Year: 2024, Volume and Issue: 275, P. 111344 - 111344

Published: Feb. 24, 2024

Language: Английский

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Research progress on spherical carbon-based electromagnetic wave absorbing composites

Carbon, Journal Year: 2024, Volume and Issue: 227, P. 119244 - 119244

Published: May 13, 2024

Electromagnetic waves constitute an essential element of societal progress, and the environmental impact resulting from using electromagnetic warrants significant considerations. Carbon materials have garnered considerable attention in functional domain owing to their remarkable electrical conductivity dielectric characteristics. Notably, spherical carbon materials, characterized by substantial specific surface area tunable properties, emerged as efficient additives for microwave absorbers. These excel absorbing energy while minimizing dissipation. When incorporated into absorbers varying compositions, sizes, morphologies, these spheres facilitate synergistic operation multiple loss mechanisms, containing conductive loss, magnetic polarization loss. This concerted action significantly enhances wave absorption performance. paper offers a comprehensive review advancements sphere-based designed waves. It also furnishes intricate exposition methodologies employed preparation meticulous analysis The summarizes microstructural attributes mechanisms governing various sphere configurations, considering factors such composition, morphology, size, structure. In conclusion, this study forecasts potentials nanomaterials realm waves, along with assessment forthcoming research focal points conceivable challenges.

Language: Английский

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Insights into Civilian Electromagnetic Absorption Materials: Challenges and Innovative Solutions

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 5, 2024

Abstract The emergence and widespread adoption of fifth‐generation wireless technology in civilian sectors have advanced the information revolution, while simultaneously leading to a variety negative impacts. Foremost issues domain include electromagnetic (EM) pollution, interference, inefficient use EM energy. Despite growing global awareness, progress devising effective solutions is sluggish, underlining complexity these issues. delay addressing concerns arises from several factors, including considerable gap comprehensive understanding absence unified stance on critical Moreover, new challenges like interference energy inefficiency indicates clear need for innovative ideas approaches. Addressing extends beyond inherent properties absorbers, requiring combination tailored macro‐structural designs external field management solution. This situation emphasizes urgent diverse strategies creative thinking navigate posed by perspective underscores identified systematically proposes practical approaches each, aiming foster both conversation action this crucial area. insights provided are expected substantially aid confronting alleviating pressing concerns.

Language: Английский

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N, O‐Doped Walnut‐Like Porous Carbon Composite Microspheres Loaded with Fe/Co Nanoparticles for Adjustable Electromagnetic Wave Absorption

Small, Journal Year: 2024, Volume and Issue: 20(20)

Published: Jan. 11, 2024

Abstract This study addresses the challenge of designing simple and environmentally friendly methods for preparation effective electromagnetic wave (EMW) absorbing materials with tailored microstructures multi‐component regulation. N, O doped walnut‐like porous carbon composite microspheres loaded FeCo nanoparticles (WPCM/Fe–Co) are synthesized through high‐temperature carbonization combined soap‐free emulsion polymerization hydrothermal methods, avoiding use toxic solvents complex conditions. The incorporation magnetic components enhances loss, complementing dielectric loss to optimize EMW attenuation. unique morphology further improves impedance matching. proportions Fe Co can be adjusted regulate material's reflection thickness, bandwidth, allowing fine‐tuning absorption performance. At a low filling ratio (16.7%), optimal WPCM/Fe–Co composites exhibit minimum ( RL min ) −48.34 dB (10.33 GHz, 3.0 mm) an overall bandwidth (EAB) covering entire C bands, X Ku bands. work introduces novel approach composition regulation presents green synthesis method absorbers high‐performance at loading.

Language: Английский

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Construction of three-dimensional porous network Fe-rGO aerogels with monocrystal magnetic Fe3O4@C core-shell structure nanospheres for enhanced microwave absorption

Materials Today Physics, Journal Year: 2024, Volume and Issue: 42, P. 101383 - 101383

Published: March 1, 2024

Language: Английский

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Perspectives on metal-organic framework-derived microwave absorption materials

Journal of Material Science and Technology, Journal Year: 2024, Volume and Issue: 214, P. 37 - 52

Published: July 14, 2024

Language: Английский

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