Porous Structure Fibers Based on Multi‐Element Heterogeneous Components for Optimized Electromagnetic Wave Absorption and Self‐Anticorrosion Performance

Small, Journal Year: 2024, Volume and Issue: 20(47)

Published: Aug. 11, 2024

Abstract The excellent performance of electromagnetic wave absorbers primarily depends on the coordination among components and rational design structure. In this study, a series porous fibers with carbon nanotubes uniformly distributed in shape pine leaves are prepared through electrospinning technique, one‐pot hydrothermal synthesis, high‐temperature catalysis method. impedance matching nanofibers structure is optimized by incorporating melamine into spinning solution, as it undergoes gas decomposition during calcination. Moreover, electronic can be modulated controlling NH 4 F content synthesis process. Ultimately, Ni/Co/CrN/CNTs‐CF specimen (P3C NiCrN12) exhibited superior performance, while achieving minimum reflection loss (RL min ) −56.18 dB at thickness 2.2 mm maximum absorption bandwidth (EAB max 5.76 GHz 2.1 mm. This study presents an innovative approach to fabricating lightweight, thin materials exceptional properties wide optimizing three key factors influencing performance.

Language: Английский

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Multifunctional flexible carbon fiber felt@nickel composite films with core–shell heterostructure: Exceptional Joule heating capability, thermal management, and electromagnetic interference shielding

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 494, P. 153221 - 153221

Published: June 17, 2024

Language: Английский

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Spontaneous Orientation Polarization of Anisotropic Equivalent Dipoles Harnessed by Entropy Engineering for Ultra-Thin Electromagnetic Wave Absorber

Nano-Micro Letters, Journal Year: 2024, Volume and Issue: 17(1)

Published: Sept. 26, 2024

Abstract The synthesis of carbon supporter/nanoscale high-entropy alloys (HEAs) electromagnetic response composites by carbothermal shock method has been identified as an advanced strategy for the collaborative competition engineering conductive/dielectric genes. Electron migration modes within HEAs manipulated electronegativity, valence electron configurations and molar proportions constituent elements determine steady state efficiency equivalent dipoles. Herein, enlightened skin-like effect, a reformative using carbonized cellulose paper (CCP) supporter is used to preserve oxygen-containing functional groups (O·) fibers (CCF). Nucleation construction emblematic shell-core CCF/HEAs heterointerfaces are inextricably linked metabolism induced O·. Meanwhile, mode switchable electron-rich sites promotes orientation polarization anisotropic By virtue reinforcement strategy, CCP/HEAs composite prepared 35% ratio Mn element (CCP/HEAs-Mn 2.15 ) achieves efficient wave (EMW) absorption − 51.35 dB at ultra-thin thickness 1.03 mm. mechanisms resulting dielectric properties HEAs-based EMW absorbing materials elucidated combining theoretical calculations with experimental characterizations, which provide bases feasible strategies simulation practical application devices (e.g., ultra-wideband bandpass filter).

Language: Английский

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Hierarchical Engineering on Built‐In Electric Field of Bimetallic Zeolitic Imidazolate Derivatives Towards Amplified Dielectric Loss

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

Published: Oct. 7, 2024

Abstract Construction of built‐in electric field (BIEF) in nanohybrids has been demonstrated as an efficacious strategy to boost the dielectric loss by facilitating oriented transfer and transition charges, thus optimizing electromagnetic wave absorption property. However, specific influence BIEF on interface polarization needs explore thoroughly strength should be further augmented. Herein, several systems incorporated Mott–Schottky heterojunctions hollow structures are designed constructed, where bimetallic zeolitic imidazolate framework employed derive Cu‐ZnO heterojunctions, hierarchical enriched introducing structure reduced graphene oxide. The well‐established “double” verified theoretical calculation engineering can regulate conductivity, enhance relaxation effectively. Especially, there always coexisted both enhanced charge separation reversed distribution this BIEF, boosting polarization. Attributing synergy well‐matched impedance amplified loss, obtained hybrids exhibited superior (reflection −46.29 dB ultra‐wide effective bandwidth 7.6 GHz at only 1.6 mm). This work proves innovative model for dissecting mechanisms pioneers a novel advanced absorbers through enhancing BIEF.

Language: Английский

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Fabrication of 3D micro-flower structured BiFeO3 growing on rGO nanosheets for enhanced electromagnetic wave absorption

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 496, P. 154184 - 154184

Published: July 22, 2024

Language: Английский

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Insights into polarization relaxation of electromagnetic wave absorption

Cell Reports Physical Science, Journal Year: 2024, Volume and Issue: 5(9), P. 102206 - 102206

Published: Sept. 1, 2024

Language: Английский

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Multi‐Interfacial Heterostructure Design of Carbon Fiber/Silicone Rubber‐Oriented Composites for Microwave Absorption and Thermal Management

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

Published: July 15, 2024

Abstract In order to ensure the operation and longevity of electronic devices, design multifunctional composites integrating microwave absorption (MA) thermal conduction has become key solving problem. However, superior MA properties conductivity are usually incompatible in blend system. this study, a modified carbon fiber/silicone rubber‐oriented structure is designed based on multiscale concept heterostructures with multiple interfaces. The forward deposition‐reverse growth mechanism utilized at microscopic level construct multi‐interfacial heterogeneous structures surface 1D fibers (CFs). magneto‐electric coupling network heterostructure induces interfacial polarization enhances heat transfer. Subsequently, structural CFs carried out macroscopic scale using ice template method. directionally aligned CFs/silicone rubber aerogel obtained by backfilling silicone (SR). samples achieved an effective bandwidth 4.41 GHz maximum reflection loss −42.29 dB ultra‐thin thickness (1.3 mm). sample improved 200% compared pure rubber. directional alignment have promising applications lightweight flexible packaging.

Language: Английский

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Exploring the synergistic role of graphite and binary metal sulfides in achieving superior electromagnetic wave absorption

Composites Part A Applied Science and Manufacturing, Journal Year: 2025, Volume and Issue: unknown, P. 108751 - 108751

Published: Jan. 1, 2025

Language: Английский

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MoS2-based Composites for Microwave Absorption Mechanism-Oriented Structural Optimization and Design Perspectives

Carbon, Journal Year: 2025, Volume and Issue: unknown, P. 120233 - 120233

Published: March 1, 2025

Language: Английский

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Improving microwave absorption performance of carbonyl iron powder by regulating geometric dimensions and electromagnetic-dielectric synergism

Composites Part A Applied Science and Manufacturing, Journal Year: 2025, Volume and Issue: 190, P. 108719 - 108719

Published: Jan. 8, 2025

Language: Английский

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