Multifunctional MXene/C Aerogels for Enhanced Microwave Absorption and Thermal Insulation

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: Aug. 9, 2023

Two-dimensional transition metal carbides and nitrides (MXene) have emerged as promising candidates for microwave absorption (MA) materials. However, they also some drawbacks, such poor impedance matching, high self-stacking tendency, density. To tackle these challenges, MXene nanosheets were incorporated into polyacrylonitrile (PAN) nanofibers subsequently assembled a three-dimensional (3D) network structure through PAN carbonization, yielding MXene/C aerogels. The 3D effectively extends the path of microcurrent transmission, leading to enhanced conductive loss electromagnetic (EM) waves. Moreover, aerogel's rich pore significantly improves matching while reducing density MXene-based absorbers. EM parameter analysis shows that aerogels exhibit minimum reflection (RLmin) value - 53.02 dB (f = 4.44 GHz, t 3.8 mm), an effective bandwidth (EAB) 5.3 GHz (t 2.4 mm, 7.44-12.72 GHz). Radar cross-sectional (RCS) simulations employed assess radar stealth effect aerogels, revealing maximum RCS reduction perfect electric conductor covered by aerogel reaches 12.02 m2. In addition MA performance, demonstrates good thermal insulation 5-mm-thick can generate temperature gradient over 30 °C at 82 °C. This study provides feasible design approach creating lightweight, efficient, multifunctional

Language: Английский

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"Three-in-One" Multi-Scale Structural Design of Carbon Fiber-Based Composites for Personal Electromagnetic Protection and Thermal Management

Nano-Micro Letters, Journal Year: 2023, Volume and Issue: 15(1)

Published: July 10, 2023

Wearable devices with efficient thermal management and electromagnetic interference (EMI) shielding are highly desirable for improving human comfort safety. Herein, a multifunctional wearable carbon fibers (CF) @ polyaniline (PANI) / silver nanowires (Ag NWs) composites "branch-trunk" interlocked micro/nanostructure were achieved through "three-in-one" multi-scale design. The reasonable assembly of the three kinds one-dimensional (1D) materials can fully exert their excellent properties i.e., superior flexibility CF, robustness PANI, splendid conductivity AgNWs. Consequently, constructed flexible composite demonstrates enhanced mechanical tensile stress 1.2 MPa, which was almost 6 times that original material. This is mainly attributed to fact PNAI (branch) firmly attached CF (trunk) polydopamine (PDA), forming robust structure. Meanwhile, possesses insulation heat preservation capacity owing synergistically low emissivity. More importantly, conductive path established by 1D greatly improved its EMI property Joule heating performance at applied voltage. work paves way rational utilization intrinsic materials, as well provides promising strategy designing protection energy devices.

Language: Английский

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Recent advances of carbon-based electromagnetic wave absorption materials facing the actual situations

Carbon, Journal Year: 2023, Volume and Issue: 208, P. 390 - 409

Published: April 5, 2023

Language: Английский

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An environmentally friendly chitosan-derived VO2/carbon aerogel for radar infrared compatible stealth

Carbon, Journal Year: 2023, Volume and Issue: 213, P. 118313 - 118313

Published: July 21, 2023

Language: Английский

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Achieving superior electromagnetic wave absorbers with 2D/3D heterogeneous structures through the confinement effect of reduced graphene oxides

Carbon, Journal Year: 2023, Volume and Issue: 213, P. 118245 - 118245

Published: June 24, 2023

Language: Английский

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Structure–Activity Relationship in Microstructure Design for Electromagnetic Wave Absorption Applications

Small Structures, Journal Year: 2023, Volume and Issue: 4(11)

Published: Aug. 8, 2023

Microwave absorbing materials (MAMs) are that effectively absorb incident electromagnetic (EM) wave energy, reducing reflection and scattering. They play a crucial role in enhancing electronic reliability, healthcare, defense security. However, traditional MAMs like ferrites, magnetic metals, polymers possess certain limitations, including low impedance matching, narrow absorption bandwidth, poor chemical stability, high filling ratio, which hinder their further development. To address the requirements of lightweight, wideband, high‐efficiency absorption, precise structural design has emerged as captivating research focus. Additionally, comprehending structure – property relationships between these unique microstructures EM response loss mechanisms still poses significant challenges. Herein, comprehensive review is presented with varied designs encompassing various scales, providing detailed introduction relationship potential corresponding characteristics mechanisms. Moreover, theoretical calculation models, characterization, analysis methods discussed. Finally, article proposes challenges prospects for development absorbers.

Language: Английский

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Progress in microwave absorbing materials: A critical review

Advances in Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 327, P. 103143 - 103143

Published: April 4, 2024

Language: Английский

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Anion-substitution interfacial engineering to construct C@MoS2 hierarchical nanocomposites for broadband electromagnetic wave absorption

Journal of Colloid and Interface Science, Journal Year: 2023, Volume and Issue: 651, P. 1 - 8

Published: July 27, 2023

Language: Английский

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Achieving Broadband Microwave Shielding, Thermal Management, and Smart Window in Energy‐Efficient Buildings

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

Published: Oct. 8, 2024

Abstract Energy‐efficient building materials are eye‐catching for reducing indoor energy consumption via eliminating electromagnetic interference and pollution, controlling the thermal transfer, promoting sunlight harvesting providing a comfortable living environment. To realize broadband microwave shielding, elaborate control of microstructures has showed great potential research direction. By composition regulation structure design with various dimension, synergistic effects including conductive networks, interfacial polarization, magnetic coupling, dipole dielectric‐magnetic synergy, can significantly improve (EM) shielding capacity. Thermal management conversion, storage, radiation, conduction enormous in enhancing sustainability efficiency future buildings. Smart windows able to switch optical transmittance colors, which is contributed saving energy. Herein, this review, recent progress management, smart window field energy‐efficient buildings summarized, from aspects materials, mechanisms, scenarios. Further, main bottlenecks problems discussed, opportunities further highlighted.

Language: Английский

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Research progress on high-performance electromagnetic interference shielding materials with well-organized multilayered structures

Materials Today Physics, Journal Year: 2024, Volume and Issue: 40, P. 101330 - 101330

Published: Jan. 1, 2024

Language: Английский

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