Hierarchical porous molybdenum carbide synergic morphological engineering towards broad multi-band tunable microwave absorption

Nano Research, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 12, 2024

Language: Английский

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Hydrophobic Multilayered PEG@PAN/MXene/PVDF@SiO₂ Composite Film with Excellent Thermal Management and Electromagnetic Interference Shielding for Electronic Devices

Small, Journal Year: 2024, Volume and Issue: 20(46)

Published: Aug. 7, 2024

Abstract With the rapid development of electronic industry, it's pressing to develop multifunctional electromagnetic interference (EMI) shielding materials ensure stable operation devices. Herein, multilayered flexible PEG@PAN/MXene (Ti 3 C 2 T x )/PVDF@SiO (PMF) composite film has been constructed from level microstructure design via coaxial electrospinning, coating spraying, and uniaxial electrospinning strategies. Benefiting effective encapsulation for PEG high conductivity MXene coating, with loading density 0.70 mg cm −2 exhibits thermal energy storage 120.77 J g −1 great EMI performance (EMI SE 34.409 dB SSE 49.086 ) in X‐band (8–12 GHz). Therefore, this advanced can not only help devices prevent influence pollution but also play an important role device management. Additionally, deposition nano PVDF@SiO fibers (289 ± 128 nm) endowed PMF hydrophobic properties (water contact angle 126.5°) working hydrophilic thereby breaks limitation humid application environments. The finding paves a new way novel films

Language: Английский

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A review of how to improve Ti3C2Tx MXene stability

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 496, P. 154097 - 154097

Published: July 19, 2024

Language: Английский

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Miniaturized Hard Carbon Nanofiber Aerogels: From Multiscale Electromagnetic Response Manipulation to Integrated Multifunctional Absorbers

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(48)

Published: July 17, 2024

Abstract The multiscale structural engineering strategy presents a powerful method for tailoring the attributes of materials at various levels, enabling flexible control and manipulation their electromagnetic properties. Nonetheless, orchestrating architecture polymer‐derived carbon aerogels specifically microwave absorption poses significant challenges. Herein, aramid‐derived hard nanofiber aerogel microspheres (CNFAMs) featuring hierarchical skin‐core structure are fabricated through wet‐spinning technique, combined with reprotonation‐mediated self‐assembly carbonization processes. presence large‐scale voids between neighboring microscale porosity within themselves improves impedance matching promotes reflection scattering. distinct graphitic domains defects serve as pivotal elements conduction polarization losses, significantly impacting attenuation. By meticulously macroscale dimensions, porous architecture, nanoscale domains, optimized CNFAMs demonstrate remarkable bandwidth 9.62 GHz an ultralow filling 0.97 wt%. Additionally, implementation application‐oriented innovative integration polysilsesquioxane‐CNFAMs in host–guest is explored. This composite system brings together broadband absorption, superhydrophobicity, thermal insulation, resistance to freezing, robust tolerance harsh environments. Such multifaceted approach designed tackle growing challenges associated complex environments effectively.

Language: Английский

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Bidirectional, Multilayer MXene/Polyimide Aerogels for Ultra‐Broadband Microwave Absorption

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

Published: July 22, 2024

To obtain high-performance electromagnetic microwave (EM) absorption materials with broad effective bandwidth (EAB) and reduced thickness, designing structures has proved to be a promising way. Herein, ultra-broadband multilayer bidirectional MXene/polyimide EM aerogels containing multi-structures on scales ranging from the micro- macroscale are produced aid of electric temperature fields. On microscale, under action force gradient, ordered made aligned Ti

Language: Английский

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Fluid-Actuated Nano–Micro–Macro Structure Morphing Enables Smart Multispectrum Compatible Stealth

Nano Letters, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 19, 2024

Modern detection technology has driven camouflage toward multispectral compatibility and dynamic regulation. However, developing such stealth technologies is challenging due to different frequency-band principles. Here, this work proposes a design concept for fluid-actuated compatible smart device that employs deformable mechanochromic layer/elastomer with channeled dielectric layer. After fluid actuation, the elastomer layer transmits mechanical strain layer, thereby altering visible reflectance wavelengths in [568, 699] nm. Concurrently, pumped-in liquid reconfigures spatial structure parameter alter microwave resonance diffraction radar absorption, enabling absorption significant broadband at [8.16, 18.0] GHz. Using heat-absorption property also achieves infrared stealth, shown by ΔT ≈ 16.5 °C temperature difference. Additionally, exhibits rapid response time (∼1 s), excellent cycling performance (100 cycles), programmability (10 codes), offering new strategy.

Language: Английский

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Preparation of cellulose derived carbon/reduced graphene oxide composite aerogels for broadband and efficient microwave dissipation

Journal of Colloid and Interface Science, Journal Year: 2024, Volume and Issue: 675, P. 401 - 410

Published: July 5, 2024

Language: Английский

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Fabrication of core–shell nickel ferrite@polypyrrole composite for broadband and efficient electromagnetic wave absorption

Composites Part A Applied Science and Manufacturing, Journal Year: 2024, Volume and Issue: 188, P. 108558 - 108558

Published: Oct. 28, 2024

Language: Английский

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Tailoring electromagnetic responsiveness of Tremella-like multi-dimensional heterostructures through a self-decomposition strategy

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 157121 - 157121

Published: Oct. 1, 2024

Language: Английский

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Plasma Engineering toward Improving the Microwave-Absorbing/Shielding Feature of a Biomass-Derived Material

Langmuir, Journal Year: 2024, Volume and Issue: 40(23), P. 12148 - 12158

Published: May 28, 2024

During the past decade, ever-increasing electromagnetic pollution has excited a global concern. A sustainable resource, facile experimental scenario, fascinating reflection loss (RL), and broad efficient bandwidth are substantial factors that intrigue researchers. This research led to achievement of brilliant microwave-absorbing material by treating pampas as biomass. The carbon-based microfibers attained biowaste were treated plasma under diverse environments amplify their features. Moreover, pyrolysis scenario was performed compare results. reductive processes H2 carbonization. However, CO2 regulate heteroatoms defects. Interestingly, polystyrene (PS) applied matrix. aromatic rings existing in absorbing medium establish electrostatic interactions, elevating interfacial polarization, physical characteristics PS augment practical applications final product. manipulated biomasses characterized Raman, X-ray diffraction, energy-dispersive spectroscopy, field emission scanning electron microscopy, diffuse spectroscopy analyses. Eventually, features estimated vector network analyzer. plasma-treated H2/Ar blended with gained maximum RL −90.65 dB at 8.79 GHz an (RL ≤ −10 dB) 4.24 thickness 3.20 mm; meanwhile, treatment 97.99 14.92 7.74 2.05 mm thickness. Particularly, biomass plasmolyzed Ar covered entire X Ku bands 2.10 mm. Notably, total shielding efficiencies bioinspired materials up ≈99%, desirable for applications.

Language: Английский

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