Heterostructured BN@Co‐C@C Endowing Polyester Composites Excellent Thermal Conductivity and Microwave Absorption at C Band

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(19)

Published: Jan. 9, 2024

Abstract The trends of miniaturization, lightweight, and high integration in electronics have brought serious issues heat dissipation electromagnetic compatibility also limited the simultaneous use thermally conductive microwave absorption materials. Therefore, it is imperative to design materials that possess those dual functions. In this work, one‐pot method used anchor zeolitic imidazolate framework ZIF‐67 coated with polydopamine (PDA) on boron nitride (BN) obtain BN@ZIF‐67@PDA. pyrolysis product BN@Co‐C@C as heterostructured conductive/microwave fillers blended polyethylene terephthalate (PET) prepare BN@Co‐C@C/PET composites. When mass ratio BN ZIF‐67@PDA 7.5:1 fraction 7.5 @Co‐C@C 45 wt%, @Co‐C@C/PET composites exhibit excellent thermal conductivities performances. conductivity coefficient 5.37 W m −1 K , which 35.8 times higher than PET (0.15 ), wt% (BN /Co‐C@C)/PET (4.03 ) prepared by directly mixing. minimum reflection loss are −63.1 dB at 4.72 GHz, corresponding effective bandwidth 1.28 GHz (4.08–5.36 GHz), achieving performance C band.

Language: Английский

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Broadband multispectral compatible absorbers for radar, infrared and visible stealth application

Progress in Materials Science, Journal Year: 2023, Volume and Issue: 135, P. 101088 - 101088

Published: Feb. 4, 2023

Language: Английский

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Rapid Gelation of Tough and Anti‐Swelling Hydrogels under Mild Conditions for Underwater Communication

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 33(1)

Published: Nov. 4, 2022

Abstract Swelling is ubiquitous for conventional hydrogels but not favorable many situations, especially underwater applications. In this study, an anti‐swelling and mechanically robust polyacrylic acid (PAAc)/gelatin composite hydrogel reported with a rapid gelation process (10 1 s) under mild conditions via the synergy of MXene‐activated initiation zirconium ion (Zr 4+ )‐induced cross‐linking, without requirement external energy input. The MXene found efficient to activate chain initiation, while Zr prone indispensable facilitating cross‐linking formed polymer chains. resulting exhibits integration exceptional properties high mechanical performance at room temperature, thanks dense hydrogen bonds between PAAc gelatin chains that enable upper critical solution temperature above temperature. Also, desirable electrical conductivity emerges in due simultaneous contribution , allowing stable signal output gel upon deformation underwater. As demonstration, communicator by harnessing as sensing module assembled, which capable wirelessly delivering messages decoder on ground Morse codes. This study provides exemplary way tough durable

Language: Английский

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Label-free electrochemical aptasensor based on gold nanoparticles/titanium carbide MXene for lead detection with its reduction peak as index signal

Advanced Composites and Hybrid Materials, Journal Year: 2023, Volume and Issue: 6(2)

Published: March 18, 2023

Language: Английский

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An overview of metal-organic frameworks and their magnetic composites for the removal of pollutants

Separation and Purification Technology, Journal Year: 2023, Volume and Issue: 320, P. 124144 - 124144

Published: May 24, 2023

As a result of serious pollution in the water environment, sewage disposal has been receiving lot attention from industry. Metal-organic frameworks (MOFs) attract interest adsorption and separation due to their complex structures easily adjustable pore sizes. Magnetic MOFs inheriting advantages both large surface area easy recovery have great potentials pollutants. This paper reviews recent research progress on ions, dyes other contaminants by different types (magnetic non-magnetic MOFs) magnetic composites (Fe3O4@MOF) aqueous environments. The factors affecting pollutants, thermodynamic kinetic effects are discussed with detailed examples. Finally, challenges opportunities for further development elucidated.

Language: Английский

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Multifunctional SiC aerogel reinforced with nanofibers and nanowires for high-efficiency electromagnetic wave absorption

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 467, P. 143518 - 143518

Published: May 16, 2023

Language: Английский

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High-conductivity nickel shells encapsulated wood-derived porous carbon for improved electromagnetic interference shielding

Carbon, Journal Year: 2023, Volume and Issue: 213, P. 118208 - 118208

Published: June 13, 2023

Language: Английский

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Multilevel structure carbon aerogels with 99.999 % electromagnetic wave absorptivity at 1.8 mm and efficient thermal stealth

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 452, P. 139110 - 139110

Published: Sept. 8, 2022

Language: Английский

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Adaptive and Adjustable MXene/Reduced Graphene Oxide Hybrid Aerogel Composites Integrated with Phase-Change Material and Thermochromic Coating for Synchronous Visible/Infrared Camouflages

ACS Nano, Journal Year: 2023, Volume and Issue: 17(7), P. 6875 - 6885

Published: March 30, 2023

Although single-function camouflage under infrared/visible bands has made great advances, it is still difficult for materials to cope with the synergy detection spanning both visible and infrared spectra adapt complex variable scenarios. Herein, a trilayer composite integrating thermal insulation, heat absorption, solar/electro-thermal conversions, thermochromism fabricated dual camouflages by combining anisotropic MXene/reduced graphene oxide hybrid aerogel n-octadecane phase change material in its bottom thermochromic coating on upper surface. Benefiting from synergetic heat-transfer suppression derived insulation of porous layer absorption phase-change layer, can serve as cloak hide target signatures images ambient surroundings during day jungle at night all scenes assist escaping visual surveillance virtue green appearance. For desert scenarios, spontaneously increase surface temperature via solar-thermal energy conversion, merging targets into high-temperature surroundings; meanwhile, vary color original yellow, enabling visually disappear sands hills. This work provides promising strategy designing adaptive adjustable integrated counter multiband complicated environments.

Language: Английский

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Research progress of MXenes and layered double hydroxides for supercapacitors

Inorganic Chemistry Frontiers, Journal Year: 2023, Volume and Issue: 10(15), P. 4358 - 4392

Published: Jan. 1, 2023

In this study, the preparation methods of MXenes and layered dihydroxides (LDHs) are reviewed. addition, electrochemical performances for supercapacitors MXene/LDHs composites summarized in detail.

Language: Английский

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