Electromagnetic absorption materials: Current progress and new frontiers

Progress in Materials Science, Journal Year: 2022, Volume and Issue: 127, P. 100946 - 100946

Published: March 17, 2022

Language: Английский

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Vertically Aligned Silicon Carbide Nanowires/Boron Nitride Cellulose Aerogel Networks Enhanced Thermal Conductivity and Electromagnetic Absorbing of Epoxy Composites

Nano-Micro Letters, Journal Year: 2022, Volume and Issue: 14(1)

Published: April 30, 2022

Abstract With the innovation of microelectronics technology, heat dissipation problem inside device will face a severe test. In this work, cellulose aerogel (CA) with highly enhanced thermal conductivity (TC) in vertical planes was successfully obtained by constructing vertically aligned silicon carbide nanowires (SiC NWs)/boron nitride (BN) network via ice template-assisted strategy. The unique structure SiC NWs connected to BN ensures that TC composite direction reaches 2.21 W m −1 K at low hybrid filler loading 16.69 wt%, which increased 890% compared pure epoxy (EP). addition, relying on porous CA, EP-based also showed higher than other comparative samples horizontal direction. Meanwhile, exhibits good electrically insulating volume electrical resistivity about 2.35 × 10 11 Ω cm and displays excellent electromagnetic wave absorption performance minimum reflection loss − 21.5 dB wide effective bandwidth (< dB) from 8.8 11.6 GHz. Therefore, work provides new strategy for manufacturing polymer-based composites multifunctional performances microelectronic packaging applications.

Language: Английский

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Advances and mechanisms in polymer composites toward thermal conduction and electromagnetic wave absorption

Science Bulletin, Journal Year: 2023, Volume and Issue: 68(11), P. 1195 - 1212

Published: May 2, 2023

Language: Английский

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High-Efficiency Electromagnetic Interference Shielding of rGO@FeNi/Epoxy Composites with Regular Honeycomb Structures

Nano-Micro Letters, Journal Year: 2022, Volume and Issue: 14(1)

Published: Jan. 27, 2022

With the rapid development of fifth-generation mobile communication technology and wearable electronic devices, electromagnetic interference radiation pollution caused by waves have attracted worldwide attention. Therefore, design highly efficient EMI shielding materials are great importance. In this work, three-dimensional graphene oxide (GO) with regular honeycomb structure (GH) is firstly constructed sacrificial template freeze-drying methods. Then, amino functionalized FeNi alloy particles (f-FeNi) loaded on GH skeleton followed in-situ reduction to prepare rGH@FeNi aerogel. Finally, rGH@FeNi/epoxy composites obtained vacuum-assisted impregnation epoxy resin. Benefitting from construction synergistic effect, a low mass fraction 2.1 wt% (rGH f-FeNi 1.2 0.9 wt%, respectively) exhibit high effectiveness (EMI SE) 46 dB, which 5.8 times that (8 dB) for rGO/FeNi/epoxy same rGO/FeNi fraction. At time, also possess excellent thermal stability (heat-resistance index temperature at maximum decomposition rate 179.1 389.0 °C mechanical properties (storage modulus 8296.2 MPa).

Language: Английский

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Magnetic-dielectric synergy and interfacial engineering to design yolk–shell structured CoNi@void@C and CoNi@void@C@MoS2 nanocomposites with tunable and strong wideband microwave absorption

Nano Research, Journal Year: 2022, Volume and Issue: 15(7), P. 6761 - 6771

Published: May 13, 2022

Language: Английский

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Flame-retardant and leakage-proof phase change composites based on MXene/polyimide aerogels toward solar thermal energy harvesting

Advanced Composites and Hybrid Materials, Journal Year: 2022, Volume and Issue: 5(2), P. 1253 - 1267

Published: June 1, 2022

Language: Английский

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A Perspective for Developing Polymer-Based Electromagnetic Interference Shielding Composites

Nano-Micro Letters, Journal Year: 2022, Volume and Issue: 14(1)

Published: April 1, 2022

The rapid development of aerospace weapons and equipment, wireless base stations 5G communication technologies has put forward newer higher requirements for the comprehensive performances polymer-based electromagnetic interference (EMI) shielding composites. However, most currently prepared EMI composites are still difficult to combine high performance multi-functionality. In response this, based on research works relevant researchers as well our group, three possible directions break through above bottlenecks proposed, including construction efficient conductive networks, optimization multi-interfaces lightweight multifunction compatibility design. future trends in prospected, it is hoped provide certain theoretical basis technical guidance preparation,

Language: Английский

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Bioinspired, High-Strength, and Flexible MXene/Aramid Fiber for Electromagnetic Interference Shielding Papers with Joule Heating Performance

ACS Nano, Journal Year: 2022, Volume and Issue: 16(4), P. 6700 - 6711

Published: March 25, 2022

High-strength, flexible, and multifunctional characteristics are highly desirable for electromagnetic interference (EMI) shielding materials in the field of electric devices. In this work, inspired by natural nacre, we fabricated large-scale, layered MXene/amarid nanofiber (ANF) nanocomposite papers blade-coating process plus sol-gel conversion step. The as-synthesized possess excellent mechanical performance, that is, exceptional tensile strength (198.80 ± 5.35 MPa), large strain (15.30 1.01%), good flexibility (folded into various models without fracture), which ascribed to synergetic interactions interconnected three-dimensional network frame hydrogen bonds between MXene ANF. More importantly, with extensive continuous conductive paths formed nanosheets present a high EMI effectiveness 13188.2 dB cm2 g-1 frequency range 8.2-12.4 GHz. interestingly, show Joule heating performance fast thermal response (<10 s) low driving voltage (≤4 V). As such, large-scale MXene/ANF considered as promising alternatives wide applications management.

Language: Английский

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Multifunctional Thermally Conductive Composite Films Based on Fungal Tree‐like Heterostructured Silver Nanowires@Boron Nitride Nanosheets and Aramid Nanofibers

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 62(5)

Published: Nov. 22, 2022

Thermal conduction for electronic equipment has grown in importance light of the burgeoning 5G communication. It is imperatively desired to design highly thermally conductive fillers and polymer composite films with prominent Joule heating characteristics extensive mechanical properties. In this work, "solvothermal & situ growth" method carried out prepare "Fungal tree"-like hetero-structured silver nanowires@boron nitride nanosheet (AgNWs@BNNS) fillers. The AgNWs@BNNS/ANF are obtained by "suction filtration self-assembly hot-pressing". When mass fraction AgNWs@BNNS 50 wt%, film presents optimal thermal conductivity coefficient 9.44 W/(m ⋅ K) excellent tensile strength 136.6 MPa, good temperature-voltage response characteristics, superior electrical stability reliability, which promise a wide application potential devices.

Language: Английский

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Tunable Co/ZnO/C@MWCNTs based on carbon nanotube-coated MOF with excellent microwave absorption properties

Journal of Material Science and Technology, Journal Year: 2022, Volume and Issue: 127, P. 153 - 163

Published: April 21, 2022

Language: Английский

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