Structural Design Strategies of Polymer Matrix Composites for Electromagnetic Interference Shielding: A Review

Nano-Micro Letters, Journal Year: 2021, Volume and Issue: 13(1)

Published: Aug. 18, 2021

Abstract With the widespread application of electronic communication technology, resulting electromagnetic radiation pollution has been significantly increased. Metal matrix interference (EMI) shielding materials have disadvantages such as high density, easy corrosion, difficult processing and price, etc. Polymer EMI composites possess light weight, corrosion resistance processing. However, current polymer present relatively low electrical conductivity poor performance. This review firstly discusses key concept, loss mechanism test method shielding. Then development status is summarized, research progress with different structures illustrated, especially for their preparation methods evaluation. Finally, corresponding scientific technical problems are proposed, trend also prospected. "Image missing"

Language: Английский

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Flexible Sandwich‐Structured Electromagnetic Interference Shielding Nanocomposite Films with Excellent Thermal Conductivities

Small, Journal Year: 2021, Volume and Issue: 17(42)

Published: Sept. 14, 2021

With the rapid development and popularization of smart, portable, wearable flexible electronic devices, urgent demands have been raised for electromagnetic interference (EMI) shielding films to solve related pollution problems. polyvinyl alcohol (PVA) as polymer matrix, sandwich-structured EMI nanocomposite are prepared via electrospinning-laying-hot pressing technology, where Fe3 O4 /PVA composite electrospun nanofibers in top bottom layers Ti3 C2 Tx middle layer. Owing electrospinning process successful construction sandwich structure, when amounts respectively only 13.3 26.7 wt%, effectiveness (EMI SE) reach 40 dB with thickness 75 µm, higher than that (Fe3 /Ti3 )/PVA (21 dB) based on blending-electrospinning-hot under same fillers. Furthermore, possess excellent thermal conductivities mechanical properties. This novel kind performances, conductivities, properties presents broad application prospects fields protection high-power, devices.

Language: Английский

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Janus (BNNS/ANF)-(AgNWs/ANF) thermal conductivity composite films with superior electromagnetic interference shielding and Joule heating performances

Nano Research, Journal Year: 2022, Volume and Issue: 15(5), P. 4747 - 4755

Published: Feb. 8, 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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Cellulose Nanopaper: Fabrication, Functionalization, and Applications

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

Published: April 13, 2022

Abstract Cellulose nanopaper has shown great potential in diverse fields including optoelectronic devices, food packaging, biomedical application, and so forth, owing to their various advantages such as good flexibility, tunable light transmittance, high thermal stability, low expansion coefficient, superior mechanical properties. Herein, recent progress on the fabrication applications of cellulose is summarized discussed based analyses latest studies. We begin with a brief introduction three types nanocellulose: nanocrystals, nanofibrils bacterial cellulose, recapitulating differences preparation Then, main methods filtration method casting well newly developed technology are systematically elaborated compared. Furthermore, advanced energy storage, electronic water treatment, high-performance packaging materials were highlighted. Finally, prospects ongoing challenges summarized.

Language: Английский

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Polymer‐based EMI shielding composites with 3D conductive networks: A mini‐review

SusMat, Journal Year: 2021, Volume and Issue: 1(3), P. 413 - 431

Published: July 19, 2021

Abstract High‐frequency electromagnetic waves and electronic products can bring great convenience to people's life, but lead a series of interference (EMI) problems, such as potential dangers the normal operation components human safety. Therefore, research EMI shielding materials has attracted extensive attention by scholars. Among them, polymer‐based with light weight, high specific strength, stable properties have become current mainstream. The construction 3D conductive networks proved be an effective method for preparation excellent effectiveness (SE). In this paper, mechanism is briefly introduced, emphasis on methods latest progress different networks. key scientific technical problems solved in field are also put forward. Finally, development trend application prospects prospected.

Language: Английский

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Multifunctional Ti3C2Tx-(Fe3O4/polyimide) composite films with Janus structure for outstanding electromagnetic interference shielding and superior visual thermal management

Nano Research, Journal Year: 2022, Volume and Issue: 15(6), P. 5601 - 5609

Published: April 18, 2022

Language: Английский

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Biomass-Derived Carbon Heterostructures Enable Environmentally Adaptive Wideband Electromagnetic Wave Absorbers

Nano-Micro Letters, Journal Year: 2021, Volume and Issue: 14(1)

Published: Dec. 4, 2021

Abstract Although advances in wireless technologies such as miniature and wearable electronics have improved the quality of our lives, ubiquitous use comes at expense increased exposure to electromagnetic (EM) radiation. Up date, extensive efforts been made develop high-performance EM absorbers based on synthetic materials. However, design an absorber with both exceptional dissipation ability good environmental adaptability remains a substantial challenge. Here, we report class carbon heterostructures via hierarchical assembly graphitized lignocellulose derived from bamboo. Specifically, assemblies nanofibers nanosheets behave nanometer-sized antenna, which results enhancement conductive loss. In addition, show that composition cellulose lignin precursor significantly influences shape formation covalent bonds, affect dielectric response-ability surface hydrophobicity (the apparent contact angle water can reach 135°). Finally, demonstrate obtained heterostructure maintains its wideband absorption effective frequency ranging 12.5 16.7 GHz under conditions simulate real-world environment, including rainwater slightly acidic/alkaline pH values. Overall, reported this work provide new principles for synthesis find practical applications environments.

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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Synthesis of NiCo-LDH/MXene hybrids with abundant heterojunction surfaces as a lightweight electromagnetic wave absorber

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 419, P. 130019 - 130019

Published: April 25, 2021

Language: Английский

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