Robust Solid–Solid Phase Change Coating Encapsulated Glass Fiber Fabric with Electromagnetic Interference Shielding for Thermal Management and Message Encryption

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

Published: Sept. 9, 2024

Abstract Electromagnetic interference (EMI) shielding composites with both thermal response/management functions and message transfer/encryption behavior are ideal for use in fields such as aerospace, construction engineering, military equipment. In this work, a self‐cross‐linking supramolecular solid–solid phase change polyethylene glycol (ScPEG) coating is prepared based on multiple hydrogen bonds, which used encapsulating glass fiber fabric (GFF) modified silver nanowires (AgNWs). The obtained through the hydrolysis‐condensation of PEG reactive silanol end group. Polyethylene molecular chains can store release heat by switching between crystalline amorphous state. groups form networks physical cross‐linking resulting an excellent stability. particular, bonds ScPEG AgNW‐modified GFF (A‐GFF) enhance interfacial interactions, robust structure enables efficient stress transfer. ScPEG‐coated A‐GFF achieve tensile strength up to 191 MPa tunable EMI effectiveness (SE) 40 72 dB depending number layers. Moreover, exhibits flexible response characteristic, outstanding management capability, potential encryption behavior.

Language: Английский

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Absorption‐Dominant Electromagnetic Interference (EMI) Shielding across Multiple mmWave Bands Using Conductive Patterned Magnetic Composite and Double‐Walled Carbon Nanotube Film

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(40)

Published: May 28, 2024

Abstract The revolution of millimeter‐wave (mmWave) technologies is prompting a need for absorption‐dominant EMI shielding materials. While conventional materials struggle in the mmWave spectrum due to their reflective nature, this study introduces novel film with ultralow reflection (<0.05 dB or 1.5%), ultrahigh absorption (>70 98.5%), and superior 99.99999%) across triple frequency bands thickness 400 µm. By integrating magnetic composite layer (MCL), conductive patterned grid (CPG), double‐walled carbon nanotube (DWCNTF), specific resonant frequencies electromagnetic waves are transmitted into minimized reflection, trapped dissipated between CPG DWCNTF. design factors frequencies, such as geometry MCL refractive index, systematically investigated based on wave propagation theories. This innovative approach presents promising solution effective materials, implications mobile communication, radar systems, wireless gigabit communication.

Language: Английский

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In-Situ Microfibrilization of Liquid Metal droplets in Polymer Matrix for Enhancing Electromagnetic Interference Shielding and Thermal Conductivity

Composites Science and Technology, Journal Year: 2024, Volume and Issue: 255, P. 110724 - 110724

Published: Aug. 1, 2024

Language: Английский

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Centrifugal Inertia‐Induced Directional Alignment of AgNW Network for Preparing Transparent Electromagnetic Interference Shielding Films with Joule Heating Ability

Advanced Science, Journal Year: 2024, Volume and Issue: 11(38)

Published: Aug. 8, 2024

Abstract Transparent electromagnetic interference (EMI) shielding is highly desired in specific visual scenes, but the challenge remains balancing their EMI effectiveness (SE) and optical transmittance. Herein, this study proposed a directionally aligned silver nanowire (AgNW) network construction strategy to address requirement of high SE satisfactory light transmittance using rotation spraying technique. The orientation distribution AgNW induced by centrifugal inertia force generated high‐speed rotating roller, which overcomes issue contact resistance random networks achieves conductivity even at low density. Thus, obtained transparent conductive film achieved 72.9% combined with sheet 4.5 Ω sq −1 desirable value 35.2 dB X band, 38.9 K‐band, highest 43.4 20.4 GHz. Simultaneously, excellent endowed outstanding Joule heating performance defogging/deicing ability, ensuring transparency windows when waves. Hence, research presents effective for constructing an network, offering promising solution enhancing optical‐electronic devices.

Language: Английский

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ELF/VLF Electromagnetic Interference Shielding by Low‐Dimensional Conductors Embedded in Insulating Polymer Matrices

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 16, 2025

Abstract The interaction of very low frequency (VLF) and extremely (ELF) electromagnetic waves with nanocomposites is rarely explored. It demonstrated that low‐dimensional electrically conducting fillers are able to shield long wavelengths, provided they form extended conduction paths through percolation. Other mechanisms synergistically augment the shielding high frequencies, such as skin effect, interfacial polarization, multiple internal scattering, have insignificant effects in low‐frequency range. In this regard, aspect ratio 1D conductors having lowest percolation thresholds provide best performance, both gravimetrically volumetrically. Shielding these materials observed majorly occur mostly reflection, hence, can be employed for guiding frequencies. correlation proposed estimate effectiveness based on conductivity enables convenient material design modulation.

Language: Английский

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A Porous Electrically and Thermally Conductive Composite Film for Heat Dissipation and Electromagnetic Interference Shielding

Composites Part B Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 112339 - 112339

Published: Feb. 1, 2025

Language: Английский

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Ultrathin-flexible multifunctional MXene composite hydrogels with good mechanical properties-high strain sensitivity and ultra-broadband EMI shielding performances

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 494, P. 153068 - 153068

Published: June 13, 2024

Language: Английский

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Quantum Confinement and End-Sealing Effects for Highly Sensitive and Stable Nitrogen Dioxide Detection: Homogeneous Integration of Ti₃C₂T_x-Based Flexible Gas Sensors

ACS Sensors, Journal Year: 2024, Volume and Issue: 9(9), P. 4578 - 4590

Published: Sept. 2, 2024

The real-time and room-temperature detection of nitrogen dioxide (NO

Language: Английский

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Supergravity‐Steered Generic Manufacturing of Nanosheets‐Embedded Nanocomposite Hydrogel with Highly Oriented, Heterogeneous Architecture

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(24)

Published: April 10, 2024

Abstract Designing nanocomposite hydrogels with oriented nanosheets has emerged as a promising toolkit to achieve preferential performances that go beyond their disordered counterparts. Although current fabrication strategies via electric/magnetic force fields have made remarkable achievements, they necessitate special properties of and suffer from an inferior orientation degree nanosheets. Herein, facile universal approach is discovered elaborate MXene‐based highly oriented, heterogeneous architecture by virtue supergravity replace conventional fields. The key such leverage bidirectional, force‐tunable attributes containing coupled orthogonal shear centrifugal field for steering high‐efficient movement, pre‐orientation, stacking MXene in the bottom. Such synergetic effect allows yielding high‐orientation MXene‐rich layer (orientation degree, f = 0.83) polymer‐rich layer. authors demonstrate high‐orientation, deliver extraordinary electromagnetic interference shielding effectiveness 55.2 dB at 12.4 GHz yet using super‐low 0.3 wt%, surpassing most hydrogels‐based materials. This versatile supergravity‐steered strategy can be further extended arbitrary including MoS 2 , GO, C 3 N 4 offering paradigm development nanocomposites.

Language: Английский

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Recent progress in the biomedical application of PEDOT:PSS hydrogels

Chinese Chemical Letters, Journal Year: 2024, Volume and Issue: 35(10), P. 109810 - 109810

Published: July 6, 2024

Language: Английский

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