3D Printed Integrated Gradient-Conductive MXene/CNT/Polyimide Aerogel Frames for Electromagnetic Interference Shielding with Ultra-Low Reflection

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Фев. 8, 2023

Construction of advanced electromagnetic interference (EMI) shielding materials with miniaturized, programmable structure and low reflection are promising but challenging. Herein, an integrated transition-metal carbides/carbon nanotube/polyimide (gradient-conductive MXene/CNT/PI, GCMCP) aerogel frame hierarchical porous gradient-conductivity has been constructed to achieve EMI ultra-low reflection. The gradient-conductive structures obtained by continuous 3D printing MXene/CNT/poly (amic acid) inks different CNT contents, where the slightly conductive top layer serves as EM absorption highly bottom layer. In addition, could extend dissipation path dissipate multiple reflections. Consequently, GCMCP frames exhibit excellent average efficiency (68.2 dB) (R = 0.23). Furthermore, miniaturized can be used gaskets effectively block wireless power transmission, which shows a prosperous application prospect in defense industry aerospace.

Язык: Английский

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Construction of Self-Assembly Based Tunable Absorber: Lightweight, Hydrophobic and Self-Cleaning Properties

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Май 28, 2023

Although multifunctional aerogels are expected to be used in applications such as portable electronic devices, it is still a great challenge confer multifunctionality while maintaining their inherent microstructure. Herein, simple method proposed prepare NiCo/C with excellent electromagnetic wave absorption properties, superhydrophobicity, and self-cleaning by water-induced NiCo-MOF self-assembly. Specifically, the impedance matching of three-dimensional (3D) structure interfacial polarization provided CoNi/C well defect-induced dipole primary contributors broadband absorption. As result, prepared have width 6.22 GHz at 1.9 mm. Due presence hydrophobic functional groups, improve stability humid environments obtain hydrophobicity large contact angles > 140°. This aerogel has promising absorption, resistance water or environments.

Язык: Английский

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Wood biomass-derived carbon for high-performance electromagnetic wave absorbing and shielding

Carbon, Год журнала: 2023, Номер 208, С. 255 - 276

Опубликована: Март 30, 2023

Язык: Английский

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Recent advances in construction strategies and multifunctional properties of flexible electromagnetic wave absorbing materials

Materials Research Bulletin, Год журнала: 2023, Номер 171, С. 112630 - 112630

Опубликована: Ноя. 22, 2023

Язык: Английский

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Fabrication of an Ultralight Ni-MOF-rGO Aerogel with Both Dielectric and Magnetic Performances for Enhanced Microwave Absorption: Microspheres with Hollow Structure Grow onto the GO Nanosheets

ACS Applied Materials & Interfaces, Год журнала: 2023, Номер 15(7), С. 9685 - 9696

Опубликована: Фев. 9, 2023

An ultralight Ni-MOF-rGO aerogel which possess the merits of not only broad bandwidth and strong absorption but also lightweight thin matching thickness is fabricated through a hydrothermal treatment, freeze-drying, annealing procedure. The Ni@C microspheres are dispersed randomly evenly on graphene oxide (GO) nanosheets, can be proved SEM TEM results. electromagnetic parameters composite adjusted by changing mass ratio MOF GO to endow material with both good impedance superior wave performances. Consequently, resulting shows outstanding microwave performance, achieves (−51.19 dB) effective (6.32 GHz) 1.9 mm while filling content 2 wt %. In addition, multiple loss mechanisms illustrated, including conduction loss, dipolar polarization, interfacial magnetic resonance, eddy current loss. word, extraordinary performance ascribed synergistic effects unique layered structure hollow core–shell microsphere. This work demonstrates that excellent promising strategy for application.

Язык: Английский

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Customizing the structure and chemical composition of ultralight carbon foams for superior microwave absorption performance

Carbon, Год журнала: 2023, Номер 206, С. 181 - 191

Опубликована: Фев. 17, 2023

Язык: Английский

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Absorption-Dominant mmWave EMI Shielding Films with Ultralow Reflection using Ferromagnetic Resonance Frequency Tunable M-Type Ferrites

Nano-Micro Letters, Год журнала: 2023, Номер 15(1)

Опубликована: Март 28, 2023

Although there is a high demand for absorption-dominant electromagnetic interference (EMI) shielding materials 5G millimeter-wave (mmWave) frequencies, most current are based on reflection-dominant conductive materials. While few proposed with magnetic materials, their working frequencies usually limited to under 30 GHz. In this study, novel multi-band EMI film M-type strontium ferrites and grid proposed. This shows ultralow reflection of less than 5% in multiple mmWave frequency bands sub-millimeter thicknesses, while more 99.9% EMI. The controllable by tuning the ferromagnetic resonance composite layer geometries. Two examples films one 39 52 GHz telecommunication other 60 77 autonomous radar bands, presented. remarkably low reflectance thinness provide an important advancement toward commercialization applications.

Язык: Английский

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Construction of hierarchical carbon fiber Aerogel@Hollow Co9S8 polyhedron for high-performance electromagnetic wave absorption at low-frequency

Chemical Engineering Journal, Год журнала: 2023, Номер 466, С. 143122 - 143122

Опубликована: Апрель 24, 2023

Язык: Английский

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Self-assembly of submillimeter porous structure on metal-organic framework to construct heterogeneous interface for controlling microwave absorption

Materials Today Physics, Год журнала: 2023, Номер 35, С. 101126 - 101126

Опубликована: Май 25, 2023

Язык: Английский

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Core-shell FeCo@carbon nanocages encapsulated in biomass-derived carbon aerogel: Architecture design and interface engineering of lightweight, anti-corrosion and superior microwave absorption

Journal of Colloid and Interface Science, Год журнала: 2023, Номер 646, С. 555 - 566

Опубликована: Май 18, 2023

Язык: Английский

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