Effect of various dielectric and magnetic nanofillers on microwave absorption properties of carbon fiber reinforced composites structures

Ahmad, Hafiz Shehbaz; Hussain, Tanveer; Nawab, Yasir; Salamat, Shuaib

doi:10.1016/j.ceramint.2022.03.263

Cited by 12 publications

(6 citation statements)

References 31 publications

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“…This behavior has been reported to be the same for almost all carbon-doped composites. 17 , 45 , 47 , 52 − 54 The downward tendency of ε r ′ and ε r ″ can be assigned to the variation of polarization behavior with frequency. Polarization usually takes place with dipole, electronic, and ionic contributions.…”

Section: Resultsmentioning

confidence: 99%

Electromagnetic Interference Shielding Performances of Carbon-Fiber-Reinforced PA11/PLA Composites in the X-Band Frequency Range

2023

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To solve the problem of increasing electromagnetic pollution, it is crucial to develop electromagnetic interference (EMI) shielding materials. Using lightweight, inexpensive polymeric composites instead of currently used metal shielding materials is promising. Therefore, bio-based polyamide 11/poly(lactic acid) composites with various carbon fiber (CF) amounts were prepared using commercial extrusion and injection/compression molding methods. The prepared composites’ morphological, thermal, electrical conductivity, dielectric, and EMI shielding characteristics were investigated. The strong adhesion between the matrix and CF is confirmed by scanning electron microscopy. The addition of CF led to an increase in thermal stability. As CFs formed a conductive network in the matrix, direct current (DC) and alternative current (AC) conductivities of the matrix increased. Dielectric spectroscopy measurements showed an increase in the dielectric permittivity/energy-storage capability of the composites. Thus, the EMI shielding effectiveness (EMI SE) has also increased with the inclusion of CF. The EMI SE of the matrix increased to 15, 23, and 28 dB, respectively, with the addition of 10–20–30 wt % CF at 10 GHz, and these values are comparable or higher than other CF-reinforced polymer composites. Further analysis revealed that shielding was primarily accomplished by the reflection mechanism similar to the literature data. As a result, an EMI shielding material has been developed that can be used in commercially practical applications in the X-band region.

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Section: Resultsmentioning

confidence: 99%

Electromagnetic Interference Shielding Performances of Carbon-Fiber-Reinforced PA11/PLA Composites in the X-Band Frequency Range

2023

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“…In the future, researchers should continue to explore the advanced modification methods of CNTs, deeply study its absorption mechanism, and improve its synergistic effect with other components to make full use of the excellent properties of each component, thus preparing MAMs with excellent mechanical properties and strong microwave absorption effect. 89 and high strength, 90 but also possesses excellent electrical conductivity to produce strong dielectric loss to facilitate microwave absorption. 91 However, the electromagnetic waves incident on CF are almost all reflected out in use.…”

Section: Dielectric Loss Mamsmentioning

confidence: 99%

“…Carbon fiber (CF) has not only low density and high strength, but also possesses excellent electrical conductivity to produce strong dielectric loss to facilitate microwave absorption . However, the electromagnetic waves incident on CF are almost all reflected out in use .…”

Section: Research Progresses Of Mamsmentioning

confidence: 99%

High-Performance Microwave Absorption Materials: Theory, Fabrication, and Functionalization

Zuo,

Jia,

et al. 2023

Ind. Eng. Chem. Res.

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The rapid development of 5G communication technology has led to serious electromagnetic wave pollution, and as a result, it is urgent to develop high-performance microwave absorption materials (MAMs) conducive to reducing electromagnetic pollution, which has great use in both the military and civilian fields. In this review article, we first introduce the absorption theory of microwave absorption materials. Then, the recent research progress in microwave absorption materials categorized as dielectric loss MAMs, magnetic loss MAMs, and electromagnetic synergistic loss MAMs are profoundly reviewed according to absorption mechanism. Subsequently, we proceed to review recent achievements in combining wave absorption with other functions including hydrophobicity, infrared stealth, and selfhealing, aiming at developing advanced multifunctional MAMs adapted to various extreme environments during practical applications. Finally, the challenges are presented, and prospects for potential opportunities in this rapidly blossoming field are discussed accordingly. We hope this critical review is timely, which could provide guidance for those who are committed to designing absorbers with better fundamental understanding and practical application.

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“…The reflection and transmission at the microwave interface depend on the impedance matching at that interface, which is determined by the input impedance of the microwave absorber. Therefore, materials with high conductivity, dense structure, and thickness of microns or above generally have a strong reflection effect on microwaves . Meanwhile, making these materials into nanoscale particles or coatings is beneficial to improve impedance matching to enhance microwave absorption.…”

mentioning

confidence: 99%

“…Therefore, materials with high conductivity, dense structure, and thickness of microns or above generally have a strong reflection effect on microwaves. 1 Meanwhile, making these materials into nanoscale particles or coatings is beneficial to improve impedance matching to enhance microwave absorption. Therefore, nanoscale passive jamming media are widely used in the design of microwave absorption materials.…”

mentioning

confidence: 99%

Carbonized Kevlar Nanofiber/Carbon Nanotube/Magnetic Nanoparticle Hybrid Aerogel Fibers for Microwave Absorption

Yuan

Lyu

et al. 2023

ACS Appl. Nano Mater.

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Traditional passive jamming media always suffer from high density and impedance mismatch, which have restricted them from being directly utilized as microwave absorbing materials. Herein, carbonized Kevlar nanofiber/carbon nanotube/ magnetic nanoparticle (CKNF/CNT/MNP) hybrid aerogel fibers with low apparent density (0.12 g/cm 3 ) and adjustable electromagnetic parameters are fabricated for microwave absorption. The minimum reflection loss (RL min ) of the aerogel fibers reaches −59 dB at 14.8 GHz, and the effective absorption bandwidth (EAB) reaches the whole Ku-band with 1.8 mm thickness. In addition, the aerogel fibers can be further developed into microwave absorptive smoke, which exhibits a wide microwave absorption frequency (5.5−15.5 GHz).

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Effect of various dielectric and magnetic nanofillers on microwave absorption properties of carbon fiber reinforced composites structures

Cited by 12 publications

References 31 publications

Electromagnetic Interference Shielding Performances of Carbon-Fiber-Reinforced PA11/PLA Composites in the X-Band Frequency Range

Electromagnetic Interference Shielding Performances of Carbon-Fiber-Reinforced PA11/PLA Composites in the X-Band Frequency Range

High-Performance Microwave Absorption Materials: Theory, Fabrication, and Functionalization

Carbonized Kevlar Nanofiber/Carbon Nanotube/Magnetic Nanoparticle Hybrid Aerogel Fibers for Microwave Absorption

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