Mechanical and Electromagnetic Wave Absorption Performance of Carbonyl Iron Powder-Modified Nonwoven Materials

Gu, Wenyan; Shi, Jiang; Pang, Tianwen; Sun, Qilong; Jia, Qi; Hu, Jiajia; Zhang, Jiaqiao

doi:10.3390/ma16237403

Cited by 4 publications

(1 citation statement)

References 46 publications

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“…The shape, size, and interface interaction between the absorbent and the polymer will affect its dispersion in the matrix [ 25 , 26 , 27 , 28 , 29 , 30 ]. The method of dispersing the absorbent and its distribution in the foam will also impact the cell structure and absorbing performance [ 31 , 32 , 33 , 34 ]. Therefore, in this work, a wave-absorbing foam material composed of epoxy resin and acetylene carbon black (CB) was first prepared using in situ mechanical stirring and the three-roll milling method.…”

Section: Introductionmentioning

confidence: 99%

The Preparation and Performance of Epoxy/Acetylene Carbon Black Wave-Absorbing Foam

Liu,

Huang,

2024

Polymers

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The epoxy foam material filled with an absorbing agent effectively absorbs electromagnetic waves. In this study, epoxy resin was used as the matrix, and acetylene carbon black was used as the magnetic absorbing agent to prepare an absorbing foam material (epoxy/CB). The microstructure of acetylene carbon black (CB) and its distribution in epoxy resin, as well as the effects of pre-polymerization time and CB content on the foam structure, were systematically characterized. Additionally, two dispersion methods, the hot-melt in situ stirring dispersion method and the three-roll milling dispersion method, were studied for their effects on the foaming process and absorbing properties of epoxy/CB. The results showed that with the prolongation of pre-polymerization time, the pore size decreased from 1.02 mm to 0.4 mm, leading to a more uniform pore distribution. Compared to the hot-melt in situ stirring dispersion method, the three-roll milling dispersion method effectively improved the dispersion of CB in epoxy resin, reducing the aggregate size from 300–400 nm to 70–80 nm. The pore diameter also decreased from 0.453 mm to 0.311 mm, improving the uniformity of particle size distribution. However, the absorbing material prepared with the three-roll milling dispersion method exhibited unsatisfactory absorption performance, with values close to 0 dB at mid-low frequencies and around −1 dB at high frequencies. In contrast, the absorbing material prepared with the hot-melt in situ stirring dispersion method showed better absorption performance at high frequencies, reaching around −9 dB.

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Section: Introductionmentioning

confidence: 99%

The Preparation and Performance of Epoxy/Acetylene Carbon Black Wave-Absorbing Foam

Liu,

Huang,

2024

Polymers

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Study on microwave absorption performance of the skin‐core dual‐domain structure constructed with thin‐ply laminate and honeycomb

Liang,

Zhang,

Zhang

et al. 2024

Polymer Composites

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This study introduces an innovative approach to enhance the absorption capabilities of skin‐core dual‐domain structure radar‐absorbing materials (SDSRAM) composed of thin‐ply laminates and honeycomb. The upper skin laminates consist of transmissive skin and impedance matching layer. The impedance matching layer was hot‐pressed using functionalized absorbed thin‐ply glass fibers prepregs, flaked carbonyl iron powder (FCIP) and multi‐walled carbon nanotubes (MWCNTs) as the absorber. The lower skin was manufactured using carbon fiber‐plated nickel. The core is prepared by honeycomb modified (HCM). The permittivity and permeability of the skin laminates and the HCM were measured by wave‐guide method. The impact of FCIP/MWCNT on the electromagnetic (EM) parameters of the thin‐ply laminates and the influence of MWCNTs on the permittivity of the honeycomb were investigated. Microwave absorption properties of SDSRAM were assessed through the measurement of reflection loss (RL) using the arch method and simulated using the microwave simulation software CST studio suite 2020. Experimental verification was conducted to confirm the absorbing performance. The results show that the effective absorption bandwidth (RL < 10 dB) of SDSRAM covers the frequency range of 2.2–18 GHz, with a maximum absorption intensity of −42.5 dB. The introduction of the thin‐ply laminates caused a shift in the peak of the reflectance curve toward lower frequencies.Highlights Functionalized absorbed glass fibers were prepared using fiber spreading functional sizing integrated process. A new skin‐core dual‐domain synergistic modulation absorbed structure was developed with thin‐ply laminates and modified honeycomb. Its broadband absorption mechanism was discussed. Desired broadband absorption performance was acquired with thin thickness.

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Facile constructing core-shell F–CIP@O/N-SWCNHs composites for high-performance microwave absorption and anti-corrosion

Lu,

Xie,

Zhang

et al. 2024

Carbon

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Mechanical and Electromagnetic Wave Absorption Performance of Carbonyl Iron Powder-Modified Nonwoven Materials

Cited by 4 publications

References 46 publications

The Preparation and Performance of Epoxy/Acetylene Carbon Black Wave-Absorbing Foam

The Preparation and Performance of Epoxy/Acetylene Carbon Black Wave-Absorbing Foam

Study on microwave absorption performance of the skin‐core dual‐domain structure constructed with thin‐ply laminate and honeycomb

Facile constructing core-shell F–CIP@O/N-SWCNHs composites for high-performance microwave absorption and anti-corrosion

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