PPyNT/NR/NBR Composites with Excellent Microwave Absorbing Performance in X-Band

Yang, Huiru; Wang, Aiping; Feng, Xincong; Dong, Hao; Zhuang, Tao; Sui, Jing; Zhao, Shugao; Sun, Chong

doi:10.3390/polym15081866

Cited by 5 publications

(1 citation statement)

References 35 publications

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“…Doping carbon materials with ferromagnetic metal particles seems to solve this problem. By doping magnetic components into carbon-containing materials, composites can be created with higher magnetic losses, improved impedance matching, wide absorption bandwidth, and a high absorption intensity [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Nanocomposites Based on Pyrolyzed Polyacrylonitrile Doped with FeCoCr/C Transition Metal Alloy Nanoparticles: Synthesis, Structure, and Electromagnetic Properties

Zaporotskova,

Muratov,

Kozhitov

et al. 2023

Polymers

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In the last decade, the development of new materials that absorb electromagnetic radiation (EMR) has received research interest as they can significantly enhance the performance of electronic devices and prevent adverse effects caused by electromagnetic pollution. Electromagnetic radiation absorbers with a low weight and small thickness of the absorber layer, good absorption capacity, and a wide frequency response bandwidth are highly demanded. Here, for the first time, the properties of polymer nanocomposites FeCoCr/C synthesized by doping FeCoCr alloy nanoparticles into a polymer matrix of pyrolyzed polyacrylonitrile are investigated. An analysis of the magnetic properties of FeCoCr/C nanocomposites showed that increasing the synthesis temperature increased the specific magnetization and coercive force values of the FeCoCr/C nanocomposites. The dependence between the ratio of metals in the precursor of pyrolyzed polyacrylonitrile and the electromagnetic and wave-absorbing properties of FeCoCr/C nanocomposites is considered, and the results of complex dielectric and magnetic permeability measurements are analyzed. It is found that the most promising of all the studied materials are those obtained at T = 700 °C with the ratio of metals Fe:Co:Cr = 35:35:30.

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Section: Introductionmentioning

confidence: 99%

Nanocomposites Based on Pyrolyzed Polyacrylonitrile Doped with FeCoCr/C Transition Metal Alloy Nanoparticles: Synthesis, Structure, and Electromagnetic Properties

Zaporotskova,

Muratov,

Kozhitov

et al. 2023

Polymers

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Multi‐Interface Electromagnetic Wave Absorbing Material Based on Liquid Marble Microstructures Anchored to SEBS

Xiao,

Chen,

Shi

et al. 2024

Small

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The direct application of liquid marbles in electromagnetic wave (EMW) absorption is challenging due to their poor stability, susceptibility to gravitational collapse, and shaping difficulties. To address this issue, a novel strategy is proposed to incorporate liquid marble microstructures (NaCl/nano‐SiO2) encapsulated in organic phases (Octadecane) into the rubber‐matrix (SEBS) using the ultrasound‐assisted emulsion blending method. The resulting NaCl/SiO2/Octadecane microstructures anchored to SEBS offer a substantial solid–liquid interface consisting of NaCl solution and SiO2. When subjected to an alternating electromagnetic (EM) field, the water molecules and polysorbate within SiO2 exhibit heightened responsiveness to the EM field, and the movement of Na+ and Cl− within these microstructures leads to their accumulation at the solid–liquid interface, creating an asymmetric ion distribution. This phenomenon facilitates enhanced interfacial polarization, thereby contributing to the material's EMW absorption properties. Notably, the latex with 16 wt% SEBS (E‐3), exhibiting a surface morphology similar to human cell tissues, achieves complete absorption of X‐band (fE = 4.20 GHz, RLmin = −33.87 dB). Moreover, the latex demonstrates light density (0.78 g cm−3) and environmental stability. This study not only highlights the predominant loss mechanism in rubber‐based wave‐absorbing materials but also provides valuable insights into the design of multifunctional wave‐absorbing materials.

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Fabrication of hollow Fe3O4 microspheres encapsulated by single-walled carbon nanohorns for high-performance microwave absorption

Liu,

Zhang,

Gao

et al. 2024

Ceramics International

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PPyNT/NR/NBR Composites with Excellent Microwave Absorbing Performance in X-Band

Cited by 5 publications

References 35 publications

Nanocomposites Based on Pyrolyzed Polyacrylonitrile Doped with FeCoCr/C Transition Metal Alloy Nanoparticles: Synthesis, Structure, and Electromagnetic Properties

Nanocomposites Based on Pyrolyzed Polyacrylonitrile Doped with FeCoCr/C Transition Metal Alloy Nanoparticles: Synthesis, Structure, and Electromagnetic Properties

Multi‐Interface Electromagnetic Wave Absorbing Material Based on Liquid Marble Microstructures Anchored to SEBS

Fabrication of hollow Fe3O4 microspheres encapsulated by single-walled carbon nanohorns for high-performance microwave absorption

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