Well-matched impedance of polypyrrole-loaded cotton non-woven fabric/polydimethylsiloxane composite for extraordinary microwave absorption

Shi, Yiyuan; Yu, Lujun; Li, Kan; Li, Shengze; Dong, Yubing; Zhu, Yaofeng; Meng, Fanbin

doi:10.1016/j.compscitech.2020.108246

Cited by 93 publications

(35 citation statements)

References 41 publications

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“…After comparing it with Figure a, it is found that the addition of PDMS has a particular influence on the absorbing effect of CeFe 2 O 4 /GO, but its absorbing effect does not have a significant impact. Because the proportion of PDMS in the composite is relatively low and the conductivity of pure PDMS is too low, the absorption effect of EM waves is basically 0 Figure b shows the 3D relationship diagram between the reflective loss of hybrid, frequency, and thickness.…”

Section: Resultsmentioning

confidence: 99%

CeFe₂O₄ Nanoparticle/Graphene Oxide Composites with Synergistic Superhydrophobicity and Microwave Absorption

Guo

Chen

et al. 2022

ACS Appl. Nano Mater.

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High-performance superhydrophobic electromagnetic (EM) wave-absorbing materials are critically significant for their practical application in harsh environments, especially in high-humidity conditions. Herein, a CeFe2O4/GO hybrid was successfully constructed via a facile hydrothermal method, which was then combined with polydimethylsiloxane (PDMS) to achieve the synergistic effect of outstanding EM wave absorption ability and superhydrophobicity. The structure and composition of the prepared hybrid were confirmed with the help of scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and thermogravimetric analysis. Meanwhile, a vector network analyzer was used for assessing the microwave absorbing performance of the fabricated composite. Eventually, the CeFe2O4/GO hybrid exhibited a minimum reflection loss (RL) of −57 dB at 15.2 GHz with an adequate absorption bandwidth of 5.2 GHz. Furthermore, the superhydrophobic PDMS/CeFe2O4/GO nanocomposite was synthesized using a facile mechanical mixing method, and the water contact angle of the nanocomposite with a ratio of 5:1 (CeFe2O4/GO/PDMS) could reach 164°. Simultaneously, the nanocomposite shows a stable EM wave absorption ability that the PDMS/CeFe2O4/GO achieved the minimum RL of −52 dB with an absorption bandwidth of 2.1 GHz. This work provides a feasible way to deal with the EM pollution in the outdoor environment, which may open up viable prospects for developing multifunctional microwave-absorbing materials.

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Section: Resultsmentioning

confidence: 99%

CeFe₂O₄ Nanoparticle/Graphene Oxide Composites with Synergistic Superhydrophobicity and Microwave Absorption

Guo

Chen

et al. 2022

ACS Appl. Nano Mater.

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“…The dielectric loss can be explained by the Debye medium theory. The Cole-Cole curve, which is the relationship of

and

, can be expressed as shown in the following Equation (5) [ 35 , 36 , 37 ]:

where

and

are the static dielectric constant and the optical dielectric constant, respectively. It can be seen from Equation (5) that the curves of

and

are a single semicircle, usually defined as a Cole-Cole semicircle, and each semicircle corresponds to one Debye relaxation process, while the appearance of the upward tail indicates that conductive loss contributes to the dielectric loss [ 38 ].…”

Section: Resultsmentioning

confidence: 99%

Microwave Absorption Properties of Carbon Black-Carbonyl Iron/Polylactic Acid Composite Filament for Fused Deposition Modeling

et al. 2022

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A single microwave absorbent and simple coating structure cannot meet the increasing requirements for broadband and strong absorption. Three-dimensional printing is an effective way to prepare multi-component complex structure metamaterial absorbers, and the key is to prepare raw materials with excellent absorption properties, suitable for 3D printing. In this paper, CB-CIP/PLA composite filament was prepared via a high-energy mixer and twin-screw extruder by compounding the dielectric loss material carbon black (CB) and the magnetic loss material carbonyl iron powder (CIP) with polylactic acid (PLA) as the matrix. The coaxial ring test piece was printed by FDM technology, and the microstructure of the composites was observed and analyzed by SEM. Meanwhile, the electromagnetic parameters of the composites were examined by a vector network analyzer, mainly studying the influence of the CB and CIP content and thickness on the microwave absorbing properties of the composite material. The results show that when the CB content is 20% and the CIP content is 30%, the CB-CIP/PLA composite has excellent microwave absorption and broad bandwidth. When the matching thickness is 1.6 mm, the minimum reflection loss (RL) reaches −51.10 dB; when the thickness is 1.7 mm, the effective absorption bandwidth (RL < −10 dB) is 5.04 GHz (12.96–18 GHz), nearly covering the whole Ku band. This work provides an efficient formulation and process to prepare an absorbing composite filament for FDM.

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“…The conductivities of the samples are also compared in Figure S2 , illustrating obvious correlations with the value of permittivity. Actually, the dielectric loss of HCl-Ppy is mainly due to conductivity loss [ 43 ], while the dielectric loss of PDA/Ppy/ND should correlate to the polarization relaxation loss and interfacial relaxation loss [ 44 ] generated from the asymmetric polar hybridizations as well as the ternary interfaces [ 45 ], according to the above structural results. On the other hand, the values of real permeability (μ′) ( Figure 4 c) and imaginary permeability (μ″) ( Figure 4 d) were all close to that of air, indicating that there were almost no magnetic responses for all three samples.…”

Section: Resultsmentioning

confidence: 99%

Design of Flexible Film-Forming Polydopamine/Polypyrrole/Nanodiamond Hierarchical Structure for Broadband Microwave Absorption

et al. 2022

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Microwave-absorbing materials are widely used in numerous fields, including the military, daily protection, etc. Currently, in addition to being lightweight and highly efficient, good film-forming processing characteristics and environmental stability are also required for the practical application of microwave-absorbing materials, which, in general, are difficult to make compatible. In this paper, a mulberry-like PDA/PPy/ND hierarchical structure was prepared by in situ polymerization. The hierarchical structure showed remarkably enhanced microwave absorption, as well as better flexible film-forming characteristics, thanks to the multiple roles PDA played in the system. The optimal RL peak for PDA/PPy/ND could reach −43.6 dB at 7.58 GHz, which is mainly attributed to the multiple dielectric loss paths and significantly improved impedance-matching characteristics. Furthermore, given the H-bond crosslink, the introduction of PDA also promoted the film formation and dispersion of PDA/PPy/ND in the PVA matrix, forming a water-resistant and flexible film. This work provides a referencing path for the design and practical applications of lightweight microwave-absorbing materials.

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Well-matched impedance of polypyrrole-loaded cotton non-woven fabric/polydimethylsiloxane composite for extraordinary microwave absorption

Cited by 93 publications

References 41 publications

CeFe₂O₄ Nanoparticle/Graphene Oxide Composites with Synergistic Superhydrophobicity and Microwave Absorption

CeFe₂O₄ Nanoparticle/Graphene Oxide Composites with Synergistic Superhydrophobicity and Microwave Absorption

Microwave Absorption Properties of Carbon Black-Carbonyl Iron/Polylactic Acid Composite Filament for Fused Deposition Modeling

Design of Flexible Film-Forming Polydopamine/Polypyrrole/Nanodiamond Hierarchical Structure for Broadband Microwave Absorption

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Well-matched impedance of polypyrrole-loaded cotton non-woven fabric/polydimethylsiloxane composite for extraordinary microwave absorption

Cited by 93 publications

References 41 publications

CeFe2O4 Nanoparticle/Graphene Oxide Composites with Synergistic Superhydrophobicity and Microwave Absorption

CeFe2O4 Nanoparticle/Graphene Oxide Composites with Synergistic Superhydrophobicity and Microwave Absorption

Microwave Absorption Properties of Carbon Black-Carbonyl Iron/Polylactic Acid Composite Filament for Fused Deposition Modeling

Design of Flexible Film-Forming Polydopamine/Polypyrrole/Nanodiamond Hierarchical Structure for Broadband Microwave Absorption

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Product

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CeFe₂O₄ Nanoparticle/Graphene Oxide Composites with Synergistic Superhydrophobicity and Microwave Absorption

CeFe₂O₄ Nanoparticle/Graphene Oxide Composites with Synergistic Superhydrophobicity and Microwave Absorption