In situ formation of Fe3O4/N-doped carbon coating on the surface of carbon fiber with improved electromagnetic wave-absorption property

Sun, Qizhen; Ji, Yonghoon; He, Lifen; Long, Xiaoyun

doi:10.1039/d0ra06338j

Cited by 24 publications

(5 citation statements)

References 33 publications

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“…As is known to all, the absorption performance of the EM wave is closely related to the EM parameters: relative complex permittivity (ε r = ε′ – jε″) and relative complex permeability (μ r = μ′ – jμ″). The real part (ε′, μ′) of the relative permittivity and relative magnetic permeability is related to the storage capacity of electric energy and magnetic energy, while the imaginary part (ε″, μ″) of the relative permittivity and relative magnetic permeability represents the consumption of electric energy and magnetic energy. , Figure a,b shows the real part (ε′) and imaginary part (ε″) of relative complex permittivity and real parts (μ′) and imaginary parts (μ″) of complex permeability of CNP@PDA, CNP@GO, CNP@PDA@GO, and CNP@PDA@rGO nanocomposites in the frequency range of 2.0–18.0 GHz, respectively, which were investigated based on the coaxial method; the absorber model is shown in Figure d.…”

Section: Resultsmentioning

confidence: 77%

Boosted Interfacial Polarization from the Multidimensional Core–Shell–Flat Heterostructure CNP@PDA@GO/rGO for Enhanced Microwave Absorption

Zhou

Zhao

et al. 2021

Ind. Eng. Chem. Res.

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Heterogeneous structures have attracted extensive attention in the area of microwave absorption because they can promote interfacial polarization and thus enhance microwave absorption. Many efforts have been made in this field; however, challenges remain in terms of the absorber impedance matching and electromagnetic (EM) wave reflectivity. Herein, a multidimensional core−shell−flat heterostructure is proposed to build a kind of EM wave absorbers with both dielectric loss and magnetic loss. Polydopamine (PDA) is coated on the surface of nanoscale carbonyl nickel powder (CNP) to obtain the core−shell structure of CNP@PDA nanoparticles, and then, the CNP@PDA nanoparticles are grafted around graphene oxide (GO)/reduced GO (rGO) or sandwiched between the layers of GO/rGO to form a core−shell−flat heterostructure. Two-dimensional GO/rGO and three-dimensional PDA can modulate the impedance matching of nano-CNP and enhance the interfacial polarization of the absorber. The reflection loss of ternary CNP@PDA@GO/rGO is better than that of binary CNP@PDA or CNP@GO due to the interfacial polarization and multiple interfacial scattering of the heterostructure. The minimum reflection loss can reach −70.7 dB with a thickness of 2.5 mm, while the efficient absorption bandwidth (≤−10 dB) can achieve 8.5 GHz. The heterojunction contacts constructed by CNP−PDA and PDA−GO/rGO contribute to the enhanced polarization loss and interfacial reflection loss. The mechanism of excellent EM wave absorption is explained by enhanced interfacial polarization, interface scattering, and adjusted impedance matching. These results pave the way to fabricate high-performance EM wave absorption materials with a controlled multidimensional morphology and balanced impedance matching.

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Section: Resultsmentioning

confidence: 77%

Boosted Interfacial Polarization from the Multidimensional Core–Shell–Flat Heterostructure CNP@PDA@GO/rGO for Enhanced Microwave Absorption

Zhou

Zhao

et al. 2021

Ind. Eng. Chem. Res.

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“…As a new form of pollution, they have brought adverse effects on people's daily life and social development construction. [1][2][3][4] Moreover, advanced detection technologies, such as radar, infrared, have been widely used in the aerospace field in recent years, which also promotes researchers to develop and research electromagnetic wave adsorption (EMWA) materials. In the field of electromagnetic contamination protection and stealth detection technology, people have higher and higher requirements for EMWA materials with the continuous development of the material field, especially structural EMWA materials.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of porous polyimide fibers with electromagnetic wave absorption properties

Jiang

Lin

Jia

et al. 2022

Polymer Engineering & Sci

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The porous polyimide (PI) composite fibers, which exhibit high-efficiency electromagnetic wave adsorption (EMWA) performance, were successfully fabricated by controlling temperature of the coagulation bath during the wet spinning process. The mechanical properties of composite fiber decreased and average radius of micropores increased gradually with the rise of coagulation bath temperature. In addition, carbon nanotubes (CNTs) and nano-Fe 3 O 4 were introduced into the system by in situ polymerization. CNTs and nano-Fe 3 O 4 contribute to the attenuation of electromagnetic wave (EMW) through microwave absorption and reflection loss (RL), and the porous structure was able to provide multiple reflection paths for incident EMW and achieved higher attenuation. Particularly, when the temperature of coagulation bath was 50 C, the minimum RL (RL min ) value of the PI/CNTs/nano-Fe 3 O 4 (PI/C-Fe) composite fibers was demonstrated to be À54.61 dB with the matching thickness of 2.10 mm. The successful preparation of PI/C-Fe composite fiber in this study pointed out a new direction for the application of PI-based fiber materials in structural EMWA materials.

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“…For the past few years, nano‐EM wave‐absorbing materials have become the focus of research and development in the area of EM wave‐absorbing materials because of their advantages such as light weight, wide EM wave‐absorbing bandwidth, good compatibility, and thin thickness. [ 14 ] Among nano‐EM wave‐absorbing materials, CNTs are distinguished by their surface effect, small size effect, and macroscopic quantum tunneling effect. [ 15–18 ] At the same time, the special helical structure and chiral structure of carbon nanotubes (CNTs) make them have special electromagnetic effects.…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of polyimide/carbon nanotube composite films with electromagnetic wave absorption performance

Jiang

Lin

Jia

et al. 2021

Polymer Engineering & Sci

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The polyimide (PI)/carbon nanotube (CNT) films including 3,3′,4,4′‐biphenyl tetracarboxylic dianhydride (BPDA), p‐phenylenediamine (p‐PDA), and CNTs were prepared, which have prominent electromagnetic (EM) wave absorption performance. Experimental analyses of the mechanical properties, thermal stabilities, coefficient of thermal expansion (CTE), the glass transition temperature (Tg), and EM parameter revealed the beneficial effects of the CNTs on the resulting composite films. In particular, when the content of CNTs is 6 wt%, the film shows the highest EM wave absorption performance, which exhibits the effective absorption bandwidth of 2.72 GHz with the matching thickness of only 2.0 mm. These results indicate that PI‐based films have a certain potential application in the area of EM wave‐absorbing materials.

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In situ formation of Fe₃O₄/N-doped carbon coating on the surface of carbon fiber with improved electromagnetic wave-absorption property

Abstract: Carbon fiber is an absorbing material with high strength, acid and alkali resistance, high temperature resistance, flexibility, and processability and plays an important role in the electromagnetic (EM) wave absorption of civil buildings and military equipment.

Cited by 24 publications

References 33 publications

Boosted Interfacial Polarization from the Multidimensional Core–Shell–Flat Heterostructure CNP@PDA@GO/rGO for Enhanced Microwave Absorption

Boosted Interfacial Polarization from the Multidimensional Core–Shell–Flat Heterostructure CNP@PDA@GO/rGO for Enhanced Microwave Absorption

Preparation and characterization of porous polyimide fibers with electromagnetic wave absorption properties

Preparation and properties of polyimide/carbon nanotube composite films with electromagnetic wave absorption performance

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