High temperature electromagnetic interference shielding of lightweight and flexible ZrC/SiC nanofiber mats

Hou, Yi; Cheng, Laifei; Zhang, Yani; Du, Xiaoqing; Zhao, Yijing; Yang, Zhihong

doi:10.1016/j.cej.2020.126521

Cited by 71 publications

(45 citation statements)

References 55 publications

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“…Further, in reported literature by other researchers, the Debye theory is generally utilized to clarify the relaxation process of dipoles [ 71 , 72 ]. According to the Debye theory for dielectric loss characteristics, the real permittivity (ε′) and imaginary permittivity (ε″) can be written as [ 73 ]:

…”

Section: Resultsmentioning

confidence: 99%

Superparamagnetic ZnFe2O4 Nanoparticles-Reduced Graphene Oxide-Polyurethane Resin Based Nanocomposites for Electromagnetic Interference Shielding Application

et al. 2021

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Superparamagnetic ZnFe2O4 spinel ferrite nanoparticles were prepared by the sonochemical synthesis method at different ultra-sonication times of 25 min (ZS25), 50 min (ZS50), and 100 min (ZS100). The structural properties of ZnFe2O4 spinel ferrite nanoparticles were controlled via sonochemical synthesis time. The average crystallite size increases from 3.0 nm to 4.0 nm with a rise of sonication time from 25 min to 100 min. The change of physical properties of ZnFe2O4 nanoparticles with the increase of sonication time was observed. The prepared ZnFe2O4 nanoparticles show superparamagnetic behavior. The prepared ZnFe2O4 nanoparticles (ZS25, ZS50, and ZS100) and reduced graphene oxide (RGO) were embedded in a polyurethane resin (PUR) matrix as a shield against electromagnetic pollution. The ultra-sonication method has been used for the preparation of nanocomposites. The total shielding effectiveness (SET) value for the prepared nanocomposites was studied at a thickness of 1 mm in the range of 8.2–12.4 GHz. The high attenuation constant (α) value of the prepared ZS100-RGO-PUR nanocomposite as compared with other samples recommended high absorption of electromagnetic waves. The existence of electric-magnetic nanofillers in the resin matrix delivered the inclusive acts of magnetic loss, dielectric loss, appropriate attenuation constant, and effective impedance matching. The synergistic effect of ZnFe2O4 and RGO in the PUR matrix led to high interfacial polarization and, consequently, significant absorption of the electromagnetic waves. The outcomes and methods also assure an inventive and competent approach to develop lightweight and flexible polyurethane resin matrix-based nanocomposites, consisting of superparamagnetic zinc ferrite nanoparticles and reduced graphene oxide as a shield against electromagnetic pollution.

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…”

Section: Resultsmentioning

confidence: 99%

Superparamagnetic ZnFe2O4 Nanoparticles-Reduced Graphene Oxide-Polyurethane Resin Based Nanocomposites for Electromagnetic Interference Shielding Application

et al. 2021

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“…The skin depth ( δ ) is the depth where the incident power of the EM waves fell to 1/e of its value at the surface. It can be given by the following relation [ 58 ]:

where f is the frequency, μ is the permeability of the material and σ is the electrical conductivity. Figure 15 b depicts the variation of skin depth ( δ ) of prepared MF20-RGO-PP, MF40-RGO-PP, MF60-RGO-PP and MF80-RGO-PP composite samples.…”

Section: Resultsmentioning

confidence: 99%

Excellent, Lightweight and Flexible Electromagnetic Interference Shielding Nanocomposites Based on Polypropylene with MnFe2O4 Spinel Ferrite Nanoparticles and Reduced Graphene Oxide

et al. 2020

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In this work, various tunable sized spinel ferrite MnFe2O4 nanoparticles (namely MF20, MF40, MF60 and MF80) with reduced graphene oxide (RGO) were embedded in a polypropylene (PP) matrix. The particle size and structural feature of magnetic filler MnFe2O4 nanoparticles were controlled by sonochemical synthesis time 20 min, 40 min, 60 min and 80 min. As a result, the electromagnetic interference shielding characteristics of developed nanocomposites MF20-RGO-PP, MF40-RGO-PP, MF60-RGO-PP and MF80-RGO-PP were also controlled by tuning of magnetic/dielectric loss. The maximum value of total shielding effectiveness (SET) was 71.3 dB for the MF80-RGO-PP nanocomposite sample with a thickness of 0.5 mm in the frequency range (8.2–12.4 GHz). This lightweight, flexible and thin nanocomposite sheet based on the appropriate size of MnFe2O4 nanoparticles with reduced graphene oxide demonstrates a high-performance advanced nanocomposite for cutting-edge electromagnetic interference shielding application.

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“…The unique properties of CNFs such as high surface area, extraordinary length, low density, high porosity, and thermo-mechanical properties [40,41] qualify them for many different applications. This chapter covers a review of their applications related to tissue engineering [35,36,[42][43][44][45][46][47], sensors [32-34, 48, 49], water remediation [50][51][52][53][54][55][56], batteries [57][58][59][60][61][62][63], catalyst supports/catalysts [64][65][66][67][68][69][70][71], electromagnetic interference (EMI) shielding [72][73][74][75][76][77][78][79], and thermal insulation materials [26,[79][80][81][82], etc. A list of the recent studies about ceramic nanofibers by electrospinning method is presented in Table…”

Section: Applications Of Ceramic Nanofibersmentioning

confidence: 99%

“…Moreover, the maximum effective absorption (<−10 dB) bandwidth (EAB) was approximately 4.1 GHz (12.6-16.7 GHz) with a 1.5 mm thickness, which could cover most of the Ku-band [73]. Hou et al [74] also fabricated flexible and lightweight ZrC/SiC hybrid nanofiber mats. When ZrC was added into SiC electrospinning solution, the viscosity decreased and the conductivity increased as a result of which the average diameter reduced from 2.6 μm to 330 nm, the specific BET surface area (SBET) increased from 51.5 to 131.1 m 2 g −1 and the electrical conductivity increased from 1.5 × 10 −6 to 1.3 × 10 −1 S cm −1 .…”

Section: Emi Shielding Applicationsmentioning

confidence: 99%

“…When ZrC was added into SiC electrospinning solution, the viscosity decreased and the conductivity increased as a result of which the average diameter reduced from 2.6 μm to 330 nm, the specific BET surface area (SBET) increased from 51.5 to 131.1 m 2 g −1 and the electrical conductivity increased from 1.5 × 10 −6 to 1.3 × 10 −1 S cm −1 . It is found that 3-layer ZrC/SiC nanofiber mats with a thickness of 1.8 mm showed EMI shielding effectiveness (SET) of 18.9 dB, which could be further improved to 20.1 dB at 600°C [74].…”

Section: Emi Shielding Applicationsmentioning

confidence: 99%

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Recent Advances in Applications of Ceramic Nanofibers

Kızıldağ¹

2021

Nanofibers - Synthesis, Properties and Applications

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Ceramic materials are well known for their hardness, inertness, superior mechanical and thermal properties, resistance against chemical erosion and corrosion. Ceramic nanofibers were first manufactured through a combination of electrospinning with sol–gel method in 2002. The electrospun ceramic nanofibers display unprecedented properties such as high surface area, length, thermo-mechanical properties, and hierarchically porous structure which make them candidates for a wide range of applications such as tissue engineering, sensors, water remediation, energy storage, electromagnetic shielding, thermal insulation materials, etc. This chapter focuses on the most recent advances in the applications of ceramic nanofibers.

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High temperature electromagnetic interference shielding of lightweight and flexible ZrC/SiC nanofiber mats

Cited by 71 publications

References 55 publications

Superparamagnetic ZnFe2O4 Nanoparticles-Reduced Graphene Oxide-Polyurethane Resin Based Nanocomposites for Electromagnetic Interference Shielding Application

Superparamagnetic ZnFe2O4 Nanoparticles-Reduced Graphene Oxide-Polyurethane Resin Based Nanocomposites for Electromagnetic Interference Shielding Application

Excellent, Lightweight and Flexible Electromagnetic Interference Shielding Nanocomposites Based on Polypropylene with MnFe2O4 Spinel Ferrite Nanoparticles and Reduced Graphene Oxide

Recent Advances in Applications of Ceramic Nanofibers

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