Graphene aerogel films with expansion enhancement effect of high-performance electromagnetic interference shielding

Xi, Jiabin; Li, Youliang; Zhou, Erzhen; Liu, Yingjun; Gao, Weiwei; Guo, Yan; Ying, Jia; Chen, Zichen; Chen, Guogui

doi:10.1016/j.carbon.2018.04.041

Cited by 130 publications

(61 citation statements)

References 44 publications

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“…A multi-layer model and electromagnetic theories are applied to study the effect of air pores on EMI shielding performance of graphene lms. 28 As shown in Fig. 4d, it is assumed that graphene lms are composed of homogenous graphene laminates and insulated pores.…”

Section: Morphologies Of Graphene Lmsmentioning

confidence: 99%

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Ultrathin flexible graphene films with high thermal conductivity and excellent EMI shielding performance using large-sized graphene oxide flakes

Lin

Zhang

et al. 2019

RSC Adv.

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Section: Morphologies Of Graphene Lmsmentioning

confidence: 99%

“…13,21 By graphitization of GO lms at 3000 C, Xi et al has fabricated the foam-like graphene lms, with EMI SE up to 65-105 dB. 28 The ultrahigh EMI SEs of the foam-like graphene lms were attributed to signicantly improved electrical conductivity and "expansion enhancement effect" of insulating space layers.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin flexible graphene films with high thermal conductivity and excellent EMI shielding performance using large-sized graphene oxide flakes

Lin

Zhang

et al. 2019

RSC Adv.

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“…Kumar used in situ polymerization to coat PAN on nylon/lycra fabrics with a shielding value of 26 dB . The carbon material coating has higher shielding effectiveness . The EMSE value of the new carbon nanotube composite film synthesized is 65 dB by Lu et al …”

Section: Introductionmentioning

confidence: 99%

Silver‐plated polyamide fabrics with high electromagnetic shielding effectiveness performance prepared by in situ reduction of polydopamine and chemical silvering

et al. 2019

J of Applied Polymer Sci

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In this article, the silver-plated polyamide fabrics (SPPAFs) with high electroconductibility and shielding effectiveness were fabricated by using in situ reduction of polydopamine and chemical silvering. The effects of SPPAFs dopamine (C 8 H 11 O 2 N) and silver nitrate (AgNO 3 ) concentration on surface resistivity and electromagnetic interference shielding effectiveness were studied. The results showed that the surface resistivity of SPPAFs can reach a minimum value of 0.06 AE 0.014 Ω cm −1 , when C 8 H 11 O 2 N concentration is 4 g L −1 and the AgNO 3 concentration is 120 g L −1 . The shielding effectiveness of SPPAFs in the wide frequency range of 10-3000 MHz increases with the increase in the concentration of AgNO 3 , and increases first and stabilizes afterward with increasing C 8 H 11 O 2 N concentration. When the concentration of C 8 H 11 O 2 N and AgNO 3 is 3 and 120 g L −1 , respectively, mean shielding effectiveness values in the low-, medium-, and highfrequency bands are 71.3, 73.8, and 76.1 dB, respectively. Moreover, the mean shielding effectiveness values is 83.79 dB in the frequency range of 1.2-2.3 GHz. The dominant shielding mechanism of SPPAFs is the reflected electromagnetic waves and the absorption shielding effectiveness is less than 2 dB. The average electromagnetic shielding values of SPPAFs are above 67 dB after 16 weeks of storage, when C 8 H 11 O 2 N concentration is 4 g L −1 and the AgNO 3 concentration is 80 and 100 g L −1 . The prepared SPPAFs show promising applications in military textiles and smart wearable clothing.

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“…For the magnetic materials, the conclusion is totally reversed . Therefore, amounts of absorbing materials have a poor impedance and relatively narrow absorbing frequency range …”

Section: Introductionmentioning

confidence: 99%

Enhanced electromagnetic wave absorption of Fe‐doped silicon oxycarbide nanocomposites

Qian

et al. 2019

J Am Ceram Soc

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Polymer‐derived ceramics (PDCs), such as SiOC, SiCN, SiBCN, and SiC are considered the best candidates for designing high‐performance microwave absorber due to their controllable structure, homogeneous element composition at atom level, tunable electromagnetic and electrochemical properties. Herein, Fe ions doped silicon oxycarbide (Fe ions‐SiOC) ceramics have been successfully fabricated via solvothermal method. The electromagnetic absorption performances of the nanocomposites prove to be controllable via tailoring Fe ion contents. The Fe ions effectively enhance both the interfacial polarization of amorphous SiOC, and the dielectric properties of the nanocomposites but barely effect magnetic properties of the nanocomposite. As for 0.16 mol/L‐SiOC ceramics annealed at 1450°C, the effective absorption bandwidth as high as 2.00 GHz and reflection loss of −59.60 dB at 5.40 GHz with the thickness of 4.55 mm are obtained. Such work opens up a novel and simple route to scale up the PDC‐based materials with broadband and excellent microwave absorbing performances.

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Graphene aerogel films with expansion enhancement effect of high-performance electromagnetic interference shielding

Cited by 130 publications

References 44 publications

Ultrathin flexible graphene films with high thermal conductivity and excellent EMI shielding performance using large-sized graphene oxide flakes

Ultrathin flexible graphene films with high thermal conductivity and excellent EMI shielding performance using large-sized graphene oxide flakes

Silver‐plated polyamide fabrics with high electromagnetic shielding effectiveness performance prepared by in situ reduction of polydopamine and chemical silvering

Enhanced electromagnetic wave absorption of Fe‐doped silicon oxycarbide nanocomposites

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