EMI and microwave absorbing efficiency of polyaniline-functionalized reduced graphene oxide/γ-Fe<sub>2</sub>O<sub>3</sub>/epoxy nanocomposite

Jaiswal, Rimpa; Agarwal, Kavita; Kumar, R. Mahesh; Kumar, Ritush; Mukhopadhyay, Kingsuk; Prasad, N. Eswara

doi:10.1039/d0sm00266f

Cited by 25 publications

(15 citation statements)

References 38 publications

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“…[8][9][10] The absorbing ability can be tailored through the change of specimen thickness. 9 The shielding effectiveness of NiZn-ferrite and MgZn-ferrite is better than that of MnZn-ferrite.…”

Section: Discussionmentioning

confidence: 99%

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Bonding microwave absorbing ferrites to thermal conducting copper

Chen

Tuan

2021

Int J Applied Ceramic Tech

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In the present study, the thermal characteristics of spinel ferrites are reported. The thermal expansion coefficient of ferrites is slightly larger than that of silicon; furthermore, these ferrites all demonstrate capability to absorb microwave. Nevertheless, their thermal conductivity is relatively low. A copper plate is bonded to ferrite to provide a backing for heat spreading. Microstructure observation at the interface reveals no reaction phase. The thermal resistance at the copper-ferrite interface is low. With the bonding of metallic copper, the heat generated in ferrites by microwave absorbing is possible to be removed by the backing copper layer.

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Section: Discussionmentioning

confidence: 99%

“…7 The absorbing capability of ferrites can be related to domain wall motion resonance and spin rotational relaxation. [6][7][8][9] The domain wall motion is strongly affected by the microstructure (grain size and porosity), the spin rotation by density. 7 With the increase of frequency, the spin rotation gains more influence on relaxation.…”

Section: Introductionmentioning

confidence: 99%

Bonding microwave absorbing ferrites to thermal conducting copper

Chen

Tuan

2021

Int J Applied Ceramic Tech

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“…The testing range was from 18–26 GHz where shielding effectiveness of 51.1 dB was achieved. Jaiswal et al [ 146 ] synthesized reduced graphene oxide and ferrite nanofiller with epoxy to form a shielding composite. While keeping the epoxy loading as 60 wt.%, a reflection loss of −10.26 dB was achieved with a 3 mm sample thickness in the 2–18 GHz frequency range.…”

Section: Polymer-based Compositesmentioning

confidence: 99%

Graphene and Iron Reinforced Polymer Composite Electromagnetic Shielding Applications: A Review

et al. 2021

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With advancements in the automated industry, electromagnetic inferences (EMI) have been increasing over time, causing major distress among the end-users and affecting electronic appliances. The issue is not new and major work has been done, but unfortunately, the issue has not been fully eliminated. Therefore, this review intends to evaluate the previous carried-out studies on electromagnetic shielding materials with the combination of Graphene@Iron, Graphene@Polymer, Iron@Polymer and Graphene@Iron@Polymer composites in X-band frequency range and above to deal with EMI. VOSviewer was also used to perform the keyword analysis which shows how the studies are interconnected. Based on the carried-out review it was observed that the most preferable materials to deal with EMI are polymer-based composites which showed remarkable results. It is because the polymers are flexible and provide better bonding with other materials. Polydimethylsiloxane (PDMS), polyaniline (PANI), polymethyl methacrylate (PMMA) and polyvinylidene fluoride (PVDF) are effective in the X-band frequency range, and PDMS, epoxy, PVDF and PANI provide good shielding effectiveness above the X-band frequency range. However, still, many new combinations need to be examined as mostly the shielding effectiveness was achieved within the X-band frequency range where much work is required in the higher frequency range.

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“…The porous configuration in CPCs improves the impedance matching between air and shields by introducing a large volume of air 34–36 . Functional fillers are distributed along the porous walls, causing multiple interfacial reflections and internal scattering to electromagnetic waves 37, 38 .…”

Section: Introductionmentioning

confidence: 99%

Porous polyamide 6/carbon black composite as an effective electromagnetic interference shield

Cai

Wang

Duan

et al. 2021

Polymer International

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Porous conductive polymer composites (CPCs) with functional additives are potential lightweight electromagnetic interference (EMI) materials. In this study, porous polyamide 6/carbon black (PA6/CB) composite was fabricated by a facile solution foaming strategy. When the content of CB was up to 20 wt%, a conductive network of CB was formed. The EMI shielding effectiveness (SE) of the prepared composites increased with CB fraction in the porous CPCs. When the content of CB reached 50 wt%, the values of SE reached 33.7–37.3 dB in the X band. This composite showed an EMI special SE of 221.97 dB cm3 g−1. The average absorptivity (A) coefficients of EMI reached 82.4% when the CB fraction was increased to 30 wt%. CPCs having a high fraction of inorganic CB showed an advantage in the reduction of non‐biodegradable plastics usage. The porous PA6/CB composite is a promising EMI material with an absorption‐dominated mechanism in the engineering field. © 2021 Society of Industrial Chemistry.

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EMI and microwave absorbing efficiency of polyaniline-functionalized reduced graphene oxide/γ-Fe₂O₃/epoxy nanocomposite

Abstract:
Polyaniline-decorated RGPF prepared by the solution mixing method in three different ratios (1 : 3, 1 : 1 and 3 : 1) of polyaniline-decorated reduced graphene oxide and ferrite have been studied for microwave absorption properties in defence application.

Cited by 25 publications

References 38 publications

Bonding microwave absorbing ferrites to thermal conducting copper

Bonding microwave absorbing ferrites to thermal conducting copper

Graphene and Iron Reinforced Polymer Composite Electromagnetic Shielding Applications: A Review

Porous polyamide 6/carbon black composite as an effective electromagnetic interference shield

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EMI and microwave absorbing efficiency of polyaniline-functionalized reduced graphene oxide/γ-Fe2O3/epoxy nanocomposite

Abstract: Polyaniline-decorated RGPF prepared by the solution mixing method in three different ratios (1 : 3, 1 : 1 and 3 : 1) of polyaniline-decorated reduced graphene oxide and ferrite have been studied for microwave absorption properties in defence application.

Cited by 25 publications

References 38 publications

Bonding microwave absorbing ferrites to thermal conducting copper

Bonding microwave absorbing ferrites to thermal conducting copper

Graphene and Iron Reinforced Polymer Composite Electromagnetic Shielding Applications: A Review

Porous polyamide 6/carbon black composite as an effective electromagnetic interference shield

Contact Info

Product

Resources

About

EMI and microwave absorbing efficiency of polyaniline-functionalized reduced graphene oxide/γ-Fe₂O₃/epoxy nanocomposite

Abstract:
Polyaniline-decorated RGPF prepared by the solution mixing method in three different ratios (1 : 3, 1 : 1 and 3 : 1) of polyaniline-decorated reduced graphene oxide and ferrite have been studied for microwave absorption properties in defence application.