A simple strategy for flexible electromagnetic interference shielding: Hybrid rGO@CB-Reinforced polydimethylsiloxane

Anooja, J. B.; Dijith, Kesavapillai Sreedeviamma; Surendran, Kuzhichalil Peethambharan; Subodh, G.

doi:10.1016/j.jallcom.2019.151678

Cited by 39 publications

(19 citation statements)

References 38 publications

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“…Jeddi et al studied the EMI SE of composites based on silicone rubber and hybrid conducting filler constituted by graphite nanoplatelets and CB. [20] The EMI Se of poly-dimethylsiloxane loaded with reduced graphene oxide (rGO)/CB was also reported by Anooja et al [21] Song et al observed an increase of conductivity and an improvement of the EMI SE in the frequency range between 30 and 3000 Hz with the addition of CB in composite constituted by acrylonitrile-styrene-acrylate copolymer and graphite. [22] Recently, we reported a synergistic effect of carbon-based hybrid fillers constituted by CB and expanded graphite on the conductivity, EMI shielding effectiveness and absorbing properties of melt blended composites based on recycled PVDF.…”

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confidence: 56%

Hybrid carbonaceous materials for radar absorbing poly(vinylidene fluoride) composites with multilayered structures

et al. 2021

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Poly(vinylidene fluoride) (PVDF) based composites loaded with 3 wt% of carbon black (CB), graphite (GF), and the hybrid CB/GF (1.5/1.5 wt%) were prepared by melt mixing and tested as microwave absorbing material at X-band frequencies (8-12 GHz). The materials were processed and pressed at 220 C into plates of 20 × 20 × 0.1 cm 3. Dielectric and magnetic properties were evaluated using the wave-guide accessory to simulate the reflectivity of singlelayered PVDF composites through impedance matching behavior. The best absorbing properties were achieved with the composite loaded with the CB/GF hybrid material, whose maximum of radiation attenuation of −33 dB at 9.3 GHz was predicted with 4 mm thickness. Afterwards, the reflectivity of sandwiched structures (20 × 20 cm 2 in size) with one-layer honeycomb core sandwiched by two plates of PVDF composites was measured. The PVDF/HBhoneycomb-PVDF/HB structure reached reflection loss = −12 dB (E a = 94%) on a broadband frequency. CB/GF hybrid material in PVDF composites has a promising future as a lightweight and cost-effective microwave absorbing materials for both telecommunication and stealth technology.

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confidence: 56%

Hybrid carbonaceous materials for radar absorbing poly(vinylidene fluoride) composites with multilayered structures

et al. 2021

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“…The maximum EMI SE T value of the CNT/GNP/EUG composite is seen to be as high as ~42 dB, a value that meets the EMI shielding requirement for commercial products. Table 1 compares the results obtained in this work with other EMI shielding polymeric composites reported in previous work [17,18,20,28,[30][31][32]; it is seen that the CNT/GNP/EUG composites created in this work exhibit superior EMI SE T compared with previously studied composites. The results indicate that this work provides a practical and effective method for the preparation of high-performance EUG-based EMI shielding composites.…”

Section: Electrical Conductivity and Emi Shielding Properties Of The ...mentioning

confidence: 54%

“…Lin et al [ 25 ] developed CF/PP composites with an EMI SE of ~20 dB via adding 15 wt% CFs. Since both CNTs and graphene have exceptional mechanical, electric transport properties and extremely high aspect ratios, they make excellent conducting fillers in CPCs for EMI shielding applications [ 26 , 27 , 28 , 29 , 30 , 31 ]. Wu et al [ 32 ] prepared CNT/PP composites with an EMI SE of 43.1 dB by adding 5 wt% CNTs.…”

Section: Introductionmentioning

confidence: 99%

Bio-Based Eucommia ulmoides Gum Composites with High Electromagnetic Interference Shielding Performance

Kang

Luo

et al. 2022

Polymers

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Herein, high-performance electromagnetic interference (EMI) shielding bio-based composites were prepared by using EUG (Eucommia ulmoides gum) with a crystalline structure as the matrix and carbon nanotube (CNT)/graphene nanoplatelet (GNP) hybrids as the conductive fillers. The morphology of the CNT/GNP hybrids in the CNT/GNP/EUG composites showed the uniform distribution of CNTs and GNPs in EUG, forming a denser filler network, which afforded improved conductivity and EMI shielding effect compared with pure EUG. Accordingly, EMI shielding effectiveness values of the CNT/GNP/EUG composites reached 42 dB in the X-band frequency range, meeting the EMI shielding requirements for commercial products. Electromagnetic waves were mainly absorbed via conduction losses, multiple reflections from interfaces and interfacial dipole relaxation losses. Moreover, the CNT/GNP/EUG composites exhibited attractive mechanical properties and high thermal stability. The combination of excellent EMI shielding performance and attractive mechanical properties render the as-prepared CNT/GNP/EUG composites attractive candidates for various applications.

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“…[40] The shielding mechanism is a combination of the reflection of EMWs by electrically conductive shielding materials, where most of the electromagnetic field is reflected after interaction of the material with mobile charge carriers, the absorption of EMWs by the shielding material, where absorption of radiation occurs within the material followed by its interaction with electric and/or magnetic dipoles, and by multiple reflections of EMWs inside the material from scattering centers, defect sites, and interfaces in the composite of the shielding materials, which count toward total shielding effectiveness. [41] In other words, reflection is considered to be the result of impedance mismatch after the incident EM waves strike the material surface owing to the presence of mobile charges (electrons and holes) on the exterior. Absorption is caused by the loss of energy of EMWs or energy dissipation after ohmic and polarization losses.…”

Section: Mechanism Of Shieldingmentioning

confidence: 99%

“…[101] Copyright 2021, Elsevier Science Ltd A blend of carbon black and rGO in polydimethylsiloxane to form a hybrid rGO@CB-reinforced polydimethylsiloxane composite by solution mixing was reported for EMI shielding with a shielding effectiveness of 28 dB in the microwave frequency range (8-18 GHz). [41] This shows that a simple solution-mixing technique is sometimes unable to achieve excellent performance owing to the improper arrangement.…”

Section: F I G U R E 7 Graphical Representation Of the Fabrication Pr...mentioning

confidence: 99%

Electromagnetic interference cognizance and potential of advanced polymer composites toward electromagnetic interference shielding: A review

Devi

Ray

2022

Polymer Engineering & Sci

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The exigency of electromagnetic shielding is derived from the electromagnetic pollution caused by the widespread use of electronic devices. Electromagnetic waves from innumerable electrical sources radiate in the atmosphere and generate electromagnetic interference (EMI). Such EMI can interrupt other instruments and threaten human health. Therefore, future designs of electronic devices, regardless of their size and use, necessitate advanced electromagnetic shielding materials and techniques that can limit or completely block the transmission of electromagnetic waves in the atmosphere. The purpose of this review is to investigate the use of polymer-based composites for EMI shielding and study their configurations. The objectives of this study and the societal and environmental impacts of electromagnetic waves are discussed in detail.The available reports, the worldwide contribution by researchers in the field, the limitations of the available materials, and the inventions required have directed our interest toward this area of research. The review summarizes EMI shielding cognizance, current research gaps, and future recommendations.

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A simple strategy for flexible electromagnetic interference shielding: Hybrid rGO@CB-Reinforced polydimethylsiloxane

Cited by 39 publications

References 38 publications

Hybrid carbonaceous materials for radar absorbing poly(vinylidene fluoride) composites with multilayered structures

Hybrid carbonaceous materials for radar absorbing poly(vinylidene fluoride) composites with multilayered structures

Bio-Based Eucommia ulmoides Gum Composites with High Electromagnetic Interference Shielding Performance

Electromagnetic interference cognizance and potential of advanced polymer composites toward electromagnetic interference shielding: A review

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