Novel 3D network porous graphene nanoplatelets /Fe3O4/epoxy nanocomposites with enhanced electromagnetic interference shielding efficiency

Liu, Haijun; Liang, Caizhen; Chen, Jianjun; Huang, Y.; Cheng, Fei; Wen, Fubin; Xu, Bingbing; Wang, Bin

doi:10.1016/j.compscitech.2018.11.005

Cited by 68 publications

(37 citation statements)

References 22 publications

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“…This obtained percolation threshold is in a suitable range compared to other conductive nanocomposite foams [7,9,33,44]. This behavior has previously been ascribed to a decrease in the interparticle distances between the MWCNTs and to an increase of the MWCNT contacts and orientation due to the biaxial extensional stretching during the cells' growth [9,10,19]. EMI shielding can occur through three mechanisms: (1) reflection from the surface of the shield (SE R ) due to the impedance mismatch between the free space and the shield, (2) absorption as the wave goes through the shield (SE A ), and (3) multiple reflection (SE M ), which can happen due to the heterogeneity within the material (cell and nanoparticles).…”

Section: Resultssupporting

confidence: 53%

“…Among the initial studies, Yang et al [5] developed polystyrene foams obtaining shielding efficiencies (SE) around 20 dB with 15 wt.% and 7 wt.% carbon nanofibers and nanotubes, respectively. Subsequent works improved the SE or decreased the loading fractions required to achieve commercially attractive EMI shielding materials (around 20 dB in the X-band region (8.2-12.4 GHz)) and mostly looked at thermoplastic or rigid thermoset matrices or coated the foam surfaces with conductive nanofillers [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. These previous studies have demonstrated that the development of the cellular structure causes the redistribution of the nanoparticles, decreasing the average gap between the nanoparticles along the cell walls, thus enhancing the electrical conductivity and EMI shielding properties [9,14].…”

Section: Introductionmentioning

confidence: 99%

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Highly Deformable Porous Electromagnetic Wave Absorber Based on Ethylene–Propylene–Diene Monomer/Multiwall Carbon Nanotube Nanocomposites

et al. 2020

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The need for electromagnetic interference (EMI) shields has risen over the years as the result of our digitally and highly connected lifestyle. This work reports on the development of one such shield based on vulcanized rubber foams. Nanocomposites of ethylene–propylene–diene monomer (EPDM) rubber and multiwall carbon nanotubes (MWCNTs) were prepared via hot compression molding using a chemical blowing agent as foaming agent. MWCNTs accelerated the cure and led to high shear-thinning behavior, indicative of the formation of a 3D interconnected physical network. Foamed nanocomposites exhibited lower electrical percolation threshold than their solid counterparts. Above percolation, foamed nanocomposites displayed EMI absorption values of 28–45 dB in the frequency range of the X-band. The total EMI shielding efficiency of the foams was insignificantly affected by repeated bending with high recovery behavior. Our results highlight the potential of cross-linked EPDM/MWCNT foams as a lightweight EM wave absorber with high flexibility and deformability.

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Section: Resultssupporting

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Highly Deformable Porous Electromagnetic Wave Absorber Based on Ethylene–Propylene–Diene Monomer/Multiwall Carbon Nanotube Nanocomposites

et al. 2020

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“…With a thickness of 3–5 mm, the maximum shielding effectiveness of 37.6 dB was achieved within the X-band frequency range. Liu et al [ 142 ] synthesized 3D network porous graphene nanoplatelets (GNP) with Fe 3 O 4 and epoxy to form a shielding composite. With 7 wt.% loading of GNP and Fe 3 O 4 , 37.03 dB shielding effectiveness was achieved in the X-band 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 physical and structural characteristics of ferrites make them suitable for absorbing electromagnetic radiation of high frequencies. 1 Incorporation of high dielectric and/or magnetic nanoparticles along with carbon materials such as graphene, [2][3][4][5][6][7] Carbon nanotubes (CNTs), 8 carbon black 9 and carbon nanofiber [10][11][12][13][14][15][16] in various polymer matrices have produced functional shielding composites. The dielectric and magnetic nanoparticles generate electric and magnetic dipoles which interact with electrical and magnetic constituents of incident waves and results in effective absorption.…”

Section: Introductionmentioning

confidence: 99%

Graphene/Magnetite (Fe3O4) Hybrid Fillers for Thermoplastic Composites: X-Band Electromagnetic Interference Shielding Characteristics

Joseph

Sharma

Sahoo

et al. 2020

Journal of Elec Materi

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Hybrid composites of poly(methyl methacrylate) (PMMA) and polyvinyl chloride (PVC) with multilayered graphene/iron oxide (MLG/Fe 3 O 4 ) were prepared by solution casting. Tensile and viscoelastic characteristics of the hybrid nanocomposites were studied in comparison with the corresponding pure polymer and polymer/MLG composite. Increase in Fe 3 O 4 content in the hybrid composites reduces their electrical conductivity and thermal stability. The hybrid composite films were hot stacked to get a 2-mm-thick multilayered sandwich structure and tested for their X-band microwave absorption characteristics. The decrease in electrical conductivity resulted in lower overall shielding effectiveness of the hybrid composites. Hybrid composites with 2.5 wt.% Fe 3 O 4 exhibited satisfactory electromagnetic interference (EMI) shielding effectiveness at par with the polymer/MLG composites. The hybrid nanocomposites had a significantly higher influence of absorption in the overall shielding effectiveness when compared to the respective polymer/MLG composites. Both PMMA-based and PVC-based graphene/Fe 3 O 4 hybrid nanocomposites with proper filler contents are found suitable for EMI shielding solutions with higher absorption requirements.

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Novel 3D network porous graphene nanoplatelets /Fe3O4/epoxy nanocomposites with enhanced electromagnetic interference shielding efficiency

Cited by 68 publications

References 22 publications

Highly Deformable Porous Electromagnetic Wave Absorber Based on Ethylene–Propylene–Diene Monomer/Multiwall Carbon Nanotube Nanocomposites

Highly Deformable Porous Electromagnetic Wave Absorber Based on Ethylene–Propylene–Diene Monomer/Multiwall Carbon Nanotube Nanocomposites

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

Graphene/Magnetite (Fe3O4) Hybrid Fillers for Thermoplastic Composites: X-Band Electromagnetic Interference Shielding Characteristics

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