Superior electromagnetic interference shielding effectiveness and electro-mechanical properties of EMA-IRGO nanocomposites through the in-situ reduction of GO from melt blended EMA-GO composites

Bhawal, Poushali; Ganguly, Sayan; Das, Tushar Kanti; Mondal, Subhadip; Choudhury, Soumyadip; Das, Narayan Ch.

doi:10.1016/j.compositesb.2017.09.046

Cited by 94 publications

(62 citation statements)

References 104 publications

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“…Electrical conductivity plays the crucial role in attenuating electromagnetic radiations . Figure A demonstrates the total shielding efficiency of the composites in X‐ Band frequency region.…”

Section: Resultsmentioning

confidence: 99%

Superior electromagnetic interference shielding effectiveness and low percolation threshold through the preferential distribution of carbon black in the highly flexible polymer blend composites

et al. 2018

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Carbon black distribution in different phases of blends affects the percolation threshold and electrical properties and electromagnetic interferences (EMIs) shielding effectiveness to a great extent. We addressed the challenge of developing a light weight and highly flexible superior EMI shielding material by combining ethylene methyl acrylate (EMA) and ethylene octane copolymer (EOC) with conductive carbon black. The selective distribution of filler particle in the EMA phase facilitates the way for double percolation phenomenon which signifies higher electrical conductivity properties. This percolated filler network development is revealed from the field emission scanning electron microscopy and TEM analysis. This newly developed conductive blend demonstrates superior EMI shielding efficiency of −31.4 dB together with promising mechanical and thermal properties. POLYM. COMPOS., 40:1404–1418, 2019. © 2018 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Superior electromagnetic interference shielding effectiveness and low percolation threshold through the preferential distribution of carbon black in the highly flexible polymer blend composites

et al. 2018

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“…Carbonaceous nanofillers, owing to their excellent electrical conductivity, are considered as a suitable filler to develop flexible CPC to fulfill the modern electronic demands. Carbonaceous fillers such as carbon black (CB), graphite, graphene nanoplatelets (GNP), graphene oxide (GO), carbon nanotubes (CNT), and carbon nanofibers (CNF) are widely utilized as an effectual ingredient in designing lightweight CPC . Bao et al developed a highly conductive polymer composite by incorporating high surface area CB in polystyrene (PS) matrix .…”

Section: Introductionmentioning

confidence: 99%

“…High density polyethylene (HDPE)‐based highly conductive composite was fabricated by Weng et al using expanded graphite . Bhawal et al employed GO as a conductive filler in poly (ethylene‐co‐methyl acrylate) (EMA) matrix to develop flexible conductive composite . Saleh et al reported a high electrical conductivity of polyethylene (PE)/CNT composite at lower CNT content .…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of double percolated co‐supportive MWCNT‐CB conductive network for high‐performance EMI shielding application

Ravindren

Mondal

Nath

et al. 2019

Polymers for Advanced Techs

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The recent development in telecommunication technology has led electromagnetic interference (EMI) to a serious threat to both electronic devices and living beings. In this work, we designed a highly efficient EMI shielding material by taking advantage of both carbonaceous hybrid filler and double percolation phenomenon. Here, a flexible, lightweight microwave absorbing conductive polymer composite was fabricated by employing poly (ethylene‐co‐methyl acrylate) and ethylene octene copolymer (EMA/EOC) binary blend as the matrix and multiwall carbon nanotube carbon black (MWCNT/CB) hybrid filler as the conductive moiety. We investigated the effect of MWCNT content in the hybrid composite on mechanical, thermomechanical, electrical, and shielding efficiency. A total EMI shielding efficiency of −37.4 dB in the X band region was attained with 20 wt% hybrid filler containing 50 wt% MWCNT along with promising mechanical properties.

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“…Electromagnetic Interference (EMI) shielding efficiency (SE) is highest for suitable metal sheets. But to make the shield flexible and light, the world is innovating polymer composites as the 2nd generation group of EMI shielding materials . Moreover, polymers including plastics have now reduced the dominating role of metals and alloys in the world of practical materials.…”

Section: Introductionmentioning

confidence: 99%

Polymer Composites for Flexible Electromagnetic Shields

Sahu¹,

De²

2018

Macromolecular Symposia

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Harmful electromagnetic (EM) interference (EMI) to living beings and various sensitive instruments by EM radiations from electronic and electrical gadgets and mobile towers is increasing rapidly. It inflicts illness, and presumably cancerous growth in human cells. EMI is minimized by wrapping the receiver and/or the emitter gaplessly by an efficient EM shielding sheet. Compared to the widely used and classical metallic shields, 2nd generation polymer composite EMI shields are lighter and more flexible. Conventional polymer composites use conducting polymers and metallic/carbon powders that have conducting electrons to reflect EM waves away. A polymeric binder, curing overnight to a soft and flexible sheet, has presently been selected for making the polymeric composites. We test EM shielding by certain non‐metallic composites. We review results for composites with fine metallic fibers (copper and brass turnings, available as waste from mechanical workshops) or conducting forms of cadmium oxide or ferroelectric materials (PbNb2O6 [o‐PN] & BaTiO3 [BT]) or their mixtures (52 samples). Small pieces of these cloth‐like polymeric sheets have been characterized in a Vector Network Analyzer (VNA), by measuring input power (Pin), the reflected power (Prefl), and the transmitted power (Pout), over five frequency bands in 700 MHz to 40 GHz range to find Shielding Effectiveness (SE) = 10 log (Pout/Pin) and Reflection Effectiveness = 10 log (Prefl/Pin). Success of o‐PN, BT, conducting (fired) Cd‐O, metallic turnings and their combinations has been discussed, highlighting some new observations. Composites, developed in this work, include EMI Shielding materials and potential Radar Absorption Materials.

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Superior electromagnetic interference shielding effectiveness and electro-mechanical properties of EMA-IRGO nanocomposites through the in-situ reduction of GO from melt blended EMA-GO composites

Cited by 94 publications

References 104 publications

Superior electromagnetic interference shielding effectiveness and low percolation threshold through the preferential distribution of carbon black in the highly flexible polymer blend composites

Superior electromagnetic interference shielding effectiveness and low percolation threshold through the preferential distribution of carbon black in the highly flexible polymer blend composites

Synergistic effect of double percolated co‐supportive MWCNT‐CB conductive network for high‐performance EMI shielding application

Polymer Composites for Flexible Electromagnetic Shields

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