High frequency millimetre wave absorbers derived from polymeric nanocomposites

Pawar, Shital Patangrao; Biswas, Sourav; Kar, Goutam Prasanna; Bose, Suryasarathi

doi:10.1016/j.polymer.2016.01.010

Cited by 199 publications

(143 citation statements)

References 186 publications

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“…To achieve high EMI shielding effectiveness, conducting MWNTs with high aspect ratio dispersed in the blend provided high electrical conductivity. In addition, literature survey over the last decade showed that such high aspect ratio carbonaceous nanoparticles are most effective also in attenuating EM radiation . Therefore, MWNTs was selected as the primary conducting filler to achieve impervious EMI shielding material.…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, in the case of metals, the primary mechanism of EM shielding is reflection leading to increased EM pollution in the environment . Therefore, ample amount of research has been concentrated on the development of materials with minimum reflection and maximum absorption of the incoming EM radiation . In this reference, owing to their exceptional microwave absorption ability coupled with flexibility, lightweight and easy processability, polymer based nanocomposites have gained great importance not only in the research field but also in the global market as EMI shielding material.…”

Section: Introductionmentioning

confidence: 99%

“…It is well‐established that highly conducting materials reflect EM radiation whereas materials possessing electric and magnetic dipoles leads to EM absorption . Therefore, incorporation of conducting as well as magnetic material leads to synergistic attenuation of EM radiation mainly through absorption . Recently, a large number of studies have been performed with nanocomposites containing conducting as well as magnetic particles .…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, incorporation of conducting as well as magnetic material leads to synergistic attenuation of EM radiation mainly through absorption . Recently, a large number of studies have been performed with nanocomposites containing conducting as well as magnetic particles . In this context, Qing et al .…”

Section: Introductionmentioning

confidence: 99%

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Graphene Derivatives Doped with Nickel Ferrite Nanoparticles as Excellent Microwave Absorbers in Soft Nanocomposites

et al. 2017

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Herein, we report the development of soft polymeric composites containing multiwall carbon nanotubes (MWNTs, 1–3 wt%) and graphene derivatives doped with nickel ferrite nanoparticles (rGO@NF, 10 wt%) as lightweight microwave absorbers. The soft nanocomposites were designed using melt‐mixed blends of varying compositions of PC (polycarbonate) and SAN (poly styrene acrylonitrile) by compartmentalized functional nanoparticles in one of the components of the blend (here PC). Maximum attenuation of the incoming electromagnetic (EM) radiation mainly through absorption was achieved. The hetero‐dielectric media at microscopic length scale in the PC component provided large interfaces which facilitated multiple scattering thereby attenuating the incoming EM radiation. This strategy of positioning the functional nanoparticles in one of the components in the blends resulted in significantly enhanced shielding effectiveness (SE), at any given concentration of MWNTs, in contrast to PC based composites. This enhancement in SE was realized in the special morphology of the bicomponent PC/SAN=60/40 wt% blends where both the components are continuous. The enhanced SE in co‐continuous blends is due to combined effect of enhanced electrical conductivity (more precisely due to interconnected network of the nanoparticles) and the presence of a hetero‐dielectric media generating large scattering interfaces. For instance, the PC/SAN (60/40 wt%) co‐continuous blend containing 3 wt% MWNTs and 10 wt% rGO@NF manifested in a total shielding effectiveness (SET) of −32.3 dB (i. e. more than 99.9 % attenuation of incoming EM radiation) mainly through absorption.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Graphene Derivatives Doped with Nickel Ferrite Nanoparticles as Excellent Microwave Absorbers in Soft Nanocomposites

et al. 2017

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“…In recent years, commercial, military, and scientific electronic devices and communication instruments which emit electromagnetic (EM) radiation at microwave and radio frequencies are widely used. The interference of EM radiations can disturb the routine performance or cause the complete failure of equipments . Thus, electromagnetic interference (EMI) shielding of radio frequency radiation is still a serious concern for modern society .…”

Section: Introductionmentioning

confidence: 99%

Highly conductive PP/PET polymer blends with high electromagnetic interference shielding performances in the presence of thermally reduced graphene nanosheets prepared through melt compounding

2018

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In this study, we have prepared highly conductive polypropylene (PP)/poly(ethylene terephthalate) (PET) blends with high electromagnetic interference (EMI) shielding performances by incorporating very low contents of thermally reduced graphene (TRG) through melt compounding method. Based on scanning electron microscopy and transmission electron microscopy images, the blends exhibited co‐continuous morphologies in which TRG nanosheets had been thermodynamically and kinetically driven into PET polymer resulting in a double percolated structure. Both direct current and AC electrical conductivities of the blend nanocomposites significantly increased with TRG addition and a dramatically low electrical percolation threshold of 0.08 vol% was achieved. Electromagnetic properties were investigated by measuring complex permittivity and complex permeability of the samples in the X‐band frequency range (8.2–12.4 GHz). The EMI shielding effectiveness considerably increased with increasing TRG loading and depending on the frequency, a shielding effectiveness of 40–60 dB was obtained with incorporation of only 2 vol% of TRG. POLYM. COMPOS., 40:E1461–E1469, 2019. © 2018 Society of Plastics Engineers

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Xavier

2022

Thermoplastic Polymer Composites

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High frequency millimetre wave absorbers derived from polymeric nanocomposites

Cited by 199 publications

References 186 publications

Graphene Derivatives Doped with Nickel Ferrite Nanoparticles as Excellent Microwave Absorbers in Soft Nanocomposites

Graphene Derivatives Doped with Nickel Ferrite Nanoparticles as Excellent Microwave Absorbers in Soft Nanocomposites

Highly conductive PP/PET polymer blends with high electromagnetic interference shielding performances in the presence of thermally reduced graphene nanosheets prepared through melt compounding

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