Electrical Conductivity and Electromagnetic Shielding Effectiveness of Silicone Rubber Filled With Ferrite and Graphite Powders

Morari, Cristian; Balan, Ionut; Pintea, J.; Chiţanu, Elena; Iordache, I.

doi:10.2528/pierm11080406

Cited by 72 publications

(43 citation statements)

References 16 publications

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“…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. It is important to note that the EMI shielding performance of nanocomposites is mainly governed by the intrinsic properties of microwave active nanoparticles dispersed in it . Therefore, designing microwave active particles with a desired set of properties attract a great deal of research focus and significantly control the final performance of nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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

et al. 2017

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“…Attempts have been made to show that electrically conducting polymer composites containing copper, nickel‐coated carbon stainless‐steel, aluminum, carbon, and nanocomposites based on ICP as matrix, containing conducting fillers (e.g. metals, graphite, carbon black, carbon nanotubes, graphene), dielectric material like BaTiO 3 or magnetic materials like Fe 3 O 4 , γ‐Fe 2 O 3 , BaFe 12 O 19 ,‐ suppress electromagnetic noises.…”

Section: Electromagnetic Interference Shieldingmentioning

confidence: 99%

Smart Textile Fabrics for Screening Millimeter Wavelength Radiations: Challenges and Future Perspectives

2018

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The conductive fabrics are widely used in smart protective textile, specifically to shield millimeter wavelength radiations. In this context, intrinsically conducting polymers (ICPs) have gained enormous interest in the recent past due to their myriad applications in the field of textile specifically because of their tunable conductivity, lightweight, ease of coating etc. Numerous research studies have been focused to develop electromagnetic (EM) shielding fabric using ICPs and various functional conducting, magnetic and dielectric nanoparticles. The objective of this review article is to highlight the state‐of‐the‐art literature and recent developments in this field involving surface modification of textile fabrics using physical/chemical methods targeted towards EM shielding application. Furthermore, this review also provides useful insight in the shielding mechanism and diverse processes to design and develop smart EM shielded flexible fabrics as protective textiles.

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“…For instance, carbon-black and carbon-fiber filled ethylene-vinyl acetate copolymer and natural rubber were prepared [12], studying their potential applications for EMI shielding in both the microwave (100-2000 MHz) and X-band region (8)(9)(10)(11)(12). Similarly, composite materials made from silicone rubber with carbon powder and ferrite powder have been studied in microwaves and terahertz frequency ranges [13]. Several investigations were carried out for the estimation of shielding effectiveness and reflectivity of layered laminate structure made for combination of different materials.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Shielding Features in Lightweight PVDF-Aluminum Based Nanocomposites

Arranz-Andrés¹,

Pulido-González²,

Marı́n³

et al. 2013

PIER B

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Abstract-Dependence of the electromagnetic shielding effectiveness on filler volume fraction has been investigated from attenuation upon reflection measurements over a broad frequency range in hybrids based on Poly(vinylidene fluoride)-Aluminum nanoparticles. The loss of reflectivity with relation to the incident radiation in these nanocomposites compared with the pristine polymeric matrix shows the maximum value for the sample with an aluminum content of 10% in volume. Furthermore, the morphological aspects of all the specimens as well as their thermal properties, viscoelastic behavior and dielectric response have been evaluated. The nanocomposite that incorporates an Al content of 10% in volume exhibits the best balance in properties including, in addition to its shielding behavior, its processability and mechanical performance.

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Electrical Conductivity and Electromagnetic Shielding Effectiveness of Silicone Rubber Filled With Ferrite and Graphite Powders

Cited by 72 publications

References 16 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

Smart Textile Fabrics for Screening Millimeter Wavelength Radiations: Challenges and Future Perspectives

Electromagnetic Shielding Features in Lightweight PVDF-Aluminum Based Nanocomposites

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