Electromagnetic Properties of Multifunctional Composites Based on Glass Fiber Prepreg and Ni/Carbon Fiber Veil

Silveira, Daniel Cônsoli; Gomes, Newton Adriano Santos; Rezende, Mirabel Cerqueira; Botelho, Edson Cocchieri

doi:10.5028/jatm.v9i2.657

Cited by 13 publications

(5 citation statements)

References 3 publications

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“…An innovative way to develop multifunctional composite materials is by developing interlayered composites that incorporate dissimilar architectures, mainly nonwoven CNF mats, woven carbon fibers (CF) fabrics, and CNT or CNF based buckypaper (BP) into polymer matrices using diverse fabrication methods. A wide variety of studies that focused on the electrical, mechanical, and electromagnetic interference shielding efficiency of interlayered composites have been reported [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. For instance, Xu et al [ 17 ] proposed a new method of depositing continuous CNT films onto CF fabrics using the floating catalyst chemical vapor deposition (FCCVD) method.…”

Section: Introductionmentioning

confidence: 99%

“…The increase in the number of BP conducting layers and dielectric material coupled with the architecture of the system increased the electromagnetic interference shielding effectiveness (EMI SE) from 45 dB to close to 100 dB. In another study, Silveira et al [ 24 ] developed multifunctional composites that were based on epoxy resin/glass fiber woven fabric prepregs and non-woven CF/Ni veils using compression molding. The developed laminated composites resulted in a high reflection of incident microwaves, being 91.4–100%.…”

Section: Introductionmentioning

confidence: 99%

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Electrical Properties and Electromagnetic Interference Shielding Effectiveness of Interlayered Systems Composed by Carbon Nanotube Filled Carbon Nanofiber Mats and Polymer Composites

et al. 2019

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The demand for multifunctional requirements in aerospace, military, automobile, sports, and energy applications has encouraged the investigation of new composite materials. This study focuses on the development of multiwall carbon nanotube (MWCNT) filled polypropylene composites and carbon nanofiber composite mats. The developed systems were then used to prepare interlayered composites that exhibited improved electrical conductivity and electromagnetic interference (EMI) shielding efficiency. MWCNT-carbon nanofiber composite mats were developed by centrifugally spinning mixtures of MWCNT suspended in aqueous poly(vinyl alcohol) solutions. The developed nanofibers were then dehydrated under sulfuric acid vapors and then heat treated. Interlayered samples were fabricated using a nanoreinforced polypropylene composite as a matrix and then filled with carbon fiber composite mats. The in-plane and through-plane electrical conductivity of an eight-layered flexible carbon composite (0.65 mm thick) were shown to be 6.1 and 3.0 × 10−2 S·cm−1, respectively. The EMI shielding effectiveness at 900 MHz increased from 17 dB for the one-layered composite to 52 dB for the eight-layered composite. It was found that the reflection of the electromagnetic waves was the dominating mechanism for EMI shielding in the developed materials. This study opens up new opportunities for the fabrication of novel lightweight materials that are to be used in communication systems.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrical Properties and Electromagnetic Interference Shielding Effectiveness of Interlayered Systems Composed by Carbon Nanotube Filled Carbon Nanofiber Mats and Polymer Composites

et al. 2019

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“…On the other hand, significant increase in electrical conductivity (the most likely due to reaching of percolation threshold) of CNT/ferrite composites hinders the utilization of the corresponding composites as efficient EMI absorber composite shields at low frequencies. Based on available literature sources and outlined facts it can be stated that the main mechanism of shielding of high electrically conductive materials, as also CNT/ferrite composites, is based on reflection of EMI, especially at low frequencies 30‐33 …”

Section: Resultsmentioning

confidence: 99%

Cross‐linking, mechanical, dynamical, and EMI absorption shielding effectiveness of NBR based composites filled with combination on ferrite and carbon based fillers

Kruželák

Kvasničáková

Bochkarev

et al. 2021

Polymers for Advanced Techs

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In the current study, manganese‐zinc ferrite in a concentration scale ranging from 100 to 500 phr was incorporated into acrylonitrile‐butadiene rubber having the constant amount of carbon black (20 phr) or carbon nanotubes (5 phr). The work was focused on the investigation of fillers combination on curing process, physical‐mechanical, and dynamic characteristics of composites. The electromagnetic interference absorption shielding efficiency of composites was subsequently investigated at low frequencies. The results revealed that composites filled with a combination of ferrite and CB are able to efficiently shield electromagnetic radiation in the tested frequency range 1 MHz to 3 GHz, while electromagnetic interference absorption shielding performance of CNT/ferrite composites was insufficient. The reason can be attributed to the outstanding increase of electrical conductivity of composites filled with combination of ferrite and CNT. As the best absorption shielding material can be considered the CB/ferrite composite containing 100 phr of ferrite, as it exhibited the widest absorption frequency bandwidth at return loss of −10 and −20 dB. The presence of ferrite in composites resulted in the decrease of cross‐link density, modification of curing characteristics and physical‐mechanical properties, and no significant influence on glass transition temperature.

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“…But some studies show that carbon fiber is less compatible for the parts of large MRI machines due to its severe radio frequency (RF) shading and some material heating due to RF coil. 59,60 Morris et al 61 studied NFRC with polystyrene core under mentioned environment and outperformed carbon fiber reinforced composites (CFRC) in RF shading and distortion in MRI. NFRC performed well in megavoltage imaging homogeneity and was superior to glass fiber-reinforced composite (GFRC).…”

Section: Introductionmentioning

confidence: 99%

Free vibration analysis of a skew sandwich plate with bamboo biocomposite and polylactic acid core under temperature and moisture conditions

Gawande,

Kattimani,

Murigendrappa

et al. 2023

Noise & Vibration Worldwide

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This article investigates the impact of moisture and temperature on vibration characteristics of bio-composite skew-laminated composite sandwich (SLCS) plates. The bio-composite SLCS plates with bamboo face sheets and polylactic acid (PLA) cores are biodegradable, radiolucent, lightweight, high strength, and withstand vibrations. The coupled thermo-elastic and hygro-elastic finite element (FE) model of the SLCS plate is derived using the higher-order shear deformation theory (HSDT). An initial stress stiffness matrix is developed using the nonlinear strain-displacement relations to incorporate the effect of temperature and moisture in FE modeling. Temperature and moisture-dependent material properties of bamboo fiber-reinforced biocomposite (BFB) and PLA core are employed for the analysis. A comprehensive investigation has been carried out to study the impact of moisture and temperature situations with different geometrical parameters and various skew angles on the frequency of the SLCS plate. The results indicate that the biocomposite sandwich material has excellent potential for structural applications under different environmental conditions in various applications like food processing, and biomedical applications, including MRI and CT scan beds.

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Electromagnetic Properties of Multifunctional Composites Based on Glass Fiber Prepreg and Ni/Carbon Fiber Veil

Cited by 13 publications

References 3 publications

Electrical Properties and Electromagnetic Interference Shielding Effectiveness of Interlayered Systems Composed by Carbon Nanotube Filled Carbon Nanofiber Mats and Polymer Composites

Electrical Properties and Electromagnetic Interference Shielding Effectiveness of Interlayered Systems Composed by Carbon Nanotube Filled Carbon Nanofiber Mats and Polymer Composites

Cross‐linking, mechanical, dynamical, and EMI absorption shielding effectiveness of NBR based composites filled with combination on ferrite and carbon based fillers

Free vibration analysis of a skew sandwich plate with bamboo biocomposite and polylactic acid core under temperature and moisture conditions

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