Electromagnetic Shielding of Composite Films Based on Graphite, Graphitized Carbon Black and Iron-Oxide

Khomenko, Volodymyr; Butenko, O. O.; Chernysh, Oksana; Barsukov, V.; Suchea, M.; Koudoumas, E.

doi:10.3390/coatings12050665

Cited by 11 publications

(5 citation statements)

References 25 publications

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“…Quantum confinement caused by the low-dimensional effect of two-dimensional (2D) materials makes them more prone to NPR [13][14][15][16]. Therefore, it is possible to find new 2D NPR materials for novel nanomaterial applications.…”

Section: Introductionmentioning

confidence: 99%

Single-Layer MoS2: A Two-Dimensional Material with Negative Poisson’s Ratio

et al. 2023

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Negative Poisson’s ratio (NPR) materials have broad applications such as heat dissipation, vibration damping, and energy absorption because of their designability, lightweight quality, and high strength ratio. Here, we use first-principles calculations to find a two-dimensional (2D) auxetic material (space group Rm), which exhibits a maximum in-plane NPR of −0.0846 and a relatively low Young’s modulus in the planar directions. Calculations show that the NPR is mainly related to its unique zigzag structure and the strong interaction between the 4d orbital of Mo and the 3p orbital of S. In addition, molecular dynamics (MD) simulations show that the structure of this material is thermodynamically stable. Our study reveals that this layered MoS2 can be a promising 2D NPR material for nanodevice applications.

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Section: Introductionmentioning

confidence: 99%

Single-Layer MoS2: A Two-Dimensional Material with Negative Poisson’s Ratio

et al. 2023

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“…Electrically conductive polymer composites have received great attention owing to their promising applications in many fields, [1][2][3] including antistatic materials, 4 electromagnetic interference shielding, 5,6 self-regulated heating materials, 7 and sensors. 8 Binary conductive polymer systems consisting of conducting fillers such as carbon black (CB), 9,10 graphite, 11,12 multi-walled carbon nanotubes (MWCNTs), [13][14][15] and carbon fibers 16,17 in a polymer matrix can create polymer composites that are tough and flexible with appropriate electrical conductivity based on their applications.…”

Section: Introductionmentioning

confidence: 99%

Glycerol-treated polypropylene/carbon black nanocomposites: Analysis of electrical, rheological, thermal and mechanical properties

Tabatabaee,

Hanifi,

Tavakkol

2023

Journal of Elastomers & Plastics

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Electrically conductive nanocomposites based on polypropylene (PP) were prepared using carbon black (CB) nanoparticles via melt blending in the presence of glycerol and castor oil as hydroxyl functional dispersing aids and maleic anhydride–grafted polypropylene (MAgPP) as a compatibilizer. Initially, electrical conductivity of PP/CB nanocomposites with different dosages of both CB nanoparticles and dispersing aids were investigated through electrical analysis. Results indicated that castor oil had no beneficial effects on electrical conductivity. However, the efficiency of 3 wt% loading of glycerol was verified through measurements of electrical, rheological, thermal and mechanical properties as well as by morphological studies. The volume electrical conductivity value of PP nanocomposites containing 12 wt% CB significantly enhanced to 1.2 × 10−4 S/cm by adding 3 wt% glycerol in compared with nanocomposite without glycerol with the volume conductivity value of 1.8 × 10−6 S/cm. Incorporation of optimum amount of glycerol favoured the dispersion of nanofiller in the matrix which was confirmed by scanning electron microscopy observations, leading to higher conductivity due to better formation of conductive pathways within the matrix. Additionally, at the same concentration of CB nanofiller, samples treated with 3 wt% glycerol showed higher melting temperatures, storage modulus ( Gˊ), complex viscosity, tensile modulus and elongation at break. These findings indicate that adding an optimum amount of an efficient hydroxyl functional component like glycerol into PP/CB nanocomposite can be a promising way to enhance the electrically conductive performance while other properties could be maintained well or even improved.

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“…In very recent and extensive reviews on this subject [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ], many nanomaterial-based potential solutions have been developed and tested for specific electromagnetic-shielding applications. Among these, different forms of carbon, such as graphene, carbon nanotubes, carbon fiber, carbon aerogels, carbon black, activated carbon, and carbon nanoparticles, as well as their hybrid composites, have been widely advanced and considered for EMI shielding in the GHz range [ 4 , 5 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 ]. The electrical and dielectric properties, as well as the shielding effectiveness of various polymer/graphene nanoplatelets (GNP) polymer/carbon black (CB) nanocomposites, were investigated recently [ 5 , 7 , 8 , 9 , 10 , 11 , 12 , 13 ], but multiple component formulations that can result in hybrid composites based on carbon-allotrope conductive fillers are not so frequent.…”

Section: Introductionmentioning

confidence: 99%

Carbon Allotropes-Based Paints and Their Composite Coatings for Electromagnetic Shielding Applications

et al. 2022

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The present manuscript reports on optimized formulations of alcohol-based conductive paints for electromagnetic interference shielding (EMI), which can ensure compatibility and reduce the visibility of electronic equipment, as a continuation of our previous work in this field, which examined water-based formulations for other applications. Graphite, carbon black, graphene, Fe3O4, Fe ore, and PEDOT:PSS in various ratios and combinations were employed in an alcohol base for developing homogeneous paint-like fluid mixtures that could be easily applied to surfaces with a paintbrush, leading to homogeneous, uniform, opaque layers, drying fast in the air at room temperature; these layers had a reasonably good electrical conductivity and, subsequently, an efficient EMI-shielding performance. Uniform, homogeneous and conductive layers with a thickness of over 1 mm without exfoliations and cracking were prepared with the developed paints, offering an attenuation of up to 50 dB of incoming GHz electromagnetic radiation. The structural and morphological characteristics of the paints, which were studied in detail, indicated that these are not simple physical mixtures of the ingredients but new composite materials. Finally, mechano-climatic and environmental tests on the coatings demonstrated their quality, since temperature, humidity and vibration stressors did not affect them; this result proves that these coatings are suitable for commercial products.

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Electromagnetic Shielding of Composite Films Based on Graphite, Graphitized Carbon Black and Iron-Oxide

Cited by 11 publications

References 25 publications

Single-Layer MoS2: A Two-Dimensional Material with Negative Poisson’s Ratio

Single-Layer MoS2: A Two-Dimensional Material with Negative Poisson’s Ratio

Glycerol-treated polypropylene/carbon black nanocomposites: Analysis of electrical, rheological, thermal and mechanical properties

Carbon Allotropes-Based Paints and Their Composite Coatings for Electromagnetic Shielding Applications

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