0000000000248659

AUTHOR

E. Stefanutti

showing 4 related works from this author

DIELECTRIC PROPERTIES OF EPOXY RESIN COMPOSITES FILLED WITH NANOCARBON INCLUSIONS

2013

The epoxy resin composites with various carbon additives were investigated in the frequency range of 20 Hz - 3 GHz at temperatures from room to 500 K. The dielectric properties were found to be strongly impacted by percolation threshold. The lowest percolation threshold (< 0.25 wt.%), was observed in composites with single-walled carbon nanotubes.

NanocompositeSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiMaterials sciencevisual_artvisual_art.visual_art_mediumEpoxyDielectricComposite materialSettore CHIM/02 - Chimica FisicaPhysics, Chemistry and Applications of Nanostructures
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Electromagnetic shielding efficiency in Ka-band: carbon foam versus epoxy/carbon nanotube composites

2012

The wide application of microwaves stimulates searching for new materials with high electrical conductivity and electromagnetic (EM) interference shielding effectiveness (SE). We conducted a comparative study of EM SE in K a -band demonstrated by ultra-light micro-structural porous carbon solids (carbon foams) of different bulk densities, 0.042 to 0.150  g/cm 3 , and conventional flexible epoxy resin filled with carbon nanotubes (CNTs) in small concentrations, 1.5 wt.%. Microwave probing of carbon foams showed that the transmission through a 2 mm-thick layer strongly decreases with decreasing the pore size up to the level of 0.6%, due to a rise of reflectance ability. At the same time, 1 mm…

Materials scienceCarbon nanofoamchemistry.chemical_elementmicrowaves.Carbon nanotubeepoxy resinlaw.inventionElectrical resistivity and conductivitylawcompositecarbon nanotubeComposite materialchemistry.chemical_classificationshieldingSettore CHIM/05 - Scienza E Tecnologia Dei Materiali PolimericiEpoxyPolymerCondensed Matter PhysicsElectronic Optical and Magnetic Materialschemistryvisual_artElectromagnetic shieldingvisual_art.visual_art_mediumcarbon foamCarbonMicrowaveJournal of Nanophotonics
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Epoxy Resin/Carbon Black Composites Below the Percolation Threshold

2013

International audience; A set of epoxy resin composites filled with 0.25-2.0 wt.% of commercially available ENSACO carbon black (CB) of high and low surface area (CBH and CBL respectively) has been produced. The results of broadband dielectric spectroscopy of manufactured CB/epoxy below the percolation threshold in broad temperature (200 K to 450 K) and frequency (20 Hz to 1 MHz) ranges are reported. The dielectric properties of composites below the percolation threshold are mostly determined by alpha relaxation in pure polymer matrix. The glass transition temperature for CB/epoxy decreases in comparison with neat epoxy resin due to the extra free volume at the polymer-filler interface. At …

Materials scienceBiomedical EngineeringBioengineering02 engineering and technologyDielectric01 natural sciences[SPI.MAT]Engineering Sciences [physics]/MaterialsElectrical resistivity and conductivity0103 physical sciences[SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph]General Materials ScienceComposite materialSettore CHIM/02 - Chimica Fisica010302 applied physicschemistry.chemical_classification[SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph]Percolation thresholdGeneral ChemistryCarbon blackPolymerEpoxy[CHIM.MATE]Chemical Sciences/Material chemistry021001 nanoscience & nanotechnologyCondensed Matter Physics[SPI.ELEC]Engineering Sciences [physics]/ElectromagnetismSettore ING-IND/22 - Scienza E Tecnologia Dei Materiali[CHIM.POLY]Chemical Sciences/PolymerschemistryNanocomposite Carbon black Percolation threshold electrical propertiesvisual_artvisual_art.visual_art_mediumAntistatic agent[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci][SPI.MECA.THER]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Thermics [physics.class-ph]0210 nano-technologyGlass transition
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Nanomechanical Properties of Epoxy Composites with Carbon Fillers

2013

The key point of this study is investigation of nanomechanical properties of epoxy-based nanocomposites filled with different kinds of carbon nanofillers like exfoliated graphite, high surface-area carbon black, single-walled carbon nanotubes and multi-walled carbon nanotubes

Materials scienceSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialichemistryNanocomposite Nanomechanicsvisual_artvisual_art.visual_art_mediumchemistry.chemical_elementEpoxyComposite materialCarbonSettore CHIM/02 - Chimica Fisica
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