| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Silva, J.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (40/40 displayed)
- 2023Designing of carbon fiber-reinforced polymer (CFRP) composites for a second-life in the aeronautic industry: strategies towards a more sustainable futurecitations
- 20233D printed magneto-active microfiber scaffolds for remote stimulation and guided organization of 3D In vitro skeletal muscle modelscitations
- 2023Infiltration of aluminum in 3D-printed metallic inserts
- 2022Editorial
- 2022Improvements in the Microstructure and Mechanical Properties of Aluminium Alloys Using Ultrasonic-Assisted Laser Weldingcitations
- 2020Morphological, optical and photovoltaic characteristics of MoSe2/SiOx/Si heterojunctionscitations
- 2020Influence of Operating Conditions on the Thermal Behavior and Kinetics of Pine Wood Particles Using Thermogravimetric Analysiscitations
- 2020Experimental comparative study of the variants of high-temperature vacuum-assisted resin transfer mouldingcitations
- 2019Printed Flexible mu-Thermoelectric Device Based on Hybrid Bi2Te3/PVA Compositescitations
- 2018The effect of the heating and air flow rate on the mass loss of pine wood particles
- 2017High-performance graphene-based carbon nanofiller/polymer composites for piezoresistive sensor applicationscitations
- 2016Strong increase of the dielectric response of carbon nanotube/poly(vinylidene fluoride) composites induced by carbon nanotube type and pre-treatmentcitations
- 2016Strong increase of the dielectric response of carbon nanotube/poly(vinylidene fluoride) composites induced by carbon nanotube type and pre-treatmentcitations
- 2016Finite-Size Effects in the Absorption Spectra of a Single-Wall Carbon Nanotubecitations
- 2014Effect of carbon nanotube type and functionalization on the electrical, thermal, mechanical and electromechanical properties of carbon nanotube/styrene-butadiene-styrene composites for large strain sensor applicationscitations
- 2014Sharing of classical and quantum correlations via XY interactioncitations
- 2013Rheological and electrical analysis in carbon nanofiber reinforced polypropylene compositescitations
- 2012On the origin of the electrical response of vapor grown carbon nanofiber + epoxy composites
- 2012Comparative analyses of the electrical properties and dispersion level of VGCNF and MWCNT: epoxy compositescitations
- 2012Modeling And Simulating A Breeder Hybrid Soliton Reactor
- 2012Critical behavior of a three-dimensional hardcore-cylinder composite systemcitations
- 2012The effect of nanotube surface oxidation in the electrical response of MWCNT/PVDF nanocompositescitations
- 2012Temperature dependence of the electrical conductivity of vapor grown carbon nanofiber/epoxy composites with different filler dispersion levelscitations
- 2012The role of disorder on the AC and DC electrical conductivity of vapour grown carbon nanofibre/epoxy compositescitations
- 2012The effect of nanotube surface oxidation on the electrical properties of multiwall carbon nanotube/poly(vinylidene fluoride) compositescitations
- 2011The role of solvent evaporation in the microstructure of electroactive β-poly(vinylidene fluoride) membranes obtained by isothermal crystallizationcitations
- 2011The influence of the dispersion method on the electrical properties of vapor-grown carbon nanofiber/epoxy compositescitations
- 2011The role of solvent evaporation in the microstructure of electroactive beta-poly(vinylidene fluoride) membranes obtained by isothermal crystallizationcitations
- 2011Poly(vinylidene fluoride-trifluoroethylene) (72/28) interconnected porous membranes obtained by crystallization from solutioncitations
- 2011The influence of matrix mediated hopping conductivity, filler concentration, aspect ratio and orientation on the electrical response of carbon nanotube/polymer nanocompositescitations
- 2011Applying complex network theory to the understanding of high-aspect-ratio carbon-filled compositescitations
- 2010The dominant role of tunneling in the conductivity of carbon nanofiber-epoxy compositescitations
- 2010Electroactive poly(vinylidene fluoride-trifluoroethylene) membranes obtained by isothermal crystallization from solution
- 2010Poly[(vinylidene fluoride)-co-trifluoroethylene] membranes obtained by isothermal crystallization from solutioncitations
- 2010Influence of fiber aspect ratio and orientation on the dielectric properties of polymer-based nanocompositescitations
- 2010Piezoresistive effect in polypropylene-carbon nanofiber composites obtained by shear extrusioncitations
- 2010The piezoresistive effect in polypropylene-carbon nanofibre composites obtained by shear extrusioncitations
- 2009The effect of fibre concentration on the α to β-phase transformation, degree of crystallinity and electrical properties of vapour grown carbon nanofibre/poly(vinylidene fluoride) compositescitations
- 2007CMOS x-ray image sensor arraycitations
- 2006Development of GF/PP towpreg woven fabrics for composite reinforcements
Places of action
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article
Comparative analyses of the electrical properties and dispersion level of VGCNF and MWCNT: epoxy composites
Abstract
The electrical properties and dispersion of vapor-grown carbon nanofibers (VGCNF) and multi-walled carbon nanotubes (MWCNT) - epoxy resin composites are studied and compared. A blender was used to disperse the nanofillers within the matrix, producing samples with concentrations of 0.1, 0.5 and 1.0 wt.% for both nanofillers, besides the neat sample. The dispersion of the nanofillers was qualitatively analyzed using scanning electron microscopy (SEM), transmission optical microscopy (TOM) and greyscale analysis (GSA). The electrical conductivity and the dielectric constant were evaluated. The percolation threshold of MWCNT epoxy composites is lower than 0.1 wt.% while for VGCNF lies between 0.1 and 0.5 wt.%. The difference on the dispersion ability of the two nanofillers is due to their intrinsic characteristics. Celzard’s theory is suitable to calculate the percolation threshold bounds for the VGCNF composites but not for the MWCNT composites, indicating that intrinsic characteristics of the nanofillers beyond the aspect ratio are determinant for the MWCNT composites electrical conductivity. ; Foundation for Science and Technology, Lisbon, for financial support through the 3 degrees Quadro Comunitario de Apoio, the POCTI and FEDER programmes, projects PTDC/CTM/69316/2006, PTDC/CTM-NAN/112574/2009, and NANO/NMed-SD/0156/2007, and grants SFRH/BD/41191/2007 (P. C.) and SFRH/BD/60623/2009 (J.S.). The authors thank Albermarle for the hardener, Hexion Specialty Chemicals for the epoxy resin, and Nanocyl for providing the MWCNT. Also thank the COST actions MP1003 "European Scientific Network for Artificial Muscles" (ESNAM) and MP0902 "Composites of Inorganic Nanotubes and Polymers (COINAPO)" for their support.