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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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Paiva, Maria C.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2024Application of sound waves during the curing of an acrylic resin and its composites based on short carbon fibers and carbon nanofibers
- 2024Multi-scale experimental investigation on the structural behaviour of novel nanocomposite/natural textile-reinforced mortarscitations
- 2024High-performance PEEK/MWCNT nanocomposites: Combining enhanced electrical conductivity and nanotube dispersioncitations
- 2024Shape-memory polymers based on carbon nanotube composites
- 2023Fabrication of low electrical percolation threshold multi-walled carbon nanotube sensors using magnetic patterningcitations
- 2023Graphene/polyurethane nanocomposite coatings – Enhancing the mechanical properties and environmental resistance of natural fibers for masonry retrofittingcitations
- 2022Hybrid structures for Achilles' tendon repaircitations
- 2022The potential of beeswax colloidal emulsion/films for hydrophobization of natural fibers prior to NTRM manufacturingcitations
- 20213D printing of graphene-based polymeric nanocomposites for biomedical applicationscitations
- 2021Development of electrically conductive polymer nanocomposites for the automotive cable industrycitations
- 2021Poly(lactic acid)/graphite nanoplatelet nanocomposite filaments for ligament scaffoldscitations
- 2021Rheologically assisted design of conductive adhesives for stencil printing on PCBcitations
- 2021Insight into the Effects of Solvent Treatment of Natural Fibers Prior to Structural Composite Casting: Chemical, Physical and Mechanical Evaluationcitations
- 2021Polylactic acid/carbon nanoparticle composite filaments for sensingcitations
- 2020Mixed Carbon Nanomaterial/Epoxy Resin for Electrically Conductive Adhesivescitations
- 2018Effects of particle size and surface chemistry on the dispersion of graphite nanoplates in polypropylene compositescitations
- 2018Electrically conductive polyetheretherketone nanocomposite filaments: from production to fused deposition modelingcitations
- 2017Green synthesis of novel biocomposites from treated cellulosic fibers and recycled bio-plastic polylactic acid
- 2017Biomedical films of graphene nanoribbons and nanoflakes with natural polymerscitations
- 2016Chitosan nanocomposites based on distinct inorganic fillers for biomedical applicationscitations
Places of action
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article
High-performance PEEK/MWCNT nanocomposites: Combining enhanced electrical conductivity and nanotube dispersion
Abstract
High-performance engineering thermoplastics offer lightweight and excellent mechanical performance in a wide temperature range. Their composites with carbon nanotubes are expected to enhance mechanical performance, while providing thermal and electrical conductivity. These are interesting attributes that may endow additional functionalities to the nanocomposites. The present work investigates the optimal conditions to prepare polyether ether ketone (PEEK)/multi-walled carbon nanotube (MWCNT) nanocomposites, minimizing the MWCNT agglomerate size while maximizing the nanocomposite electrical conductivity. The aim is to achieve PEEK/MWCNT nanocomposites that are suitable for melt-spinning of electrically conductive multifilament’s. Nanocomposites were prepared with compositions ranging from 0.5 to 7 wt.% MWCNT, showing an electrical percolation threshold between 1 and 2 wt.% MWCNT (107–102 S/cm) and a rheological percolation in the same range (1 to 2 wt.% MWCNT), confirming the formation of an MWCNT network in the nanocomposite. Considering the large drop in electrical conductivity typically observed during melt-spinning and the drawing of filaments, the composition PEEK/5 wt.% MWCNT was selected for further investigation. The effect of the melt extrusion parameters, namely screw speed, temperature, and throughput, was studied by evaluating the morphology of MWCNT agglomerates, the nanocomposite rheology, and electrical properties. It was observed that the combination of the higher values of screw speed and temperature profile leads to the smaller number of MWCNT agglomerates with smaller size, albeit at a slightly lower electrical conductivity. Generally, all processing conditions tested yielded nanocomposites with electrical conductivity in the range of 0.50–0.85 S/cm. The nanocomposite processed at higher temperature and screw speed presented the lowest value of elastic modulus, perhaps owing to higher matrix degradation and lower connectivity between the agglomerates. From all the process parameters studied, ...