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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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Lanceros Mendez, S.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2018Piezoresistive polymer blends for electromechanical sensor applicationscitations
- 2015Effect of butadiene/styrene ratio, block structure and carbon nanotube content on the mechanical and electrical properties of thermoplastic elastomers after UV ageingcitations
- 2014Predicting the mechanical behavior of amorphous polymeric materials under strain through multi-scale simulationcitations
- 2014Extruded thermoplastic elastomers styrene-butadiene-styrene/carbon nanotubes composites for strain sensor applicationscitations
- 2012Determination of the parameters affecting electrospun chitosan fiber size distribution and morphologycitations
- 2010Enhancement of the Dielectric Constant and Thermal Properties of alpha-Poly(vinylidene fluoride)/Zeolite Nanocompositescitations
- 2009Piezoelectric micropump for lab-on-a-chip applicationscitations
- 2009Sigma-delta A/D converter for CMOS image sensorscitations
- 2004Dynamic mechanical analysis and creep behaviour of beta-PVDF filmscitations
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article
Enhancement of the Dielectric Constant and Thermal Properties of alpha-Poly(vinylidene fluoride)/Zeolite Nanocomposites
Abstract
Different commercial Y zeolites derivate from faujasite structure with similar total Si/Al ratio, NaY (Si/Al = 2.83), HY (Si/Al = 2.80), and HUSY (Si/Al = 3.00), but different framework Si/Al ratios were used to prepare alpha-poly(vinylidene fluoride) (alpha-PVDF)/zeolite nanocomposites. Structural and textural characterization of different Y zeolites was obtained by XRD, FTIR, elemental analysis and nitrogen adsorption isotherms. Nanocomposite films were prepared containing 14% (w/w) of zeolite and characterized in terms of the dielectric response and thermal stability. The best dielectric properties were obtained with NaY because of its smaller framework Si/Al ratio, which means a larger number of sodium in the zeolite structure. For this zeolite, the dielectric constant was increased by a factor higher than two, maintaining unaltered the dielectric loss for frequencies higher than 0.5 MHz. The zeolite HUSY, which presents an extended mesoporosity, shows the lowest onset temperature for thermal degradation. To clarify the origin of the dielectric response of the nancomposites, zeolites with different sodium amounts were obtained by ion exchange treatment using NaNO(3) for HY and NH(4)NO(3) for NaY. The dielectric constant was enhanced with increasing sodium content in the zeolite framework.