| 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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González Cuervo, Claudia Paulina
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2019Removal of cadmium in wastewater through geopolymeric materials based on pumice.citations
- 2017Inclusion of geopolymers derivate from fly ash and pumice in reinforced concrete
- 2017Structural and mechanical study of concrete made from cementitious materials of low environmental impactcitations
- 2017Characterization of Tungsten Carbide coatings deposited on AISI 1020 steelcitations
- 2016Changes on electrical and structural properties of polyaniline and polypyrrol by mullite doping
- 2016Morphological analysis of carbon steels using fractal geometry
- 2014Synthesis and characterization of inorganic polymers from the alkali activation of an aluminosilicatecitations
- 2013Comparative study between structural and electrical properties of geopolymers applied to a green concretecitations
- 2013Conducting polymers doped with a mineral phase
- 2012Synthesis, characterization and ac-conductivity measurements of polyaniline based composites with fly-ash and clinker
- 2008The effect of Mn and B on the magnetic and structural properties of nanostructured Fe60Al40 alloys produced by mechanical alloying
- 2008Comparative study between melted and mechanically alloyed samples of the Fe50Mn10Al40 nanostructured systemcitations
- 2003Bulk Magnetic Properties of the Fe0.5Mn0.1Al 0.4 Disordered Alloycitations
- 2003Mössbauer and X-Ray Characterization of Fe0.2Mn 0.4Al0.4 Mechanically Alloyed Powders
- 2003Magnetic and Structural Properties of Fe-Mn-Al Alloys Produced by Mechanical Alloyingcitations
- 2001Magnetic phase diagram of the FexMn0.60-xAl0.40 (0.20≤x≤0.60) alloys mechanically alloyed for 48 hours
Places of action
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article
Synthesis, characterization and ac-conductivity measurements of polyaniline based composites with fly-ash and clinker
Abstract
<p>We report the synthesis, characterization and ac-conductivity (σ<sub>ac</sub>) results of some polyaniline (PAni) based composites. These materials were synthesized through incorporation of various fractions (20 to 60% by weight) of insulating fly-ash (FA) or clinker (Ck) in semiconducting PAni host. The synthesis was carried out for two different polymerization times (tp) of 8 and 14 h, at 5 °C through oxidative polymerization, using ammonium-persulfate as initiator. Characterization of samples was done using x-ray diffraction (XRD), electron microscopy (SEM), and infrared spectroscopy (FTIR). Electrical conductivity analysis showed that synthesis for longer tp produced more conducting samples because it allowed the formation of longer and thicker polymer chains. In general, σ<sub>ac</sub> of the composites further increased with the fraction of FA or Ck, at least up to their maximum concentration studied in this work. Uniformly dispersed particles of FA or Ck apparently occupied the vacant spaces within the intertwined bundles of several polymer chains in such a way that continuity of the latter was not broken. Consequently, their presence pushed the bundles, and thus the individual chains, closer to each other, making the polymer parts more compact. The increased compactness of these conductive parts facilitated better mobility of charge carriers and therefore, the electrical conductivity increased.</p>