Radiolytic Method as a Novel Approach for the Synthesis of Nanostructured Conducting Polypyrrole
TypeArticles dans des revues avec comité de lecture
In this study, a novel and extremely facile method for the synthesis of conducting polypyrrole (PPy) was achieved in aqueous solution. This radiolytic method is totally free of template and environmentally friendly compared with traditional chemical methods. According to ultraviolet-visible (UV-vis) spectroscopy and Fourier transform infrared (FTIR) spectroscopy analysis, pyrrole (Py) monomers were polymerized into PPy thanks to their oxidation by HO∙ radicals produced by the radiolysis of water when exposed to γ irradiation. The morphology of PPy was characterized by Cryo-transmission electron microscopy (Cryo-TEM) in aqueous solution and by scanning electron microscopy (SEM) after deposition. In an original way, high resolution atomic force microscopy, coupled with infrared nanospectroscopy, is used to probe the local chemical composition of PPy nanostructures. The results demonstrated that spherical and chaplet-like PPy nanostructures were formed by γ-radiolysis. Thermogravimetric analysis (TGA) and electronic conductivity measurements showed that radiosynthesized PPy had good thermal stability and an electrical conductivity higher than that of chemically synthesized PPy.
Showing items related by title, author, creator and subject.
Impact on thermomechanical behaviour of a maleic anhydride grafted ABS on ABS/PC multi-layered blends GERVAIS, Matthieu; ALKHUDER, A; GRANDMONTAGNE, A.; GUINAULT, Alain; SOLLOGOUB, Cyrille (2013)The significant increase of Waste Electric and Electronic Equipment (WEEE) has led to an important research in upgrading recycled engineering plastics by means of a blending technique. In particular, there is an interest ...
Preparation and characterization of poly(ethylene terephthalate) ﬁlms coated by chitosan and vermiculite nanoclay ESSABTI, Fatima; GERVAIS, Matthieu; ETTAQI, Saïd; REGNIER, Gilles; ROLAND, Sébastien; GUINAULT, Alain (elsevier, 2018)Chitosan (CS) layers are coated on a poly(ethylene terephthalate) (PET) film in order to decrease the oxygen permeability through the polymeric films for food packaging applications. Oxygen transmission rate (OTR) of the ...
Combined compatibilization and plasticization effect of low molecular weight poly(Lactic acid) in poly(lactic acid)/poly(3-hydroxybutyrate-co-3-hydroxyvalerate) blends MIQUELARD, Guillaume; GUINAULT, Alain; SOLLOGOUB, C.; GERVAIS, Matthieu (Polymer Letters, 2018)Improving overall properties of poly(lactic acid) (PLA) by blending it with another biobased polymer has been a strong field of research over the last years. In this study we demonstrate the synergetic effect of a small ...
Analysis and possible estimation of keyhole depths evolution, using laser operating parameters and material properties FABBRO, Rémy; DAL, Morgan; PEYRE, Patrice; COSTE, Frédéric; SCHNEIDER, Matthieu; GUNENTHIRAM, V (Laser Institute of America, 2018)The authors propose an analysis of the effect of various operating parameters on the keyhole depth during laser welding. The authors have developed a model that uses the analysis of the thermal field obtained in 2D geometry, ...
Analysis of laser–melt pool–powder bed interaction during the selective laser melting of a stainless steel GUNENTHIRAM, Valérie; PEYRE, Patrice; SCHNEIDER, Matthieu; DAL, Morgan; COSTE, Frédéric; FABBRO, Rémy (Laser Institute of America, 2017)The laser powder bed fusion (LPBF) or powder-bed additive layer manufacturing process is now recognized as a high-potential manufacturing process for complex metallic parts. However, many technical issues are still to ...