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polypyrrole coated cellulosic substrate modified by copper oxide.

Auteurs : L. MAKHLOUFI, A. HAMAM, D. OUKIL and A .DIB
Année : 2014
Domaine : Génie Chimique
Type : Communication
Conférence: Science and Applications of Thin Films, Conference & Exhibition (SAFT 2014) Çesme, Izmir, Turkey, September 15 to 19, 2014.
Résumé en PDF : (résumé en pdf)
Fulltext en PDF : (.pdf)
Mots clés : modified polypyrrole, copper oxides

Résumé :

Firstly, the chemical polymerization of polpyrrole onto cellulosic substrate is conducted by using FeCl3 as an oxidant and pyrrole as monomer. Different parameters were tested (monomer concentration, duration of the experiment, nature of supporting electrolyte, temperature, etc…) in view to obtain films with different thickness and different morphologies. Thickness and topography of different PPy deposits (films) were estimated by a profilometer apparatus. The electrochemical reactivity of the obtained electrodes was tested by voltamperometry technique (CV) and electrochemical impedance spectroscopy (SIE).Secondly, the modification of the PPy film surface by incorporation of copper oxide nanoparticles is conducted by applying a galvanostatic procedure from a CuCl2 solution.Surface characterization has been carried out using scanning microscope (SEM) coupled with energy dispersive X-ray analysis (EDX), fourier-transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The analysis showed clearly the presence of the copper oxide nanoparticles (CuO and Cu2O) in the polymer films with dimensionsless than 50 nm.