Electrospun nanofibers from a mixture of cellulose acetate and Ag or Cu2O/CuO nanoparticles

 

S. Kendouli1,*, S. Achour1, N. Sobti1, R. Bouzerara2 and O. Khalfallah3

 

1Ceramics Laboratory, Faculty of Science, Mentouri University, Constantine, Algeria

2Electrotechnics Department, Skikda University, Algeria

3Laboratory of Microstructures and Defects in Materials, Faculty of Science, Mentouri University, Constantine, Algeria

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In recent years, intensive researches have started to concentrate on the preparation of different nanoparticles/polymer nanocomposites into fibrous structures. The aim of this work was to embed Ag and CuO nanoparticles synthesized by polyol method into a nanofibrous structure via electrospining technique. For the preparation of silver nanoparticles by the polyol process, silver nitrate was used as the starting precursor for the colloidal silver preparation and diethylene glycol was used as a solvent and reducing agent while Poly(vinylpyrrolidone) was used as a capping agent. The Poly(vinylpyrrolidone) was completly dissolved in diethylene glycol at room temperature to which AgNO3  was added. After stirring, Ag nanoparticles dispersion in yellow solution was obtained. Polyol synthesis of cuprous oxide Cu2O nanoparticles was carried out by reducing CuCl2.2H2O with sodium hydroxide in the presence of diethylene glycol as a solvent and capping agent. The Ag and Cu2O nanoparticles were characterized by UV-Vis spectroscopy. To prepare nanofibers, cellulose acetate was dissolved in N-N Dimetyl formamid solution. Different concentrations of Ag and Cu2O solutions were added to the cellulose acetate solution and processed in an electro spinning device. It was observed that the heating of Cu2O nanoparticles/cellulose acetate solution transformed Cu2O into CuO and the nanofibers with Ag exhibited high hydrophobicity while those with CuO showed high hydrophilicity. The effect of nanoparticles concentration on the thermal behavior of the resultant fibres was examined by means of Differentiel Scanning Calorimetry (DSC) and Fourier Transform Infrared Spectroscopy (FTIR). The influence of nanoparticles on the size  and  morphology  of  the  nanofibers  was  examined  by  scanning  electron  microscopy (SEM). Electrochemical properties of the as-spun nanofibers were carried out in K2SO4 medium. In particular the Ag/cellulose nanofibres present gated voltage hydrophilicity behavior like.

 

Keywords: nanofibers, nanoparticles, electrospinning, DSC, FTIR, SEM, UV-Vis