The effect of adding different amount of spinning additives on preparation of nano Alumina fibers using a combined method of sol gel and electrospining
Fateme Mirjalili
1
(
Department of material engineering,faculty of engineering,Islamic azad university Maybod beranch,Iran
)
fyrozeh danafar
2
(
Department of Chemical Engineering, University of Shahid Bahonar, Kerman, Iran
)
Keywords: Electrospinning, Sol-gel method, Nano alumina fiber,
Abstract :
Alumina nanofibers were produced using a combined method of sol-gel and electros pinning method. In this method, the sol was prepared by mixing of tri-isoproxide aluminum in aqueous solution onitric acid. Spinning aid such as: ethylene glycol-acid lactic and poly vinyl alcohol was added to the solution .The sol was then heated at 80 °C to obtain gel. Then, the resulting gel was converted into aluminum oxide nanofibers by electrospinning method. The nanofibers were dried at 60 °C for 24 h and finally sintered for 2 h at 1200 ° C. The results of XRD and FTIR showed that in all samples the dominant phase was the corundum phase. Finally, to decrease the sintering temperature, magnesium nitrate hexahydrate (MgN2O6 * 6H2O) and sodium ethoxylate (SiC8 H2o O4) were added to the sol containing 10% Polyvinyl alcohol. The results of XRD and FTIR indicated the presence of corundum phase when the sintering temperature of 1000°C was used. Accordingly, the energy consumption was reduced as the sintering temperature decreased about 200°C by adding the additives,. The results of SEM and TEM showed formation of non-agglomerated nano fibers with 41nm diameters at 1000°C when 10% polyvinyl alcohol and 2% sodium ethoxylate (SiC8 H20 O4) was added to the sol.