The effect of adding different amount of spinning additives on preparation of nano Alumina fibers using a combined method of sol gel and electrospining

Document Type : Original Research Paper

Authors

1 Department of Material Engineering, Maybod Branch, Islamic Azad University, Maybod, Iran

2 Department of Chemical Engineering, University of Shahid Bahonar, Kerman, Iran

10.22034/jna.2020.680095

Abstract

Alumina nano fibers were produced using a combined method of sol-gel and
electros pinning method. The sol was first prepared by mixing of tri-isoproxide
aluminum in aqueous solution of nitric acid. In the next step, ethylene glycol,
acid lactic and poly vinyl alcohol were added to the solution .Finally, the sol was
then heated at 80 °C to obtain gel. The resulting gel was converted to nano fibers
of aluminum oxide by electrospinning method. The nano fibers were dried at
60 °C for 24 h and sintered at 1200 °C for 2 h. The results of XRD and FTIR
showed that, in all samples the dominant phase was the corundum phase. 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 XRD and FTIR analysis of this sample 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 SEM and TEM analysis also
showed formation of non-agglomerated nano fibers with diameters of 41nm
when 10% polyvinyl alcohol and 2% sodium ethoxylate (SiC8 H20 O4) was added
to the sol.

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