The effect of various electrospinning parameter on preparation of alumina nanofibers

Abstract Alumina nanobers were successfully prepared via an electrospinning technique with combination of aluminum oxyhydroxide (AlOOH) as alumina precursor and Polyvinylpyrrolidone (PVP) as the polymer precursor. To produced alumina precursor, Aluminum Isopropoxide (AIP) was dissolved in distilled water under the constant stirring process at 80°C. Electrospinning solution was prepared by mixing Aluminum Oxyhydroxide (AlOOH) and Polyvinylpyrrolidone (PVP) aqueous solution for 2 hours under room temperature. Different concentrations of polymer precursor and various electrospinning parameters such as applied voltage, distance tip to collector, and flowrate of sol-gel were studied. The as-spun fibers were calcined at 1200°C and characterized by SEM. Results showed that the average fiber diameter decreases with decreasing of Polyvinylpyrrolidone (PVP) solution concentration, increasing of applied voltages and decreasing of electrospinning flow rate. At 10%wt Polyvinlpyrrolidone (PVP) concentration with 17.5v of applied voltages and 0.03 ml/min of flow rates, calcined fibers showed an average diameter of 100-200nm.