THE INFLUENCE OF DISTANCE BETWEEN NEEDLE TIP AND COLLECTOR ON FORMATION OF TITANIUM DIOXIDE (TiO2) NANOFIBERS WITH ELECTROSPINNING METHOD Intan Wandira (a*), Posman Manurung (b), Simon Sembiring (b)
(a) Postgraduate Student of Physics Program, Faculty of Mathematics and Natural Science, University of Lampung, Jl. Sumantri Brojonegoro No. 1 Bandar Lampung, Indonesia
*intanwandira7[at]gmail.com
(b) Department of Physics, Faculty of Mathematics and Natural Science, University of Lampung, Jl. Sumantri Brojonegoro No. 1 Bandar Lampung, Indonesia
Abstract
Synthesis of Titanium Dioxide (TiO2) nanofibers has been successfully made using the electrospinning method. This study aims to determine the effect of distance variations on the morphology and crystal structure of TiO2 nanofibers. The variation of the distance between tip to collector used is 7, 9, 11 and 13 cm. The precursor used is TTIP, ethanol as a solvent, acetic acid as a catalyst and PVP as a fiber-forming polymer. The electrospinning process is carried out at a high voltage of 20 kV with a flow rate of 1.5 ml / hour then as-prepared nanofiber annealed at a temperature of 450oC for 3 hours. TiO2/PVP nanofibers are characterized using SEM-EDS and XRD. The results of the measurement of viscosity and surface tension showed that the TiO2/PVP solution could be processed by the electrospinning method. The value of viscosity and surface tension of the solution is 2,8 Pa.s and (28,9 ± 3,7) dyn/cm. The results of SEM characterization showed relatively uniform nanofiber morphology with fiber diameter ranging from 56 nm - 0,961 µm. The results of XRD characterization showed that the particle size of the TiO2 nanofibers ranged from 12 nm with the crystal structure formed, namely anatase phase.
