Abstract:

In this paper, the factors influencing the polypropylene (PP) fibers diameter prepared by melt electrospinning were discussed. The influencing factors, such as flow rate, temperature of polymer melt, applied voltage, distance between nozzle and target and electric field force were considered. The molten polymer deposited on the target at 0.05 mL/h was fibrous shape and the diameter of elecrospun fibers was in direct proportion to the flow rate. After polymer melt temperature reached up to 260C° (temperature of molten polymer)/280℃(temperature of spinneret), the diameter did not decrease any more. When the electric field force was constant, as the voltage and spinning distance before 30 mm increased, the average fiber diameter decreased. The flow rate was 0.05 mL/h, temperature was 260 °C/280C (polymer melt/nozzle), voltage was -24.6 kV and distance was 30 mm. The electrospun fiber under the parameters above was 6.23 μm, and standard deviation was 1.42.

Key words: polypropylene, melt electrospinning, influencing factor, fiber diameter