Effect of Solvent and Concentration of Polymeric Solution on the Morphology of Electrospun Nanofiber

In this paper the spinnability and the morphology of the Polyurethane (PU) nanofibers were investigated and discussed. The electrospinning parameters such as solution properties (polymer concentration and solvent) and processing parameters (applied electric field, needle to collector distance and solution flow rate) were optimized to achieve smooth, uniform bead-free fibers . at the first, a mixed solvent of THF and DMF at various percentage is used to create PU nanofibers without any bead and defect. Then in order to reduce the fiber diameter, the effect of polymeric solution concentration on the nanofiber morphology is investigated. it was found that the diameters and morphology of the nanofibers were influenced greatly by solution concentration and diameters increased with the solution concentrations increasing.

کلیدواژه ها:

Electrospinning ، Polyurethane ، Nanofiber