Abstract:

In order to study the influence of spinning parameters on the orientation of nanofiber, the modified gap conductive plate method was adopted to fabricate PCL aligned nanofiber membrane. The mass fraction of PCL was set at 12% in this study, and a mixture solution, DCM/DMF (5/1,v/v) was used as solvent. The orientation degree of PCL nanofiber was observed by POM microscopy, and analyzed according to the definition of orientation degree. The effect of two spinning parameters, spinning distance and copper gap, on the orientation of PCL nanofiber was discussed in detail. The results showed that the orientation degree of PCL nanofiber was decreased with the increasing of spinning distance, while too small spinning distance would reduce the nanofiber orientation degree. Moreover, the orientation degree of PCL nanofiber also increased with the enlargement of copper gap in the receiving device, when the copper gap increased to a certain distance, the orientation degree of PCL nanofiber membrane trended to keep a fixed data.

Key words: electrospinning, aligned nanofiber, gap conductive plate method, polycaprotactone, spinning distance, copper spacing