Abstract - A simple and non-conventional electrospinning technique was employed for producing highly
oriented Polyacrylonitrile (PAN) nanofibers. The PAN nanofibers were electrospun from 14 wt% solution of
PAN in dimethylformamid (DMF) at 11 kv on a rotating drum with various linear speeds from 22.5 m/min to
67.7 m/min. The influence of take up velocity was investigated on the degree of alignment, internal structure and
mechanical properties of collected PAN nanofibers. Using an image processing technique, the best degree of
alignment was obtained for those nanofibers collected at a take up velocity of 59.5 m/min. Moreover, Raman
spectroscopy was used for measuring molecular orientation of PAN nanofibers. Similarly, a maximum chain
orientation parameter of 0.25 was determined for nanofibers collected at a take up velocity of 59.5 m/min.
Keywords: Polyacrylonitrile; Nanofiber; Orientation; Eletrospinning.