Carbon Nanofibers Fabricated from Electrsopun Polyacrylonitrile Precursor Nanofibers

Polyacrylonitrile(PAN) precursor nanofibers with average diameter of 350 nm were synthesized by electrospinning.They were preoxidized at 250,265 and 280 ℃ for 1 h,followed by carbonization at 1 000 ℃ to fabricate carbon nanofibers.The morphology,thermal property,and chemical structure of PAN precursor nanofibers,preoxidized PAN fibers and carbon nanofibers,were characterized by SEM,IR,DSC and XRD.It was found that the optimum preoxidation temperature for PAN precursor fibers was 280 ℃.The conductivity of the 1 000 ℃ carbonized PAN nanofibers after 280 ℃ preoxidation was(13±0.58) S/cm,and the conductivity was highly dependent on the preoxidation temperature.