Polyacrylonitrile(PAN) /polyaniline(PANI) composite nanofibers with diameter about 500 nm were successfully prepared by electrospinning a precursor mixture of PAN and aniline(ANI)

followed by slow oxidative polymerization of ANI with ammonium persulfate(APS) in aqueous solutions.Morphology and structure of the resulting PAN /PANI nanofibers were characterized by scanning electron microscopy(SEM)

Fourier transform infrared spectroscopy(FTIR)

X-ray diffraction(XRD) and laser Raman spectroscopy.The factors influencing the morphology

size and uniformity of the composite nanofibers as well as the impact of the content of PANI on the electrical conductivity of the composite nanofibers were discussed

respectively.The results demonstrated that the PAN concentration

content of ANI added and applied electric voltage were the main factors which may influence the properties of the composite nanofibers.Moreover

PANI was nanodispered in the PAN matrix.The PAN /PANI composite nanofibers possessed good electrical conductivity

and the electrical conductivity could reach 10-2 S /cm

when the PANI content was over 18%.