was identified by scanning electron microscopy sem as shown in fig1 the average diameter thereof was then further measured and the result is shown in table 3 example 12 was performed the same as example 9 with the exception of substitution of 0 2 wt pyridine with 4 0 wt dimethylacetamide and 0 4 lithium chloride to prepare the electrospinning composition the obtained polycarbonate nanofiber was identified by scanning electron microscopy sem as shown in fig1 the average diameter thereof was then further measured and the result is shown in table 3 polyvinylidene fluoride pellet molecular weight 64000 g mol was dissolved in dimethylacetamide to prepare a solution with 10 wt polycarbonate the polyvinylidene fluoride solution was loaded into a spinneret to perform an electrospinning process the applied voltage of the electrospinning process was 40 kv the diameter of the nozzle 0 4 mm the distance between the nozzle to the receiving plate 20 cm and the feed rate of the polyvinylidene fluoride solution 15 u03bcl min the deposit was cut and polyvinylidene fluoride nanofibers obtained at the receiving plate the polyvinylidene fluoride nanofiber was identified by scanning electron microscopy sem as shown in fig1 the average diameter thereof was then further measured and the result is shown in table 4 polyvinylidene fluoride pellet molecular weight 64000 g mol was dissolved in dimethylacetamide to prepare a solution with 10 wt polycarbonate lithium chloride was added.