Table 3.

Average diameters of block type PUSX nanofibers under optimized spinning conditions.

Sample	Polymer Concentration (wt %)	Voltage (kV)	Average Diameter (nm)	SD (nm)
PU	15	20	720	215
Si01	20	20	636	179
Si02	20	20	690	150
Si03	15	20	548	128
Si04	13	20	440	89
Si01-20	13	17	531	142
Si01-40	10	17	402	94
Si01-59	10	17	471	111