Polyamic Acid Nanofibers Produced by Needleless Electrospinning

Table 1

Dependence of the fiber diameters and filtration properties of PAA nanofibers.

Solution concentration (wt.%)	Average fiber diameter (nm)	Filtration efficiency (%)	Pressure drop (Pa)
21.5	143	97.5	94
22	162	94.6	90
22.5	199	92.3	89
24	318	81.0	70
26	475	76.3	64