Effect of Sodium Carbonate Concentrations on the Formation and Mechanism of Regenerated Silk Fibroin Nanofibers by Electrospinning

Figure 7

SEM images of the diluted SF aqueous solutions with a concentration 0.001 wt% prepared from different Na₂CO₃ conditions: (a) 5%, (b) 0.5%, (c) 0.05%, and (d) 0.005%.

(a)

(b)

(c)

(d)