Fig. 3

The NC process fabrication, (A) preparation of TP and PBW solution, (B) the electrospinning device with two syringe pump to hybridize the TP and PBW components in the NC, Scanning electron microscopy (SEM) images, (C) PCL nanofibers, (D) PBW nanofibers, (E) NC nanofibers, (F) carbon element distribution pattern (blue dots), (G) Iron element distribution pattern (yellow dot) (H) distribution of oxygen element (violet dot), (I) Focused composite of the EDAX elements (C (blue dot), Fe (yellow dot) and O (violet dot)) on the surface of NC, (J) swelling ratio of the TP, TPN, PBW and NC, (K) the tensile stress analysis of the TP, TPN, PBW and NC.