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In this study, composite nanofiber films for the wound dressing application were prepared with silk fibroin (SF) and polycaprolactone (PCL) by electrospinning techniques, and the SF/PCL composite nanofiber films were characterized by the combined techniques of scanning electron microscopy (SEM), the equilibrium water content, Fourier transform infrared spectrometer test, X-ray diffraction (XRD) and cell viability test. The results indicated several parameters, including the rotating roller speed, solution concentration, and SF/PCL ratio, affected SF/PCL composite nanofibers’ diameter size, distribution, and wettability. The SF/PCL composite nanofiber manifested a smaller fiber diameter and more uniform nanofibers than pure PCL nanofibers. The contact angle changed from 121 ± 2° of the neat pure PCL to full wetting of 40% SF/PCL composite nanofiber films at 2,000 rpm, indicating good hydrophilicity. Meanwhile, cells exhibit adhesion and proliferation on the composite nanofiber films. These results testified that SF/PCL composite nanofiber films may provide good wettability for cell adhesion and proliferation. It was suggested that optimized SF/PCL composite nanofiber films could be used as a potential biological dressing for skin wound healing.

Characterization, biocompatibility, and optimization of electrospun SF/PCL composite nanofiber films