The Fourier transform infrared spectroscopy (FTIR) results demonstrated interactions
between the cellulose and gelatin. Incorporation of gelatin into a cellulose nanofiber
network resulted in significantly improved optical transparency and water absorption
capacity of the films. A significant drop in the mechanical strengths and a decrease in the
porosity of the film were observed when the supplement of gelatin was more than
3% (w/v). The BCG films showed no cytotoxicity against Vero cells