789289.fig.009a
(a)
789289.fig.009b
(b)
789289.fig.009c
(c)
789289.fig.009d
(d)
789289.fig.009e
(e)
789289.fig.009f
(f)
Figure 9: Morphologies of (a) as-spun gelatin nanofibers of a 10% w/v gelatin/TFE, (b) the smeared surface layer of as-spun gelatin nanofibrous membrane after adding a drop of water, (c) cross-linked electrospun gelatin fibers before water-resistant test, ((d)–(f)) cross-linked electrospun gelatin fibers soaked in 37°C DI water for (d) 2 days (e), 4 days, and (f) 6 days (FESEM after drying for 1 week in a vacuum oven). Adapted from Zhang et al. [116].