832710.fig.002a
(a)
832710.fig.002b
(b)
832710.fig.002c
(c)
832710.fig.002d
(d)
832710.fig.002e
(e)
832710.fig.002f
(f)
832710.fig.002g
(g)
832710.fig.002h
(h)
832710.fig.002i
(i)
832710.fig.002j
(j)
832710.fig.002k
(k)
832710.fig.002l
(l)
Figure 2: SEM images for the freeze-dried 5.0 wt% silk fibroin solution ((a)-(b)) and SF/PNIPAAm composite gel prepared with various concentration of each polymer. ((c)-(d)) 5.0 wt% SF and 3.0 wt% PNIPAAm; (e)-(f) 5.0 wt% SF and 2.0 wt% PNIPAAm; (g)-(h) 5.0 wt% SF and 1.0 wt% PNIPAAm; (i)-(j) 3.0 wt% SF and 3.0 wt% PNIPAAm; (k)-(l) 1.0 wt% SF and 3.0 wt% PNIPAAm.