Figure 6.
SEM micrographs of the hydrogel sections. (a) hydrogel 3 (5 wt% S1200MA DS 2); (b) Hp3 (10 mM HpMA); (c) Hp12 (10 mM HpMA + 5 wt% S1200MA DS 2); (d) Hp14 (1 mM HpMA+ 15 wt% S1200MA DS 5), (e) Hp19 (10 mM HpMA + 5 wt% S1200SH), (f) Hp15 (10 mM HpMA+ 15% wt S1200MA DS 5). Crosslinking densities are 5.7, 3.0, 1.4, 2.9, 3.3 and 4.4 respectively.