Figure 7. The morphologies of the scaffolds before and after soaked in PBS and weight loss.
SEM images (a,b1,c1, b2,c2,b3,c3,b4,c4) and weight loss (d) of the PLLA (a,b1,b2,b3,b4) and PLLA/BN/ZnO-1-7 (a,c1,c2,c3,c4) scaffolds before (a) and after soaking in PBS for 7 (b1,c1), 14 (b2,c2), 21 (b3,c3) and 28 (b4,c4) days (*p < 0.05, **p < 0.01).