Table 2: Relative content of secondary structure of group B porous silk fibroin scaffold during degradation (%).

Degradation time/day0 d6 d18 d

Side chain3.444.776.08
𝛽 -sheet28.3434.5739.26
Random coil22.6720.9916.90
𝛼 -form10.379.809.40
Turns35.1829.8728.35