Table 1.

Summary of the mechanical properties for the glycerol-plasticized silk films.

Glycerol Content (%)	Young’s Modulus (GPa)	Strain to Failure (%)	Ultimate Strength (MPa)	Toughness (MJ/m3)
0	2.97 ± 0.12	1.69 ± 0.22	51.26 ± 4.61	0.46 ± 0.09
2	2.85 ± 0.25	1.80 ± 0.09	46.86 ± 2.48	0.65 ± 0.15
4	2.49 ± 0.25	1.90 ± 0.21	41.42 ± 2.80	0.53 ± 0.22
6	2.48 ± 0.16	2.02 ± 0.36	42.04 ± 2.80	0.55 ± 0.19
8	2.13 ± 0.35	2.22 ± 0.56	40.81 ± 4.08	0.64 ± 0.17
10	1.28 ± 0.27	3.39 ± 0.91	33.81 ± 3.66	0.93 ± 0.69
12	0.62 ± 0.09	22.9 ± 4.92	23.71 ± 3.24	15.34 ± 6.22
14	0.49 ± 0.08	74.24 ± 18.68	16.42 ± 0.91	14.45 ± 2.79
16	0.39 ± 0.06	99.83 ± 13.59	13.10 ± 1.50	14.84 ± 2.19
18	0.26 ± 0.05	117.18 ± 21.97	11.18 ± 2.67	13.61 ± 3.27
20	0.32 ± 0.07	164.56 ± 25.65	13.37 ± 1.52	20.26 ± 3.51
22	0.25 ± 0.02	153.62 ± 36.33	12.38 ± 1.33	18.45 ± 3.47
24	0.16 ± 0.03	223.89 ± 49.13	13.03 ± 1.75	22.81 ± 6.06
26	0.05 ± 0.01	314.4 ± 59.72	11.94 ± 2.21	25.75 ± 7.22
28	0.08 ± 0.01	330.34 ± 28.18	12.68 ± 1.33	29.08 ± 4.87
30	0.07 ± 0.01	364.42 ± 51.83	12.74 ± 1.51	32.19 ± 6.96