Table 3. Tensile testing of spidroin-like fibers.
Mean values for tensile properties and the corresponding standard deviations (STDEV) were recorded. Units for each parameter in the table are described in the column headers. Data for N. clavipes major ampullate (MA) silk comes from Gosline et al. [5].
| Sample | Sample Number | Young's Modulus (MPa) | Breaking Stress (MPa) | Breaking Strain (unitless) | Toughness (J/cm^3) |
||||
|---|---|---|---|---|---|---|---|---|---|
| mean | STDEV | mean | STDEV | mean | STDEV | mean | STDEV | ||
| Sp1R8 Only | 7 | 572 | 339 | 53 | 17 | 0.21 | 0.05 | 6.63 | 2.89 |
| Sp1R8 & Amp | 5 | 1465 | 671 | 53 | 11 | 0.08 | 0.02 | 2.56 | 1.15 |
| Sp1R8 & Glut | 9 | 4587 | 854 | 148 | 21 | 0.04 | 0.01 | 3.45 | 1.35 |
| Sp2R8 Only | 5 | 1220 | 853 | 67 | 21 | 0.20 | 0.07 | 8.07 | 0.55 |
| Sp2R8 & Amp | 5 | 1067 | 342 | 37 | 13 | 0.09 | 0.02 | 2.15 | 0.40 |
| Sp2R8 & Glut | 14 | 4500 | 1347 | 142 | 59 | 0.04 | 0.01 | 3.35 | 1.79 |
| N. clavipes MA Silk | 22000 | 1300 | 0.12 | 80 | |||||