Table 5.
Silk film thickness and oxygen permeability properties for multiple processing and RH conditions.
| Testing Condition | FilmThickness (μm) | O2GTR (mL O2/m2·d) | Dk [10−11(mL O2·cm)/(s·cm2·mmHg)] | Time to Steady State (min) | ||
|---|---|---|---|---|---|---|
| 15 (min) | 135 (min) | 15 (min) | 135 (min) | |||
| Water-annealed @ 80% RH | 29.6 ± 6.3 | 4,143 ± 1,953 | 4,245 ± 1,989 | 1.75 ± 0.43 | 1.80 ± 0.41 | 65 ± 8.66 | 
| MeOH treated @ 80% RH | 95.7 ± 2.4 | 2,971 ± 91 | 3,701 ± 61 | 4.07 ± 1.50 | 5.07 ± 1.44 | > 135 | 
| Water-annealed @ 50% RH | 40.5 ± 9.7 | 375.0 ± 54.7 | 54.7 ± 25.7 | 0.21 ± 0.05 | 0 | 50 ± 8.66 | 
| MeOH treated @ 50% RH | 89.1 ± 1.4 | 1,655 ± 704 | 185 ± 104 | 2.25 ± 0.98 | 0.25 ± 0.14 | > 135 | 
RH – relative humidity; O2GTR – oxygen transmissibility; Dk – oxygen permeability coefficient (n=3, error=SD)