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. Author manuscript; available in PMC: 2011 Jul 25.
Published in final edited form as: Macromol Biosci. 2010 Apr 8;10(4):393–403. doi: 10.1002/mabi.200900294

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)