Table 2.
Maximum water absorption amount and diffusion coefficient of neat PLA, DL/PLA and EDL (1.5)/PLA composite films containing different lignin contents.
| Sample | Maximum Water Absorption Amount (%) | Diffusion Coefficient | |||
|---|---|---|---|---|---|
| Short-Term (Ds) | Long-Term (Dl) | ||||
| Ds × 1012/m2 s−1 | R2 | Dl × 1012/m2 s−1 | R2 | ||
| Neat PLA | 1.8 | 10.6 | 0.978 | 5.0 | 0.920 |
| DL/PLA (10/90) | 2.7 | 4.6 | 0.999 | 2.0 | 0.993 |
| DL/PLA (30/70) | 3.7 | 3.7 | 0.990 | 1.2 | 0.987 |
| DL/PLA (50/50) | 4.2 | 3.3 | 0.989 | 0.9 | 0.994 |
| EDL(1.5)/PLA (10/90) | 1.9 | 2.1 | 0.994 | 1.2 | 0.927 |
| EDL(1.5)/PLA (30/70) | 1.5 | 3.0 | 0.995 | 1.3 | 0.986 |
| EDL(1.5)/PLA (50/50) | 1.2 | 2.6 | 0.989 | 0.9 | 0.967 |