Table 3.
Design of experiments for the impregnation of GPEs into PLA.
| Variable | Levels | ||
|---|---|---|---|
| Low | Medium | High | |
| Pressure (A) | 100 bar | 250 bar | 400 bar |
| Temperature (B) | 35 °C | - | 55 °C |
| Extract (C) | Hydroethanolic GPE | - | Ethanolic GPE |
| Impregnation method (D) | SSI | - | PSI |
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