Table 3 XPS, acetyl, hydrophobicity, and crystallinity index (%) analysis of non-pretreated and 5% AC-pretreated poplar
Treatment time | C1 (%) | C2 (%) | C3 (%) | O/C | Acetyl (%) | Hydrophobicity (L/g) | Crystallinity index (%) |
|---|---|---|---|---|---|---|---|
Raw poplar | 54.0 | 35.8 | 10.2 | 0.68 | 3.7 ± 0.2 | 0.37 | 47.1 |
10 min | 56.0 | 34.0 | 10.0 | 0.37 | 5.7 ± 0.0 | 0.54 | 48.9 |
30 min | 53.8 | 37.9 | 8.3 | 0.40 | 5.9 ± 0.0 | 0.49 | 55.2 |
50 min | 49.4 | 44.5 | 6.1 | 0.41 | 5.7 ± 0.2 | 0.31 | 56.7 |