Table 2.
Crystallinities of cellulose from different sources determined by XRD and NMR analysis methods.
| Cellulose sample | XRD∗ | NMR∗∗ | ||
|---|---|---|---|---|
| Peak height | Peak deconvolution | Amorphous subtraction | C4 peak separation | |
| Bacterial microcrystalline cellulose | 95.2 | 73.1 | 82.4 | 73.8 |
| Avicel PH-101 | 91.7 | 60.6 | 77.7 | 56.7 |
| SigmaCell 50 | 91.2 | 61.3 | 79.4 | 56.1 |
| SigmaCell 20 | 84.8 | 64.2 | 67.0 | 52.6 |
| JT Baker cellulose | 85.5 | 61.5 | 69.1 | 49.1 |
| Fluka cellulose | 82.9 | 52.9 | 61.6 | 48.6 |
| SolkaFloc cellulose | 78.3 | 56.8 | 57.2 | 43.9 |
| Sigma α-cellulose | 78.0 | 55.9 | 54.4 | 41.5 |
∗XRD: X-ray Diffraction; ∗∗NMR: Nuclear Magnetic Resonance Spectroscopy. All values are means (Park et al., 2010).