Table 1.
Crystalline ultrastructural results for line-fitting of 13C CP/MAS spectra of microcrystalline cellulose (MCC) and cellulose from cotton swaps after various treatments used to isolate cellulose from whole biomass samples. The ± value represents thee standard deviation of typical variation associated with the measurement. Un = untreated, Hemi = hemicellulose removal by acid hydrolysis, H = holocellulose pulped, HH = holocellulose pulped and hemicellulose removal by acid hydrolysis. The plus-minus values represent thee standard deviations of typical variation associated with the measurement.
| Sample | Iα (%) ±3 | Iα+β (%) ±4 | Para (%) ±6 | Iβ (%) ±6 | CrI (%) ±2 | LFD (nm) ±0.5 |
|---|---|---|---|---|---|---|
| Un MCC | 8 | 11 | 35 | 8 | 62 | 5.2 |
| H MCC | 7 | 8 | 35 | 10 | 60 | 4.9 |
| HH MCC | 6 | 10 | 42 | 11 | 68 | 6.3 |
| Hemi MCC | 7 | 11 | 40 | 19 | 66 | 5.9 |
| Un cotton | 9 | 9 | 35 | 9 | 62 | 5.2 |
| H cotton | 6 | 13 | 40 | 6 | 66 | 5.9 |
| HH cotton | 6 | 14 | 49 | 6 | 79 | 9.9 |