Abstract
The average lateral fibril aggregate dimensions and the crystallinity of the cellulose in a spruce kraft pulp were analysed by CP/MAS 13C-NMR spectroscopy in combination with spectral fitting. The average lateral fibril and lateral fibril aggregate dimensions were calculated from quantitative spectra of pure cellulose isolated from kraft pulps. Results showed that cellulose isolated by acid hydrolysis and chlorite-delignification from fines fraction enriched in surface material and long fiber fractions enriched in bulk material exhibited no major difference in either lateral dimension or crystallinity index.
| Original language | English |
|---|---|
| Pages (from-to) | 231-234 |
| Number of pages | 4 |
| Journal | Carbohydrate Polymers |
| Volume | 49 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 1 Aug 2002 |
| MoE publication type | Not Eligible |
Funding
This work was carried out within the framework of the Wood Ultrastructure Research Center (WURC), a NUTEK competence center at the Swedish University of Agricultural Sciences. The National Technology Agency of Finland (TEKES) is gratefully acknowledged for financial support. We are also indebted to Eino Grönlund (KCL) for the separation of the fines and fiber fractions.
Keywords
- Cellulose
- CP/MAS C-NMR
- Fiber surface
- Kraft pulp
- Supermolecular structure