EFFECT OF STEAMING ON THE SOLUBILITY AND STRUCTURAL-CHANGES OF WOOD LIGNIN POLYSACCHARIDE COMPLEX

Citation
B. Kosikova et al., EFFECT OF STEAMING ON THE SOLUBILITY AND STRUCTURAL-CHANGES OF WOOD LIGNIN POLYSACCHARIDE COMPLEX, Cellulose Chemistry and Technology, 29(6), 1995, pp. 683-690
Citations number
22
Categorie Soggetti
Materials Science, Paper & Wood
ISSN journal
05769787
Volume
29
Issue
6
Year of publication
1995
Pages
683 - 690
Database
ISI
SICI code
0576-9787(1995)29:6<683:EOSOTS>2.0.ZU;2-#
Abstract
IR spectroscopy was applied for the structural studies of it situ lign in-poly-saccharide complex of aspen-, beech- and sprucewood in various steaming processes. The absorbance changes of the absorption band at 1760 cm(-1) were found to be connected with splitting of the lignin-xy lan complex, deacetylation of the glucuronoxylan component and ionizat ion of its carboxyl does not reflect the preferential removal of acidi c xylan. In comparison with native wood, all steamed wood samples show increased crystallinity of the cellulose component determined on the base of the absorbance ratios of absorption bands: 1108 cm(-1)/1091 cm (-1), 1430 cm(-1)/1403 cm(-1) and 1459 cm(-1)/1403 cm(-1).