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
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).