caa a22 4500 463216989 CHVBK 20180405153200.0 cr unu---uuuuu 170326e20070201xx s 000 0 eng 10.1007/s00226-006-0092-7 doi (NATIONALLICENCE)springer-10.1007/s00226-006-0092-7 Chemical reactivity of heat-treated wood [Elektronische Daten] [G. Nguila Inari, M. Petrissans, P. Gerardin] Chemical reactivity of heat-treated wood was compared with that of untreated wood. For this purpose, heat-treated pine or beech sawdust was reacted with different carboxylic acid anhydrides in pyridine or with phenyl isocyanate in dimethyl formamide. Compared to controls, weight gains obtained with heat-treated sawdust are smaller showing a lower chemical reactivity. FTIR analyses of lignin and holocellulose fractions, isolated after acidic hydrolysis of polysaccharides or delignification with sodium chlorite, indicate that both components are involved in the reactions. Compared to lignin, holocellulose exhibits important infrared absorptions of about 1,730cm−1, characteristic of ester or urethane linkages formed. Lower reactivity of heat-treated sawdust is explained by the decrease in free reactive hydroxyl groups in holocellulose due to the thermal degradation of hemicelluloses, considered more reactive than cellulose. Springer-Verlag, 2006 Nguila Inari G. Laboratoire d'Etudes et de Recherches sur le Matériau Bois, UMR_A 1093 Faculté des Sciences et Techniques, Université Henri Poincaré Nancy I, BP 239, 54506, Vandoeuvre-lès-Nancy, France aut Petrissans M. Laboratoire d'Etudes et de Recherches sur le Matériau Bois, UMR_A 1093 Faculté des Sciences et Techniques, Université Henri Poincaré Nancy I, BP 239, 54506, Vandoeuvre-lès-Nancy, France aut Gerardin P. Laboratoire d'Etudes et de Recherches sur le Matériau Bois, UMR_A 1093 Faculté des Sciences et Techniques, Université Henri Poincaré Nancy I, BP 239, 54506, Vandoeuvre-lès-Nancy, France aut Wood Science and Technology Springer-Verlag 41/2(2007-02-01), 157-168 0043-7719 41:2<157 2007 41 226 https://doi.org/10.1007/s00226-006-0092-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00226-006-0092-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nguila Inari G. Laboratoire d'Etudes et de Recherches sur le Matériau Bois, UMR_A 1093 Faculté des Sciences et Techniques, Université Henri Poincaré Nancy I, BP 239, 54506, Vandoeuvre-lès-Nancy, France aut NATIONALLICENCE 700 1- Petrissans M. Laboratoire d'Etudes et de Recherches sur le Matériau Bois, UMR_A 1093 Faculté des Sciences et Techniques, Université Henri Poincaré Nancy I, BP 239, 54506, Vandoeuvre-lès-Nancy, France aut NATIONALLICENCE 700 1- Gerardin P. Laboratoire d'Etudes et de Recherches sur le Matériau Bois, UMR_A 1093 Faculté des Sciences et Techniques, Université Henri Poincaré Nancy I, BP 239, 54506, Vandoeuvre-lès-Nancy, France aut NATIONALLICENCE 773 0- Wood Science and Technology Springer-Verlag 41/2(2007-02-01), 157-168 0043-7719 41:2<157 2007 41 226 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer