caa a22 4500 463247507 CHVBK 20180405153330.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s10086-006-0845-9 doi (NATIONALLICENCE)springer-10.1007/s10086-006-0845-9 Contribution of lignin to the reactivity of wood in chemical modifications II: influence of delignification on reaction with vaporous formaldehyde [Elektronische Daten] [Kazuya Minato, Hiroyuki Hosoo, Shingo Kawaguchi] Participation of lignin in the reaction between vapor-phase formaldehyde and wood was examined by using gradually delignified wood meal. A fi rst-order rate equation was successfully applied to the weight gain data. From the estimated reaction parameters such as rate constant, k, and ultimate weight gain, a, the reactivity toward formaldehyde was discussed among wood components, and compared with that for acetylation. k decreased monotonously with progress of the elimination of lignin, suggesting that the reaction rate of lignin is dominant over that of whole wood, and the decrease in the ratio of lignin retarded the reaction of wood as a whole. On the other hand, a increased with decreasing lignin content. This may be attributable to the enhanced reactivity of the remaining lignin due to some structural changes and to the increase in the number of reactive sites in polysaccharides as a result of their exposure accompanying the elimination of lignin. The dependencies of k and a on the lignin content were not similar to the case for acetylation, probably because of the difference in the reaction phase. In vapor-phase formaldehyde treatment, the remaining lignin reacts as it is, whereas in liquid-phase acetylation it would undergo rearrangement or swelling of the structure in the reaction solution. The Japan Wood Research Society, 2007 Chemical modification nationallicence Formaldehyde treatment nationallicence Lignin content nationallicence Reactivity nationallicence Reaction parameter nationallicence Minato Kazuya Graduate School of Agriculture, Kyoto Prefectural University, Shimogamo Hangi-cho, Sakyo-ku, 606-8522, Kyoto, Japan aut Hosoo Hiroyuki Faculty of Agriculture, Kyoto Prefectural University, 606-8522, Kyoto, Japan aut Kawaguchi Shingo Graduate School of Agriculture, Kyoto Prefectural University, Shimogamo Hangi-cho, Sakyo-ku, 606-8522, Kyoto, Japan aut Journal of Wood Science Springer-Verlag 53/3(2007-06-01), 255-257 1435-0211 53:3<255 2007 53 10086 https://doi.org/10.1007/s10086-006-0845-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10086-006-0845-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Minato Kazuya Graduate School of Agriculture, Kyoto Prefectural University, Shimogamo Hangi-cho, Sakyo-ku, 606-8522, Kyoto, Japan aut NATIONALLICENCE 700 1- Hosoo Hiroyuki Faculty of Agriculture, Kyoto Prefectural University, 606-8522, Kyoto, Japan aut NATIONALLICENCE 700 1- Kawaguchi Shingo Graduate School of Agriculture, Kyoto Prefectural University, Shimogamo Hangi-cho, Sakyo-ku, 606-8522, Kyoto, Japan aut NATIONALLICENCE 773 0- Journal of Wood Science Springer-Verlag 53/3(2007-06-01), 255-257 1435-0211 53:3<255 2007 53 10086 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 463247493 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer