P-32 低温水熱環境下におけるリグノクレゾールの分子応答(ポスターセッション1:技術05,研究発表(ポスター発表))

概要

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Lignophenol is a lignin-based biopolymer with various practical applications. In this study, Douglas fir lignocresol was hydrothermally treated at relatively low temperature from 110 to 300℃ for its sequential selective transformation. Based on the results obtained by GPC and FT-IR, the molecular structure of lignocresol does not change so much up to 170℃ under hydrothermal environments. Significant depolymerization started above 200℃ probably due to cleavage of the β-O-4 linkages. On the other hands, depolymerization started from 110℃ under N_2 atmosphere, followed by a formation of new C-C linkages via uncontrollable radical coupling. Char formation was inhibited under hydrothermal conditions much better than N_2 atmosphere. Compared with simple pyrolysis, hydrothermal treatment can be a promising technique to control the molecular structure of lignophenol without unexpected condensation reactions.
2011-01-12