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タイトル: | Characterization of lignin-derived products from Japanese cedar as treated by semi-flow hot-compressed water |
著者: | Takada, Masatsugu Saka, Shiro |
著者名の別形: | 坂, 志朗 |
キーワード: | Japanese cedar Hot-compressed water Lignin-derived products Condensed type lignin |
発行日: | 13-Feb-2015 |
出版者: | Springer Japan |
誌名: | Journal of Wood Science |
巻: | 61 |
号: | 3 |
開始ページ: | 299 |
終了ページ: | 307 |
抄録: | In order to elucidate the decomposition behavior of lignin from Japanese cedar (Cryptomeria japonica) as treated by two-step semi-flow hot-compressed water (1st stage: 230 °C/10 MPa/15 min, 2nd stage: 270 °C/10 MPa/15 min), water-soluble portion, precipitate, and water-insoluble residue obtained by hot-compressed water treatment were separated and characterized. Consequently, the water-soluble portion was found to contain lignin-derived monomeric compounds such as coniferyl alcohol and coniferyl aldehyde and β-1, β-5, and 5-5′ linked dimeric compounds. These lignin-derived compounds maintained methoxyl and phenolic hydroxyl groups in aromatic rings. The water-soluble portion also contained lignin-derived oligomeric compounds up to heptamers. In contrast, the precipitate was found out to consist of higher molecular weight lignin with high ether type linkages. The water-insoluble residue, however, consisted mostly of lignin with high condensed type linkages. Based on these lines of evidence, condensed type lignin must be resistant to hot-compressed water and remain as water-insoluble residue after two-step treatment. Such information provides a clue as to efficient utilization of lignin-derived products. |
著作権等: | The final publication is available at Springer via http://dx.doi.org/10.1007/s10086-015-1464-0. The full-text file will be made open to the public on 13 February 2016 in accordance with publisher's 'Terms and Conditions for Self-Archiving' この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。 This is not the published version. Please cite only the published version. |
URI: | http://hdl.handle.net/2433/201513 |
DOI(出版社版): | 10.1007/s10086-015-1464-0 |
出現コレクション: | 学術雑誌掲載論文等 |
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