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Characterization of lignin-derived products from Japanese cedar as treated by semi-flow hot-compressed water
| Content Provider | Semantic Scholar |
|---|---|
| Author | Takada, Masatsugu Saka, S. S. Saka |
| Copyright Year | 2015 |
| Abstract | 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. |
| Starting Page | 299 |
| Ending Page | 307 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/s10086-015-1464-0 |
| Alternate Webpage(s) | https://repository.kulib.kyoto-u.ac.jp/dspace/bitstream/2433/201513/1/s10086-015-1464-0.pdf |
| Alternate Webpage(s) | https://doi.org/10.1007/s10086-015-1464-0 |
| Volume Number | 61 |
| Journal | Journal of Wood Science |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
