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Characterization of the precipitated lignin from Japanese beech as treated by semi-flow hot-compressed water
| Content Provider | Scilit |
|---|---|
| Author | Takada, Masatsugu Minami, Eiji Yamauchi, Kazuchika Kawamoto, Haruo Saka, Shiro |
| Copyright Year | 2017 |
| Abstract | Japanese beech (Fagus crenata) was decomposed by a semi-flow process in hot-compressed water (HCW) at 150~230°C/10 MPa for 25 min. Mainly hemicelluloses and partly the lignin moiety of the wood was affected and liquefied in water. A part of the liquefied products can be precipitated after 12 h standing at ambient conditions. The precipitates are composed of around 90% of lignin, which was quantified and characterized by various chemical and spectroscopic methods in comparison of milled wood lignin (MWL), which is considered to be a representative compound for the native lignin in wood. The yield of the precipitated lignin (Lprecip) is higher than that of MWL and its syringyl content is also higher as demonstrated by alkaline nitrobenzene oxidation (NBO) giving rise to higher syringaldehyde/vanillin (SA/VA) ratios. Its OHphen group content was also high. The interpretation is that Lprecip is mainly from the secondary wall, and accordingly, the presented semi-flow HCW treatment offers the possibility for an efficient lignin isolation. |
| Related Links | http://www.degruyter.com/downloadpdf/j/hfsg.2017.71.issue-4/hf-2016-0139/hf-2016-0139.xml |
| Ending Page | 290 |
| Page Count | 6 |
| Starting Page | 285 |
| ISSN | 00183830 |
| e-ISSN | 1437434X |
| DOI | 10.1515/hf-2016-0139 |
| Journal | Holzforschung |
| Issue Number | 4 |
| Volume Number | 71 |
| Language | English |
| Publisher | Walter de Gruyter GmbH |
| Publisher Date | 2017-01-20 |
| Access Restriction | Open |
| Subject Keyword | Holzforschung Paper and Wood Fiber Secondary Wall Japanese Beech Milled Wood Lignin (mwl) Precipitated Lignin Semi-flow Hot-compressed Water Journal: Holzforschung, Vol- 71 |
| Content Type | Text |
| Resource Type | Article |
| Subject | Biomaterials |
