1999 Fiscal Year Final Research Report Summary
Basic Study on Designing Liquefied Wood for Functional Products
| Project/Area Number |
09460074
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
林産学
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| Research Institution | The University of Tokyo |
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Principal Investigator |
ONO Hirokuni Graduate School of Agricultural and Life Sciences, The University of Tokyo, Professor, 大学院・農学生命科学研究科, 教授 (30261960)
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| Co-Investigator(Kenkyū-buntansha) |
HORI Naruhito Graduate School of Agricultural and Life Sciences, The University of Tokyo, Assistant Professor, 大学院・農学生命科学研究科, 助手 (80313071)
TAKEMURA Akio Graduate School of Agricultural and Life Sciences, The University of Tokyo, Associate Professor, 大学院・農学生命科学研究科, 助教授 (50183455)
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| Project Period (FY) |
1997 – 1999
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| Keywords | Phenol Liquefaction / Ethyleneglycol Liquefaction / wood / Cellulose |
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| Research Abstract |
In order to utilize liquefied products from woody material, its chemical characteristics and composition should be elucidated, which is one of essential prerequisite for designing special polymers. Few studies, however, have been carried out for the characterization of the liquefied products probably because the complexity of component in wood itself. We tried to elucidate the identification of some chemical compounds in liquefied products and liquefaction mechanism by pursuing the liquefaction behavior of Shirakamba (Betula Sap.) as a function of reaction time with phenol and ethylene glycol in a fashion of the authors' patent. As the results, it have been clear that cellulose, the major component of wood, is the least susceptible td liquefaction and the liquefaction of cellulose is rate-determing step to obtain the complete liquefied products.
We, therefore, tried to presume liquefaction mechanism through characterizing cellulose liquefied products. 13C-nuclear magnetic resonance (NMR
… More
) spectrum of acetone and water soluble fraction by successive extraction demonstrated that the presence of phenyl glucoside. The further liquefaction of this fraction with phenol provided compounds without piranose ring structure. The compounds were confirmed to include triphenyl methane and 1, 1, 2 triphenyl ethane by the separation with high performance liquid chromatography (HPLC).
When ethylene glycol was used as liquefaction solvent, ethyleneglycol glucoside was obtained from dioxane and water soluble fraction by successive extraction. Levulinic esters with ethylene glycol and polyethylene glycol were also obtained from doixane, water and chloroform soluble fraction.
These findings have indicated that cellulose is depolymerized as far as glucose through cellooligomer in the initial stage and the glucose is decomposed into levulinic acid in the last stage of the liquefaction. The glucosides and levulinates with liquefaction solvents are considered to be the resultants of glucose and levulinic acid formed in the each stage. The identified chemical species in phenol liquefaction may be the resultants of decomposed phenol levulinate in the drastic reaction. Less
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Research Products
(6 results)
