| Project/Area Number |
13660154
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | HOKKAIDO UNIVERSITY |
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Principal Investigator |
FUJIWARA Masashi Hokkaido Univ., Grad. School of Eng., Inst., 大学院・工学研究科, 助手 (30229075)
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| Co-Investigator(Kenkyū-buntansha) |
SANO Yoshihiro Hokkaido Univ., Grad. School of Agric., Pro., 大学院・農学研究科, 教授 (10001463)
ERATA Tomoki Hokkaido Univ., Grad. School of Eng., Asso. Pro., 大学院・工学研究科, 助教授 (30213581)
TAKAI Mitsuo Hokkaido Univ., Grad. School of Eng., Pro., 大学院・工学研究科, 教授 (50002019)
高谷 典良 北海道立林産試験場, 技術部合板科, 科長
TAKAYA Yoshinori Hokkaido Forest Products Res. Inst., Manager
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| Project Period (FY) |
2001 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2002: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2001: ¥2,500,000 (Direct Cost: ¥2,500,000)
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| Keywords | lignin / doping / electron acceptor / iodine / semiconductor / heat generation / plane heater / phenol resin / 温度特性 |
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| Research Abstract |
Lignin, one of the major component in woods, is a electrically nonconductor. However, a semiconductivity lignin was obtained when doping with electron aceeptor, such as iodine, iodine bromide or iron trichloride. Higher semiconductivity was achieved when lignin was mixed with electron acceptor in solution. By the measuremeht of UV spectrum, the occurrence of semiconductivity in the iodine-doped lignin was considered to be attributed to the formation of charge-transfer colmplex between lignin and iodine. From the IR spectra and the differential UV spectra, the high conductivity in the iodine-doped lignin was euggested tp be due to the increasement of the effective conjugate length in lignin. The conductivity in the iodine-doped lignin decreased as the heating temperature of pre-treatment of lignin increased. The iodine-doped lignin (wt ratio of Lig. : Iod., 1:4) with phenol resin was found to generate heat when applying an alternating-current electricity The heat generating property of lignin was affected by the sort of the resin used. The rising temperature of the iodine-doped lignin reached the peak and its temperature gradually decreased.
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