1994 Fiscal Year Final Research Report Summary
Studies of Multi-Functional Wood Boron-compounds Composites.
| Project/Area Number |
05454087
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
林産学
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| Research Institution | Niigata University |
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Principal Investigator |
TANIGUCHI Takashi Niigata University, Education Professor, 教育学部, 教授 (20126428)
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| Co-Investigator(Kenkyū-buntansha) |
MISHIRO Yoshiaki Niigata University, Agriculture Asociate Professor, 農学部, 助教授 (90012004)
YASHIRO Makoto Niigata University.Agriculture Professor, 農学部, 教授 (00018532)
OKAMURA Keizou Kyoto University, Agriculture Professor, 農学部, 教授 (50026506)
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| Project Period (FY) |
1993 – 1994
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| Keywords | Wood Inorganic-Compounds Composite / Wood Boron-Compounds Composite / Wood Boron-Oxide Composite / Mechanical Properties / Burning Resistance |
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| Research Abstract |
This study was investigated for getting the multi functional wood boron-compounds composite by simple single operation during two years. The results are as follows.
1) It has been found that boron-oxide is slightly soluble in water, but is soluble in mono-alcohol. As a results, the wood boron-oxide compositewas obtained by impregnating metylalcohol with boron-oxide into wood.
2) It was found by scanning electron microscopy (SEM) and X-ray microanalyzer that the boron-oxide in wood cell existed chiefly in wood cell walls. And, the chemical structure of the boron-oxide in wood cell wallwas estimated to be ester-linkage by X-ray diffraction analysis.
3) The apparent density of the spruce-wood boron-oxide composite (SW-B-C) contained with 20% boron-oxide was 0.56 g/cm^3. This composite is an ideal one, because it is slightly changeable on its weight as compared with the density of untreated spruce wood (0.51 g/cm^3). And, on its mechanical properties, the compression strength and the bending strengthof SW-B-C contained with 20% boron oxide were espectively 2 times and 1.5 times those of untreated spruce wood.
4) On the burnning resistance, the thin SW-B-C board (2 mm thickness) with 20% boron-oxide content did not burn until about 355ﾟC.On the other hand, untreated spruce wood of the same thickness burned atabout 250ﾟC.It was appeared that these wood boron-oxide conposites had the posibility to satisfy the burning resistance level of the incom-bustible material II.
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