Contribution of caoutchouc to durability of teak (Tectona grandis L. f.) wood
Country
Malaysia
Description
[Synopsis]
Caoutchouc is present in very small amounts in sapwood, starting from it the central part. It occurs in heartwood parenchyma, especially in ray parenchyma, and in small amounts in fibers and vessel elements. Untreated teak heartwood cuttings showed a high contact angle with water, indicating hydrophobic properties. Extraction with acetone increased the contact angle slightly, due to the removal of polar compounds and redistribution and enrichment of apolar caoutchouc on the surface. X-ray photoelectron spectroscopy confirmed these findings. Reconstituted panels made from ethanol extracted teak heartwood meal were prone to decay. Specimens made from wood meal successively extracted with ethanol and chloroform showed a slightly lower resistance than specimens made from ethanol-extracted one. It is suggested that the high resistance to decay of untreated teak heartwood is due to the synergetic effect of decay active ethanol extracts and non-active caoutchouc.
- Affiliation
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Japan International Research Center for Agricultural Sciences Forestry Division
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Universiti Sains Malaysia
- Classification
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Technical B
- Term of research
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FY1995-1998
- Responsible researcher
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YAMAMOTO Koichi ( Forestry Division )
SIMATUPANG Maruli H. ( Universiti Sains Malaysia )
SULAIMAN D. ( Universiti Sains Malaysia )
Hashim Rokiah ( Universiti Sains Malaysia )
- ほか
- Japanese PDF
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1997_18_A3_ja.pdf1.04 MB