Elucidation of cause of acetaldehyde emission from glued-laminated timbers bonded with phenol-resorcinol-formaldehyde (PRF) adhesives
| Project/Area Number |
16380122
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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 |
林産科学・木質工学
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| Research Institution | Forestry and Forest Products Research Institute |
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Principal Investigator |
TOHMURA Shin-ichiro Forestry and Forest Products Research Institute, Department of Wood-based Material, Senior Researcher, 複合材料研究領域, 主任研究官 (70353779)
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| Co-Investigator(Kenkyū-buntansha) |
INOUE Akio Forestry and Forest Products Research Institute, Department of Wood-based Material, Head, 複合材料研究領域, 室長 (10353591)
MIYAMOTO Kohta Forestry and Forest Products Research Institute, Department of Wood-based Material, Researcher, 複合材料研究領域, 研究員 (70353878)
OHIRA Tatsuro Forestry and Forest Products Research Institute, Department of Forest Chemistry, Head, 樹木化学研究領域, 室長 (40353619)
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| Project Period (FY) |
2004 – 2005
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| Project Status |
Completed (Fiscal Year 2005)
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| Budget Amount *help |
¥9,300,000 (Direct Cost: ¥9,300,000)
Fiscal Year 2005: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2004: ¥7,000,000 (Direct Cost: ¥7,000,000)
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| Keywords | Acetaldehyde / VOC / Wood-based material / Adhesives / Ethanol / Emission / Glued-laminated timber / Wood |
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| Research Abstract |
Acetaldehyde is a volatile organic compounds (VOC) which is thought to cause sick building syndrome. Recently there have been multiple reports in which an extraordinary amount of acetaldehyde emission (600〜1500 μg/m^2h) from glued-laminated timbers bonded with phenol-resorcinol-formaldehyde (PRF) resin adhesives was measured using small chamber methods. These values are much higher than the natural acetaldehyde emission from wood. This study examined the effect of PRF type, pressing condition and wood species on the acetaldehyde emission from glued-laminated timbers using the small chamber method. As a result, extraordinary amounts of acetaldehyde, such as an emission factor of 200-1000μg/m^2h, were observed after one day in the case of glued-laminated timber using ethanol-PRF resin. These phenomena were generally independent of the specxies and pressing condition. In addition, the interactions between ethanol and various materials such as wood, filter paper, and glass were investigated. We found that acetaldehyde was produced when ethanol was added to the surface of only wood, but not other materials, Therefore, we conclude that the source of the extraordinary acetaldehyde emission froma GL bonded with pRF resin adhesive is ethanol contained in the PRF resin. The production of acetaldehyde appears to be caused by a certain interaction (possibly oxidation) between the ethanol and the wood. Further experiments to elucidate the mechanisms of the acetaldehyde production from ethanol and wood are now being conducted.
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Report
(3 results)
Research Products
(98 results)
