Chemical Modification of Wood
Transcript of Chemical Modification of Wood
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Chemical Modification of Wood
ACCOYA TECHNOLOGY
Presentation by Prof. George Mantanis
Special thanks to Mr. Victor Vos, TitanWood SA
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Modified wood: solid wood that has quite improved physical and moisture properties!
How can this be achieved?
- use of thermal treatment and/or
- use of green chemical additives
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What improved properties?
a. Very low swelling & shrinking properties
b. High resistance to weathering and UV radiation
c. High natural durability (over 30 years)
d. Resistance to biological degradation (fungi, insects)
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History
Tarkow (1945), Stamm (1947) & Rowell (1985-2005)
Acetylation of wood – technology is named Accoya®
* By this technology, wood is chemically modified, under specific conditions, thus improving and upgrading wood species, like spruce, beech, Oregon pine, poplar
* Modified wood holds an ecological label and is characterized by unique physical properties.
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chemical reaction: acetylation
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Lab and field trials
- According to std. EN 350 «Class 1»
- Natural durability as that of Teak wood
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Biological resistance
0.90
0.75
0.60
0.45
0.30
0.15
0.00
Βαθμός ακετυλίωσης [%]
Coniophora Gloeophyllum Coriolus Poria Serpula
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High resistance to UV radiation
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Outdoor decking
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Window frames
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cladding
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Finger-jointed wood
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finger-jointing
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windows
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doors &
windows
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Projects
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Outdoor wooden constructions (Holland)
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Wood cladding
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fences
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wooden bridges
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Applications of Accoya wood in Greececooperation project with industry AtlasWood SA
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Use of Accoya in a Greek island
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Thanks for
your attention!