Importance of beech wood pre-treatment for impregnation with mimosa tannin extract

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F19%3A43916939" target="_blank" >RIV/62156489:43410/19:43916939 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Importance of beech wood pre-treatment for impregnation with mimosa tannin extract
Original language description
In this paper, the effect of beech wood pre-treatment on the industrial tannin extract fixation efficiency after vacuum impregnation, was investigated. The temperature of wood drying was set at 60oC for 24hours till reaching the moisture equilibrium (i.e. for those conditions) in order to eliminate thermal degradation of wood and of implemented tannin; and moreover to keep bridges via water molecules present deeply in wooden matrix for connection with newly created bonding sites. Samples were immersed under water for 12hours. Water, as a polar solvent, decreased the content of in wood present small molecules, e.g. broken-down parts of hemicelluloses, non-bonded water-soluble extractives at 60oC to even higher extend than at ambient temperature (0.49mg vs. 0.23mg glucose equivalent per 1g of dried wood). This free space was shown to be advantageous for direct reaction of tannin with wooden polymers, since tannins can bond with carbohydrates; and slightly improved leaching resistance was also observed. However, in case of waterborne protection development without hardeners addition, better fixation conditions have to be established.
Czech name
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Czech description
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Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Wood Science and Engineering in the Third Millenium: Proceedings of the International Conference (ICWSE 2019)
ISBN
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ISSN
1843-2689
e-ISSN
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Number of pages
4
Pages from-to
391-394
Publisher name
Universitatea Transilvania din Brasov
Place of publication
Brasov
Event location
Brašov
Event date
Nov 7, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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