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Color changes and accelerated ageing in oak wood treated with ammonia gas and iron nanoparticles
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SYSNO ASEP 0503925 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Color changes and accelerated ageing in oak wood treated with ammonia gas and iron nanoparticles Author(s) Machová, Dita (UTAM-F) RID, ORCID, SAI
Baar, J. (CZ)
Paschová, Z. (CZ)
Pařil, P. (CZ)
Křenková, Jana (UIACH-O) RID, ORCID
Kúdela, J. (SK)Number of authors 6 Source Title European Journal of Wood and Wood Products. - : Springer - ISSN 0018-3768
Roč. 77, č. 4 (2019), s. 705-716Number of pages 12 s. Publication form Print - P Language eng - English Country DE - Germany Keywords oak wood ; color modifying procedure ; color stability Subject RIV JK - Corrosion ; Surface Treatment of Materials OECD category Coating and films Subject RIV - cooperation Institute of Analytical Chemistry - Analytical Chemistry, Separation Method of publishing Limited access Institutional support UTAM-F - RVO:68378297 ; UIACH-O - RVO:68081715 UT WOS 000471701800019 EID SCOPUS 85064488788 DOI 10.1007/s00107-019-01406-x Annotation The aim was to evaluate the oak wood discoloration after ammonification and after alternative treatment by iron nanoparticles, the effect of extractive content on this color change, and the color stability of the treated wood during weathering. Alterations in the color space CIEL*a*b*of the modified oak wood were evaluated and the values were compared with the color spaces of untreated recent and subfossil oak wood. The results demonstrate noticeable color darkening for both treatments. The a* and b* values in the wood modified with ammonium were also reduced. For both treatments, a significant correlation was found between the extractive content and the overall color change. Additionally, the color stability of the modified oak wood during accelerated ageing under diverse external conditions was studied. The color change caused by the artificial conditions was measured on modified oak heartwood samples and the values were compared with the color stability of recent and subfossil oak wood. The results demonstrate that all the test specimen sets underwent photodegradation. The best color stability in the dry mode was attained with the ammonium-modified wood and the maximum impact of weathering was detected for the iron nanoparticles treatment during the wet mode. Workplace Institute of Theoretical and Applied Mechanics Contact Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Year of Publishing 2020 Electronic address https://doi.org/10.1007/s00107-019-01406-x
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