Mineralization of European oak with various ionic salt solutions to achieve an in situ precipitation of calcium oxalate

Franke, Tom; Volkmer, Thomas (2019). Mineralization of European oak with various ionic salt solutions to achieve an in situ precipitation of calcium oxalate In: IRG50 Scientific Conference on Wood Protection. Proceedings IRG Annual Meeting (pp. 1-12). Stockholm, Sweden: The International Research Group on Wood Protection IRG/WP

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Thin specimens of European oak (Quercus spp.) with the dimensions of 4 x 20 x 50 mm3 were treated with various aqueous ionic salt solutions of calcium chloride, potassium oxalate and calcium acetate. Additionally, the oak was treated with combinations of calcium chloride and potassium oxalate, as well as calcium acetate and potassium oxalate with the aim to precipitate in situ the water insoluble salt calcium oxalate. The specimens were impregnated in an autoclave under pressure with the single compounds, as well in combinations in a two-step process, successively. The treatability of the oak was determined by means of the bulking coefficient and due to segment electron microscopy investigations. Possible precipitation to calcium oxalate in situ in oak was determined by ATR-FTIR measurements and a changing moisture uptake after the two-step impregnation serves as a further indicator for a calcium oxalate precipitation. The study shows, that thin oak lamellas can be impregnated with the investigated solutions and additionally, the data obtained in this study indicating that there is an in situ precipitation to the wanted water insoluble salt calcium oxalate and the corresponding by-product.

Item Type:	Conference or Workshop Item (Paper)
Division/Institute:	School of Architecture, Wood and Civil Engineering School of Architecture, Wood and Civil Engineering > Institute for Materials and Wood Technology School of Architecture, Wood and Civil Engineering > Institute for Materials and Wood Technology > Wood Modification BFH Centres and strategic thematic fields > BFH Centre for Wood - Resource and Material
Name:	Franke, Tom and Volkmer, Thomas
Subjects:	T Technology > T Technology (General) T Technology > TH Building construction T Technology > TP Chemical technology T Technology > TS Manufactures
ISSN:	2000-8953
Series:	Proceedings IRG Annual Meeting
Publisher:	The International Research Group on Wood Protection IRG/WP
Language:	English
Submitter:	Christelle Ganne-Chédeville
Date Deposited:	03 May 2021 14:34
Last Modified:	03 May 2021 14:34
Uncontrolled Keywords:	impregnation modification wood mineralization wood modification
ARBOR DOI:	10.24451/arbor.14720
URI:	https://arbor.bfh.ch/id/eprint/14720