Mineralization treatment of European oak heartwood with calcium oxalate for improved fire retardancy

Franke, Tom; Volkmer, Thomas (2021). Mineralization treatment of European oak heartwood with calcium oxalate for improved fire retardancy Holzforschung, pp. 1-12. De Gruyter https://doi.org/10.1515/hf-2021-0055

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Within the focus to apply substances for wood protections, here fire retardants, with low hazardous and low environmental impact is of interest. Additionally, European oak is an attractive species for various interior and exterior applications. However, oak is classified as very heavily treatable and thus impregnation is challenging. However, the focus of this study was to treat European oak with a new fire retardant based on an in-situ calcium oxalate deposition. Thin oak specimens with a thickness of 4 mm were investigated with two various formulations of aqueous salt solutions (potassium oxalate and calcium chloride, and potassium oxalate and calcium acetate) to obtain an in-situ mineralization of calcium oxalate during a two-step impregnation process. The uptake, the distribution, and the penetration of the salts for both applied formulations were investigated. Additionally, fire retardant properties were investigated in a single flame source test. It could be demonstrated that an acceptable degree of treatability was achieved for both applied formulations. The fire retardancy of the so mineralized material was clearly improved. Synergetic effects which might be caused by the reaction side products of the various formulations were found to be neglectable.

Item Type:	Journal Article (Original Article)
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 Chemistry School of Architecture, Wood and Civil Engineering > Institute for Materials and Wood Technology > Wood Modification School of Architecture, Wood and Civil Engineering > Institute for Materials and Wood Technology > Material Emissions School of Architecture, Wood and Civil Engineering > Institute for Materials and Wood Technology > Surface Treatment School of Architecture, Wood and Civil Engineering > Institute for Materials and Wood Technology > Polymer Chemistry School of Architecture, Wood and Civil Engineering > Institute for Materials and Wood Technology > Composite Materials School of Architecture, Wood and Civil Engineering > Institut for Building Materials and Biobased Products IBBM School of Architecture, Wood and Civil Engineering > Institut for Building Materials and Biobased Products IBBM > Biopolymers and Wood Chemistry group FGBH School of Architecture, Wood and Civil Engineering > Institut for Building Materials and Biobased Products IBBM > Wood Modification and Gluing Technology group FGHV School of Architecture, Wood and Civil Engineering > Institut for Building Materials and Biobased Products IBBM > Materials and Life Cycle Assessment group FGWO
Name:	Franke, Tom and Volkmer, Thomas
Subjects:	T Technology > T Technology (General) T Technology > TP Chemical technology
ISSN:	1437-434X
Publisher:	De Gruyter
Language:	English
Submitter:	Corinne Amstutz Hugi
Date Deposited:	14 Jan 2022 09:06
Last Modified:	04 Dec 2023 14:40
Publisher DOI:	https://doi.org/10.1515/hf-2021-0055
ARBOR DOI:	10.24451/arbor.16162
URI:	https://arbor.bfh.ch/id/eprint/16162