Fire-retardant properties of wood modified with sorbitol, citric acid and a phosphorous-based system

2023 | journal article. A publication with affiliation to the University of Göttingen.

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​Fire-retardant properties of wood modified with sorbitol, citric acid and a phosphorous-based system​
Kurkowiak, K.; Wu, M.; Emmerich, L. & Militz, H.​ (2023) 
Holzforschung77(1) pp. 38​-44​.​ DOI: https://doi.org/10.1515/hf-2022-0114 

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Authors
Kurkowiak, Katarzyna; Wu, Muting; Emmerich, Lukas; Militz, Holger
Abstract
Abstract Scots pine sapwood ( Pinus sylvestris L.) was modified with an aqueous solution of sorbitol and citric acid (SorCA) and a commercial phosphorus-based fire-retardant (FR). The aim of this study was to assess whether the fire behavior can be improved when the SorCA solution is supplemented by an FR and if this effect is resistant to leaching. The fire behavior of modified wood was investigated by a Bunsen burner ignition test, mass loss calorimetry (MLC) and thermogravimetric analysis (TGA). The results demonstrated a significantly improved fire-retardancy based on a decreased burning rate and a reduced mass loss in the Bunsen burner test. Also, the induced formation of a protective char barrier facilitated by the addition of a FR, reduced the heat release rate and delayed the ignition. The fire-retardant effect was still observed, to the less extent, after a cold-water (EN 84 2020) leaching of the specimens.
Issue Date
2023
Journal
Holzforschung 
Organization
Fakultät für Forstwissenschaften und Waldökologie ; Burckhardt-Institut ; Abteilung Holzbiologie und Holzprodukte 
ISSN
0018-3830
eISSN
1437-434X
Language
English

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