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The potential of citric acid and glucose enhancing the reaction of wood with bicine and tricine
Biotechnical Faculty, University of Ljubljana, Ljubljana, Slovenia.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.ORCID iD: 0000-0003-0869-5858
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.ORCID iD: 0000-0003-0852-5066
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Wood Science and Engineering.ORCID iD: 0000-0002-7711-9267
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2024 (English)In: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280Article in journal (Refereed) Epub ahead of print
Abstract [en]

To improve the resistance of wood to biological decay the Maillard reaction between introduced amines and wood cell-wall polymers can be utilised. However, initial studies in wood modification showed almost complete leaching of bicine and tricine from treated wood and the loss of beneficial effects. The objective of this study was to assess whether possible reactions of bicine or tricine with wood could be further enhanced and reaction products stabilised through the addition of glucose and/or citric acid. Thus, Scots pine sapwood specimens were impregnated with tricine or bicine, with or without glucose and citric acid, and then heated to a temperature of 160°C. The dimensional stability, degree of chemical leaching and mechanical properties were assessed. Overall, it was concluded that neither the presence of glucose nor citric acid did appear to enhance the reactivity of tricine or bicine. Anti-swelling efficiency (ASE) of 50% was observed for combined treatments of bicine/tricine and citric acid but the leaching resistance originated mainly from citric acid and glucose, with no indication for the retention of bicine or tricine. The presence of citric acid led to a strongly reduced modulus of rupture. 

Place, publisher, year, edition, pages
Taylor & Francis, 2024.
Keywords [en]
Maillard reaction, thermal/chemical treatment, mechanical properties, wood modification
National Category
Wood Science
Research subject
Wood Science and Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-105914DOI: 10.1080/17480272.2024.2357632OAI: oai:DiVA.org:ltu-105914DiVA, id: diva2:1866353
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Available from: 2024-06-07 Created: 2024-06-07 Last updated: 2024-06-07

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Scharf, AlexanderLin, Chia-FengKarlsson, OlovSandberg, DickJones, Dennis

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3031323334353633 of 78
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