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Topochemical analyses of furfuryl alcohol-modified radiata pine (Pinus radiata) by UMSP, light microscopy and SEM
Technical University of Munich, Germany.
RISE - Research Institutes of Sweden, Bioeconomy, Biobased Materials. Technical University of Munich, Germany.
Thunene Institute of Wood Research, Gemany.
Technical University of Munich, Germany.
2017 (English)In: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 71, no 10, p. 821-831Article in journal (Refereed) Published
Abstract [en]

Furfurylation is one of the wood modification techniques via catalytic polymerization of the monomeric furfuryl alcohol (FA) in the impregnated cell wall. Little is known about the topochemistry of this process. Brown rot degradation begins with lignin modification and therefore, the reactions between FA and lignin was one focus of this research. Furfurylated radiata pine (Pinus radiata) with three different weight percent gains (WPGs of 57%, 60% and 70%) after FA uptake was observed by cellular ultraviolet microspectrophotometry (UMSP) to analyze chemical alterations of the individual cell wall layers. Moreover, light microscopy (LM) and scanning electron microscopy (SEM) analyses were performed. The ultraviolet (UV) absorbance of the modified samples increased significantly compared to the untreated controls, indicating a strong polymerization of the aromatic compounds. Highest UV absorbances were found in areas with the highest lignin concentration. The UMSP images of individual cell wall layers support the hypothesis concerning condensation reactions between lignin and FA.

Place, publisher, year, edition, pages
2017. Vol. 71, no 10, p. 821-831
Keyword [en]
brown rot, furfurylation, light microscopy (LM), lignin modification, scanning electron microscopy (SEM), ultraviolet microspectrophotometry (UMSP), wood modification, Chemical analysis, Condensation reactions, Electron microscopy, Forestry, Lignin, Polymerization, Scanning electron microscopy, Ultraviolet spectrophotometers, Lignin modifications, Ultraviolet microspectrophotometry, Wood, Concentration, Condensation, Lignins, Pinus Radiata
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-33149DOI: 10.1515/hf-2016-0219Scopus ID: 2-s2.0-85030689667OAI: oai:DiVA.org:ri-33149DiVA: diva2:1178966
Available from: 2018-01-31 Created: 2018-01-31 Last updated: 2018-01-31Bibliographically approved

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CiteExportLink to record
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