Effect of weathering on surface functional groups of charred norway spruce cladding panels

Maija Kymäläinen*, Hannu Turunen, Lauri Rautkari

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Norway spruce cladding panels were surface charred with a prototype device utilizing a hot plate method. The panels were used to construct a test wall that was exposed to natural weathering for a period of two years. The changes in functional groups were evaluated with photoacoustic FTIR spectroscopy. The analysis revealed degradation of the thermally modified lignin component, indicating poor stability in weathering. Improvements in the prototype device process conditions, such as increased surface pressure and slower feed speed, and future research needs regarding surface charred wood are discussed.

Original languageEnglish
Article number1373
Pages (from-to)1-9
Number of pages9
JournalForests
Volume11
Issue number12
DOIs
Publication statusPublished - Dec 2020
MoE publication typeA1 Journal article-refereed

Keywords

  • Char
  • Claddings
  • Surface modification
  • Weathering
  • Wood

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