Influence of water and humidity on wood modification with lactic acid

Charlotte Grosse*, Marion Noël, Marie France Thévenon, Lauri Rautkari, Philippe Gérardin

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)
155 Downloads (Pure)


Impregnation of dry wood with pure lactic acid oligomers (OLAs) followed by heat treatment confers promising properties to wood because of OLA's good diffusion, in-situ polymerization and persistence in cell walls. Treatment provides drastic reduction of the equilibrium moisture content, high dimensional stability and good durability. The presence of water during treatment has been evaluated. Curing of OLA impregnated dry wood in humid atmosphere leads to a strong and global degradation of the material. OLA treatment of wet wood only impacts the water leaching rate negatively. Treatment of dry wood with OLA diluted in water additionally decreases the biological resistance and is not efficient for decreasing hygroscopicity. Treatment of dry wood with lactic acid solution leads to a lower polymerization level but confers good properties.

Original languageEnglish
Pages (from-to)259-269
Number of pages11
JournalJournal of Renewable Materials
Issue number3
Publication statusPublished - 1 Apr 2018
MoE publication typeA1 Journal article-refereed


  • Heat treatment
  • Lactic acid
  • Wood impregnation
  • Wood modification


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