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Optimizing chemical wood modification with oligomeric lactic acid by screening of processing conditions

Grosse C., Grigsby W.J., Noël M., Treu A., Thévenon M.F., Gerardin P.. 2019. Journal of Wood Chemistry and Technology, 39 (6) : p. 385-398.

When exposed to moisture, wood undergoes swelling and is susceptible to fungal degradation. Chemical modification via oligomeric lactic acid (OLA) treatment has been found to be a promising environmentally friendly solution to this disadvantage. In this study, wood was impregnated with OLA and then variously heat treated to polymerize the OLA in situ. The effect of curing temperature and time on OLA polymerization has been determined chemically. Dimensional stability was examined by water immersion and hygroscopicity measurements and biological decay resistance also evaluated. OLA impregnation followed by heat treatment enhanced wood properties. OLA cure at 160 _C for 48 h resulted in treated wood with greater dimensional stability and biological resistance.

Mots-clés : résistance aux organismes nuisibles; polymérisation; traitement thermique; acide lactique; produit de préservation du bois; bois; fagus sylvatica; suisse

Thématique : Technologie des produits forestiers

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