Effects of an impregnation procedure for prevention of wood cell wall damage due to drying
2001 (English)In: Wood Science and Technology, ISSN 0043-7719, E-ISSN 1432-5225, Vol. 34, no 6, 473-480 p.Article in journal (Refereed) Published
Drying of wood may lead to readily observable macroscale cracks. Recently observations were made indicating that also at the level of cell walls, damage occurs due to drying. A method is presented where green wood is impregnated using a solution of water and a bulking compound such as glycerol. Tensile strength parallel to the grain for wood impregnated in the green state was compared with that for ordinary dried wood and for wood impregnated after drying. Data demonstrate significantly higher strength for wood impregnated in the green state. It is postulated that this is due to damage in the cell walls of non-impregnated wood where the damage is induced by the drying stresses. Support for this hypothesis is also presented in the form of fractography results. For wood impregnated in the green state, damage development during drying is limited. This is because the impregnating chemical (glycerol in the present case) in the cell wall substitutes some of the moisture and therefore limits the drying stresses.
Place, publisher, year, edition, pages
2001. Vol. 34, no 6, 473-480 p.
IdentifiersURN: urn:nbn:se:kth:diva-20448ISI: 000167535000003OAI: oai:DiVA.org:kth-20448DiVA: diva2:339143
QC 201005252010-08-102010-08-10Bibliographically approved