Effects of water glass, silane and DMDHEU treatment on the colonisation of wood by sapstaining fungi

The objective of this study was the investigation of the resistance of modified
wood against sapstaining fungi and the investigation of the influences of fungal
growth. Specimens of Scots pine sapwood (Pinus sylvestris L.) and Beech wood
(Fagus sylvatica L.) were investigated after being treated with an amino-alkylfunctional
oligomeric siloxane, a sodium water glass solution and 1,3-dimethylol-
4,5-dihydroxyethylene urea (DMDHEU).
The following is a structured outline of this study:
Laboratory tests for the resistance against the blue stain fungus
Aureobasidium pullulans
The objective was to develop a laboratory test method against blue stain for
modified wood as well as the determination of the resistance against blue stain.
After definition of a suitable test method, the laboratory tests displayed an
improved resistance against blue stain for all tested modified wood specimens.
Regardless of the wood species, the fungal infestation was reduced but not
inhibited. Among the treated specimens, the water glass treated specimens
showed the lowest, the siloxane treated specimens the highest infestation
respectively.