Weathering characteristics of wood treated with water glass, siloxane or DMDHEU

摘要: Specimens of Scots pine sapwood (Pinus sylvestris) and beech wood (Fagus sylvatica) were treated with a sodium water glass solution, an amino-alkyl-functional oligomeric siloxane 1,3-dimethylol-4,5-dihydroxyethylene urea (DMDHEU). The specimens exposed outside without ground contact for 24 months. Colour measurements during exposure showed discoloration all specimen surfaces. FTIR spectroscopy displayed lignin degradation the initial time. Chemical treatments decelerated fungal infestation wood, while their effect on was not discernible. SEM studies revealed that affected by different treatments. untreated radial penetration hyphae through pits. Only superficial no visible at specimens. A significantly reduced exhibited DMDHEU Fungal pits visible.