The impact of vacuum pressure on the effectiveness of SiO2 impregnation of spruce wood

Abstract Wood is a widely used construction material that has many advantageous properties. However, it suffers from weaknesses such as low-dimensional stability and low durability in humid environments. These issues are associated with the porous vascular structure of wood leads to high water uptake capacity. This research aims reduce capacity spruce by dip-coating samples an aqueous colloid silicon dioxide (SiO 2 ) nanoparticles. SiO dense ceramic good chemical stability. It readily available affordable, making excellent candidate for this application. study investigates effect impregnation on physico-mechanical properties wood. Density measurements, tests, microscopy examination, thermogravimetric analysis, dynamic mechanical analysis were conducted non-treated -treated samples. Quantitative qualitative analyses demonstrated performed under higher vacuum pressure was more effective compared atmospheric condition exhibited greater presence wood’s system. increase density also reduced porosity, which led significant reduction The viscoelastic revealed conditions triggered two different reinforcing mechanisms. results showed improvement storage loss moduli could be achieved when at highest ? 90 kPa.