Effect of combined aluminum-silicon synergistic impregnation and heat treatment on the thermal stability, chemical components, and morphology of wood

Abstract

Wood is flammable and consumes a lot of energy during processing. To improve this material, wood was pretreated via aluminum sulfate–sodium silicate synergistic impregnation combined with heat treatment. The wood before and after pretreatment was analyzed through the solids weight changes, thermogravimetric and differential thermogravimetric analyses, somke density, scanning electron microscopy, and Fourier-transform infrared spectroscopy. The experimental results showed that the combined treatment could reduce the energy consumption of the heat treatment by catalyzed thermal degradation with aluminum-silicon synergistic impregnation. This procedure improved the thermal stability of the wood. Meanwhile, the combined treatment resolved the problem of increased smoke release caused by the impregnation of aluminum sulfate–sodium silicate modification reagents.

Effects of thermal treatment on the dimensional stability and chemical constituents of new and aged camphorwood

“…The MPL is the main metric to follow the quality of thermally treated wood, and it explains the degree of pyrolysis of small molecular components such as hemicellulose (Qu et al 2019;Mania et al 2020). The MPL values depend on heating medium, wood varieties, treatment duration, and temperature (Esteves and Pereira 2009).…”

“…Comparison of the FTIR spectra reveals a noticeable decrease of IR-band intensities at approximately 3340 cm −1 that correspond to −OH stretching. Thermal treatment reduces the relative number of hydroxyl groups (He et al 2019), thus improving the dimensional stability of the wood. Figure 2 displays FTIR spectra of treated and control samples within 800 to 1800 cm -1 for 2.5 h treatment at 120, 150, or 180 °C.…”

Synthesis of a vanillin‐based curing agent and its application in wood to improve dimensional stability and flame retardancy

“…In recent years, the use of biomimetic design and nanotechnology for flame retardant treatment of wood has developed rapidly. For example, wood treatment with hybrid nanoparticles consisting of layered silicate, 4 carbon nanomaterials, 6 epsomite, 7 melamine/phosphoric acid, 8 and aluminum sulfate 9 can effectively produce impregnated reinforced wood with good thermal stability and fire resistance. But the main obstacle in these nanoparticle materials application is from the production cost, besides, the unsatisfactory dimensional stability and durability also limit its application range 10 .…”

Characterization and identification of wooden rice bucket made in 1860s

“…Wood culture is deeply rooted in the soul and is one of the most representative cultural heritages in ancient China, transmitted through generations (Xie et al 2015;Liu et al 2019;Yin and Liu 2021). In ancient China, most furniture, houses, and tableware were made of wood (Qu et al 2019;Sun et al 2022), and wooden objects from ancient civilizations were considered precious and needed careful storage and study, as they were susceptible to fungi, bacteria, insects, and also different physical agents (Popescu et al 2007;Fabri 2012;Popescu et al 2013;Pop et al 2020). It is also important to learn and study the manufacturing technique of these special old objects.…”