Effect of Combined Aluminum-silicon Synergistic Impregnation and Heat Treatment on the Thermal Stability, Chemical Components, and Morphology of Wood

Lijie Qu, Zhenyu Wang, Jing Qian, Zhengbin He, Songlin Yi


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.


Aluminum sulfate; Heat treatment; Sodium silicate; Smoke density; Thermal stability

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