The carbonization treatment of poplar wood changed its water absorption mechanism. As the processing temperature increases, the highly hygroscopic hemicellulose degrades during the processing, producing substances such as furfural, leading to a decrease in the hygroscopicity of poplar wood. The hydrogen bonding between water molecules and poplar wood molecules is reduced, greatly reducing the moisture absorption and water absorption of poplar wood. Compared with untreated poplar wood, the equilibrium water content of carbonized poplar edge glude panels can be reduced by more than 40%. When carbonized poplar edge glued panels are used at room temperature, their moisture content is usually around 6%.
Due to the carbonization process reducing the concentration of hydroxyl groups in the wood components of poplar, the moisture absorption and internal stress of poplar are reduced. As a result, the exchange ability of carbonized poplar edge glued panels with external water is significantly reduced, greatly reducing the moisture content of poplar. Deformation and cracking caused by changes in moisture during use.
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