Treatment method of enhancing wood performance by quick dense carbonization

Abstract

The invention relates to a treatment method of enhancing wood performance by quick dense carbonization. The treatment method comprises the following steps: (1) drying wood; and (2) placing the wood toa stainless steel electric heating plate, placing a perforated metal plate on the wood, heating, pressing and compacting the wood, wherein the compaction ratio of the wood is controlled at 6-25%, keeping the pressure state for thermal treatment for 1-30 min, and cooling and depressurizing the wood to obtain the dense carbonization enhanced wood. According to the treatment method provided by the invention, compact densification of the wood is achieved while the wood is carbonized, and the density of the wood is increased, so that the surface hardness and the bending strength of wood are enhanced, that is, the mechanical properties of the wood are improved.

Description

technical field [0001] The invention belongs to the field of wood treatment, and in particular relates to a treatment method for rapid dense carbonization to enhance wood properties. Background technique [0002] Due to the shortage of wood resources, the wood industry is increasingly dependent on fast-growing wood and young wood. However, there are many natural defects in fast-growing wood and juvenile wood: there are more free hydroxyl groups and some polar functional groups and capillaries in the cell wall, so that both gaseous water and liquid water can easily enter the wood, resulting in wood processing. During use, the dimensional stability of the wood is poor due to moisture absorption or desorption, and the durability is poor due to moisture intrusion; at the same time, the wood is prone to cracking, warping, deformation, decay, and mildew. For this reason, the wood processing industry has been looking for high-efficiency, low-cost, sustainable and effective wood pr...

AI Technical Summary

Problems solved by technology

However, there are many natural defects in fast-growing wood and juvenile wood: there are more free hydroxyl groups and some polar functional groups and capillaries in the cell wall, so that no matter whether it is gaseous water or liquid water, it can easily enter the wood, resulting in wood processing. During use, the dimensional stability of the wood is poor due to moisture absorption or desorption, and the durability is poor due to moisture intrusion; at the same time, the wood is prone to cracking, warping, and is easy to rot and mildew

These carbonization treatment methods have large investment in process equipment, long production cycle (generally at least 48 hours), complex carbonization process, high production cost, large heat energy consumption, high risk, and a large amount of volatiles produced during wood carbonization will be mixed in steam. air pollution

At the same time, the defects of wood in the carbonization process are also more serious, such as knots falling off, deformation, cracking, spacer discoloration, color difference, etc.; after carbonization by these methods, the wood density, bending strength, impact toughness and nail holding power Reduced, affecting the performance of wood

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