Novel wooden structural material with stable durability and preparation method of novel wooden structural material

Abstract

The invention discloses a novel wooden structural material with stable durability and a preparation method of the novel wooden structural material and belongs to the technical field of wood protectionand modification. The novel wooden structural material with the stable durability comprises a protective outer shell formed through surface layer heat modification and a core layer. The core layer isa supporting skeleton with a temperature stagnant zone formed through process controlling in the preparing process. The preparation method of the novel wooden structural material with the stable durability comprises the steps that firstly, a wood is sawed and planed, then, the wood is dried, the moisture content of the wood is controlled, by means of a process method, a moisture gradient is formed between the wood surface layer and the core layer, a plate type hot press is used for carrying out heating treatment on the wood surface, the temperature of the core layer is controlled in the heating process, and finally, wet-conditioning treatment is carried out on the wood. The novel wooden structural material with the stable durability and the preparation method of the novel wooden structural material have the main beneficial effects that by means of scientific control over the initial moisture content level and the internal moisture content gradient of the wood and by adjusting the temperature rising rate of the wood surface layer and the core layer, the temperature stagnation area not formed through a conventional process is formed on the core layer, and the mechanical strength ofthe novel wooden structural material is not affected while the size stability of the wood is improved.

Description

technical field [0001] The invention relates to the technical field of wood protection and modification, and more specifically relates to a novel stable and durable wood structural material and a preparation method thereof. Background technique [0002] Wood is a widely used biomass material, which has the advantages of high strength-to-weight ratio and beautiful color and texture. However, wood is easily attacked by fungi and insects. When it is damp, it will absorb water and swell, deform or even crack. Constraints. Wood heat treatment, also known as wood heat modification, is an effective way to improve the dimensional stability and biological durability of wood. It heats the wood at a temperature of about 200 ° C to degrade the hemicellulose in the wood. The hydrophilic groups mainly exist in hemicellulose, so the number of hydrophilic groups in wood decreases after hemicellulose is degraded, which reduces the binding ability of wood and water and improves the dimension...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the disadvantages of the prior art that the internal temperature of the wood rises too fast, it is difficult to control the internal temperature, and the strength of the wood decreases significantly, and prepares a new type of wood through the scientific setting of the initial moisture content level of the wood and the gradient of the internal moisture content. The wooden structural material solves the above-mentioned problems of the prior art

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