A method of improving the penetration of preservatives in wood

Abstract

The invention relates to a method for improving the penetration of preservatives in wood, comprising the following steps: 1) coating the preservative on the surface of wooden materials for antiseptic treatment; 2) applying high pressure on both sides of the antiseptic treated wooden materials electric field, and the direction of the electric field is perpendicular to the fiber direction of the wooden material, respectively set conductive metal plates on the upper and lower sides of the wooden material, and connect the negative pole of the high-voltage electric field generator to the conductive metal plate above the wooden material, and the positive pole to the The conductive metal plate under the wooden material should be set with a negative voltage not lower than 1kV. In the present invention, by applying a high-voltage electric field in the vertical direction of wood fibers, it not only significantly improves the penetration effect of preservatives in the transverse direction of wood, significantly improves the penetration of wood, but also solves the problems of chemical reagent pollution and high cost caused by modifiers. And it will not cause damage to the internal structure of the wood.

Description

technical field [0001] The invention relates to a method for improving the penetration of preservatives in wood, and belongs to the technical field of wood preservation. Background technique [0002] As a renewable, green and environmentally friendly biomass material, wood is used in new building materials, interior decoration and logistics and transportation. However, because wood is a natural polymer material, it is easily affected by moisture in the surrounding environment. Under the influence of temperature and temperature, deformation and warping occur due to the difference in the internal stress of the wood. At the same time, the interior of the wood is also susceptible to fungal corrosion and moth-eaten phenomena, resulting in the reduction of dimensional stability, the degradation of chemical components, and ultimately the significant reduction in physical and mechanical properties. Therefore, improving the permeability of preservatives in wood materials is one of th...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the modifier is still penetrated into the interior of the wood from the cross section by using the longitudinal cell channel of the wood, and only through the pit effect in the transverse direction of penetration, and there is no obvious innovation in the device and working principle.

First preheat the drying kiln, then preheat the wood, and then carry out the drying step after heating up for 48 hours. After drying, put the wood in a vacuum carbonization tank for carbonization treatment for 48h-72h. This method can reduce the hygroscopicity and Improve the dimensional stability, but the disadvantage is that the carbonization treatment method is cumbersome and time-consuming, and it is easy to increase the production cost. Moreover, the carbonization treatment is mainly concentrated on the surface of the wood, and does not go deep into the interior of the wood, so it cannot improve the overall transparency of the wood. and durability

However, the disadvantage of this method is that in the process of microwave treatment, the influence of steam on the degree of cracks inside the wood is not resolved. Therefore, the internal microstructure of the wood will still be destroyed, so that while improving the permeability of the wood, it is further reduced. mechanical properties of wood

[0012] The aforementioned publication number is the Chinese invention patent of the invention patent CN 104985653A, the publication date is October 21, 2015, which discloses a method for treating wood with a supercritical fluid. The invention includes providing a supercritical fluid and at least one wood preservative Or contact with a mixture of at least one rare gas, the treated wood substrate will have less warpage and less degradation, which improves the quality of wood use, but the disadvantage of this method: still utilize the longitudinal channels of wood The effect is to infiltrate the fluid, preservative and gas into the wood. In addition, during the treatment process, the preservative contains a variety of metal particles and metal oxide components, and does not take into account the chemical combination of metal particles and wood, and the problem of loss. and heavy metal pollution

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