Flame-retardant reinforced wood and preparation method thereof

Abstract

The invention discloses flame-retardant reinforced wood and a preparation method thereof, and relates to the technical field of wood chemical modification. The invention discloses flame-retardant reinforced wood which is prepared by the following steps: soaking wood in a wood modifier, carrying out vacuum impregnation treatment under the condition of vacuum pressurization, controlling the vacuum degree to be -0.3 to 0.8 MPa, the pressure to be 0.5-1.5 MPa and the vacuum impregnation time to be 1.5-3 hours to obtain vacuum impregnated wood, and drying the vacuum impregnated wood. The wood modifier is prepared from the following raw materials: a triazole compound, hydroxyethyl methylacrylate, a catalyst n-butyllithium, ammonium dihydrogen phosphate, a nonionic surfactant, silicon dioxide powder, a silane coupling agent, a flame retardant, polyethylene glycol and water. The flame-retardant reinforced wood provided by the invention has excellent hardness, bending strength, impact toughness, dimensional stability and flame retardancy, and also has waterproofness and loss resistance, so that the service life of the modified wood is prolonged.

Description

technical field [0001] The invention belongs to the technical field of chemical modification of wood, and in particular relates to a flame-retardant reinforced wood and a preparation method thereof. Background technique [0002] With the rapid development of industry, the pollution has become more and more serious. Countries have successively introduced policies to limit deforestation, so that the cost of timber imports is increasing. For this reason, my country has begun to plant a large number of artificial fast-growing forests such as poplar, fir, and rubber trees. . Although the artificial fast-growing forest has a shorter growth period, compared with the natural forest, the density, physical and mechanical strength and dimensional stability of the fast-growing forest are relatively poor, which limits its application in the field of high value-added wood processing. How to expand the application range of artificial fast-growing trees and increase their hardness and stren...

AI Technical Summary

Problems solved by technology

In the prior art, there is also the use of nanoparticles (SiO 2 、TiO 2 、Al 2 o 3 , ZnO, etc.) directly or after surface modification, directly spray on the wood surface or prepare a coating with polymer modification, and then surface-coat or impregnate into the wood to endow the wood with super-hydrophobic self-cleaning properties, but the nanoparticles are in the polymerization Uneven dispersion in the material, resulting in poor superhydrophobic effect of the wood, and no bactericidal, anti-mildew and weather resistance properties

The surface modification of fluoropolymer or fluorosiloxane can effectively solve the above-mentioned remaining problems of weather resistance and superhydrophobic self-cleaning, but the solvent required for the coating is an oil-soluble chemical substance, which has the problem of large VOC release and environmental pollution.

[0005] In the prior art, flame-retardant reinforced wood is either highly toxic, has special odor, poor anti-loss ability, large VOC release pollutes the environment, complex operation process, high cost, or poor in-situ dispersion of nanoparticles, resulting in poor superhydrophobic effect. , or can improve the single waterproof performance of wood, but when multiple reagents are compounded, they often affect the interaction between each other, and increase the steps and costs of wood treatment. Multifunctional (high strength, waterproof, flame retardant, etc.) composite wood modification reagents have become an inevitable trend

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