A kind of high-strength wood composite material and preparation method thereof

Abstract

The invention discloses a high-strength wood composite material and a preparation method thereof, and relates to the technical field of wood composite materials. The preparation method of the high-strength wood composite material disclosed by the invention is as follows: uniformly mix water-soluble phenolic resin, polyethylene glycol solution, nano-calcium oxide and urea solution, then mix with silane coupling agent, adjust pH value with ammonia water, Prepare the wood modifier; put the wood into a pressure impregnation tank, and vacuum; add the wood modifier into the pressure impregnation tank, and vacuum impregnate; after removing the wood modifier, keep it under high temperature and high pressure for a period of time, and then After cooling to room temperature, washing and drying, a high-strength wood composite material is obtained. The high-strength wood composite material of the present invention increases the density of the wood, improves the mechanical strength of the wood, reduces the flammability of the wood, and prolongs the service life of the wood by modifying and impregnating the wood, thereby making the present invention Wood composite materials have a wider range of applications.

Description

technical field [0001] The invention belongs to the technical field of wood composite materials, in particular to a high-strength wood composite material and a preparation method thereof. Background technique [0002] In today's society, a series of severe objective problems such as global warming continue to sound the alarm for people. Environmental protection and sustainable development are themes that are respected worldwide. As a very important raw material, wood is the only renewable material among many materials, which meets the trend and requirements of sustainable development and environmental friendliness of materials that human society attaches importance to. With the country's emphasis on the ecological environment and the adjustment of forestry, countries have successively introduced policies to limit deforestation, so that the cost of timber imports is increasing, and the use of natural forest timber will be less and less. With the rapid development of industry...

AI Technical Summary

Problems solved by technology

Compared with natural forests, artificial fast-growing forests have shorter growth years, loose wood materials, low density, relatively poor physical and mechanical strength and dimensional stability, which severely restricts the application range of artificial fast-growing forests and affects the quality of artificial fast-growing forests. The application prospect greatly limits the sustainable development of the timber industry and the artificial fast-growing forest industry

[0003] The prior art methods for strengthening fast-growing forest trees mainly include: one is to fill the cell cavity with a modifier, and organic resin is used as a modifier. This treatment can improve the strength of the wood and reduce the water absorption of the wood, but it cannot be used for a long time. Hydrophobic, poor thermal stability; the second is to fill the cell wall and cell cavity with resinous substances to reduce the dry shrinkage and wet swelling of wood. This method can maintain the hydrophobicity of wood for a long time, but the reinforcement of wood The effect has little effect; the most effective way is that the components of wood cell walls (including lignin, cellulose and hemicellulose) chemically react with certain groups in high-strength wood composites to form new chemical bonds, The dimensional stability, strength, and durability of modified wood can be improved for a long time, but in the current research results, most of the modifiers are easy to precipitate from the wood with the extension of time, which affects the service life of the wood