Waterglass-polymer homogeneous phase hybrid modified precursor liquid for lumber and preparation method thereof

Abstract

The invention discloses water glass-polymer homogeneous hybrid timber modification precursor solution and a preparation method thereof, which belongs to the technical field of timber modification in building materials. The prior silicate timber modification solution has poor leachability resistance, large brittleness of modified timber and so on. The modification solution comprises components with the following content: 23 to 50 weight percent of water glass, 0.2 to 4.2 weight percent of hydrophilic polymer, 0.3 to 2.6 weight percent of crosslinking agent, and 45 to 75 weight percent of water. Hydrophilic polymer solution is obtained by adding the hydrophilic polymer into water and stirring the hydrophilic polymer to be dissolved at a temperature of between 30 and 90 DEG C, then the hydrophilic polymer and the water glass are stirred and mixed at a temperature of between 30 and 80 DEG C, and the crosslinking agent is added to continuously stir for 1 to 3 hours to obtain the water glass-polymer homogeneous hybrid timber modification solution. The modification solution has the advantages of low cost, environmental protection, good leachability resistance and so on.

Description

technical field [0001] The invention belongs to the technical field of wood modification in building materials, and specifically relates to a homogeneous inorganic-organic hybrid wood modification precursor liquid composed of water glass and a hydrophilic polymer and a preparation method thereof. Background technique [0002] Wood is the only natural renewable resource and recycled green material and biological resource among the "four traditional" materials (steel, cement, plastic, wood). Faced with the contradiction between the increasing demand for wood and the serious shortage of wood resources, many countries in the world have planted large-scale plantations to ensure the supply of wood. However, compared with natural forest wood, artificial forest wood has low density, soft material, poor physical and mechanical properties, high moisture content and uneven distribution, monotonous wood color, and easy to shrink and deform. Generally, it is difficult to directly use it ...

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Problems solved by technology

Most of the reported organic precursors are urea-formaldehyde resins, phenolic resins, melamine-formaldehyde resins, etc. These organic precursors will release formaldehyde after treating wood, which is harmful to the environment and human body

[0004] Although the method of using inorganic silicate precursor solution can improve the hardness, strength, flame retardancy and wear resistance of wood, the brittleness of wood increases and the toughness decreases, which affects the feel of the material; simple water glass for wood modification Finally, the alkaline silica gel film formed with wood is more brittle. In the process of film formation, water is produced as a small molecule by-product, and many cracks will appear in the gel film; water glass and its insoluble salt precipitates are used to resist The loss is poor, and the performance of the modified wood cannot last

[0005] The existing inorganic-organic composite modification precursor solution is a mixture of multiple components, and there is microphase separation between the components, so the stability of the wood modification process is deteriorated due to repeated use

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