Method for improving whole hydrophobicity of wood

A hydrophobic and wood-based technology, applied in wood treatment, impregnated wood, wood impregnation, etc., can solve the problems of strength reduction, deep color of wood, etc., and achieve the effect of improving dimensional stability

Inactive Publication Date: 2012-07-11
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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Problems solved by technology

And because the wood treated by this patent is heat-treated wood, there will be defects such as darker color and reduced strength of the wood.

Method used

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with typical embodiments.

[0015] A method for improving the overall hydrophobicity of wood of the present invention, its steps are as follows:

[0016] (1) Solvation of hydrophobic agent at room temperature: the hydrophobizing agent Alkyl Ketene Dimer (AKD) was mixed with n-hexane to form an AKD / n-hexane solution with a mass concentration of 2-10:100. The hydrophobizing agent AKD powder is solvated at room temperature by n-hexane organic solvent, and the water contact angle of the hydrophobized wood can be increased to more than 120°. And through vacuum-pressure impregnation, the hydrophobic agent is brought into the interior of the wood, which not only realizes the solvation of AKD at room temperature, but also avoids the disadvantage that AKD will fail due to the large amount of water in the traditional emulsion method, that is, AKD is in contact with water. Side effects occurred. The hydrophobiz...

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Abstract

The invention relates to a method for improving the whole hydrophobicity of wood. The method comprises the steps of dissolving a hydrophobic reagent (namely Alkyl Ketene Dimer (AKD)) by hexyl hydride, preparing solution with the mass concentration being 2-10:100; then in a vacuum-high pressure dipping process, keeping the wood in the environment with the vacuum degree being -0.09MPa for 15-60min, then sucking the AKD hexyl hydride solution with the mass concentration being 2-10:100 in a dipping tank, pressurizing to be 1.0MPa-3.0MPa, keeping for 0.5h-4h under a high pressure state; and finally, heating the processed wood for 1h-5h under the temperature being 100 DEG C-120 DEG C. Therefore, the AKD and the cellulose in the wood are subjected to chemical reaction, so as to produce functional wood with whole hydrophobicity. According to the new method, the process is simple, the hydrophobic effect is obvious, and the whole hydrophobicity of the wood can be improved.

Description

technical field [0001] The invention relates to a method for improving the overall hydrophobicity of wood, and is especially suitable for requiring more environmentally friendly reagents and techniques, and is suitable for the overall hydrophobic treatment of indoor wood. Background technique [0002] At present, improving the dimensional stability of wood is an urgent requirement to expand the use range of wood, prolong the service life of wood, and increase the added value of wood products. In recent decades, the dimensional stability of wood has been improved by means of heat treatment, hydrophobic polymer filling and chemical modification at home and abroad, and it has been proved that the use of alkyl compounds to modify the interior of wood is the key to improving the hydrophobicity and size of wood. effective means of stability. Such as acetylated wood, trade name (Gua wood). Acetylated wood uses acetic anhydride as the raw material, and after being fully mixed, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K5/04B27K3/08B27K3/50
Inventor 傅峰王思群史增谦林兰英何盛陈志林彭立民卢克阳梁善庆
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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