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A kind of preparation method of complexed wood

A wood and complexing technology, applied in the direction of wood impregnation, wood treatment, impregnated wood, etc., can solve the problems of cracking, deformation, decay and mildew.

Active Publication Date: 2021-04-23
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Wood materials and wood products have outstanding properties, such as environmental properties - visual properties, tactile properties, auditory properties, olfactory properties and adjustment properties of wood, material properties - easy processing, high strength-to-weight ratio, thermal insulation and electrical insulation , biological function—renewability and degradability, these excellent qualities have been widely recognized by human beings, but the swelling and shrinkage of wood materials, cracking deformation, decay, mildew, discoloration, etc. also limit its application

Method used

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  • A kind of preparation method of complexed wood
  • A kind of preparation method of complexed wood
  • A kind of preparation method of complexed wood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A preparation method of complexed wood, comprising:

[0041] Step 1: Prepare the right amount of wood

[0042] Cut the pine wood into 200cm wood sections, process it into sawn timber of certain specifications after sawing, and control the absolute moisture content at 6% after drying;

[0043] Step 2: Introduce black wattle bark tannins into the wood

[0044] Dissolving black wattle bark tannin in water and stirring evenly forms a semi-colloidal aqueous solution in which molecular dispersion and molecular aggregation coexist, with a concentration of 20 g / L;

[0045] Then soak the wood prepared in step 1 in the above black wattle bark tannin solution; adopt hydraulic pressure impregnation, the impregnation time is 12h, the impregnation temperature is 25°C, and the pressure is 1.2MPa, and the plant polyphenols are introduced into the cell cavity , cell wall or intercellular space, through hydraulic flow control, the impregnation amount of tannin is 3% of the wood mass, t...

Embodiment 2

[0058] A preparation method of complexed wood, comprising:

[0059] Step 1: Prepare the right amount of logs

[0060] Cut the fresh oak wood into 300cm wood section, after removing the bark, obtain the oak log;

[0061] Step 2: Introducing polyphenols into oak wood

[0062] Dissolving the rubber extract in the aqueous solution, stirring evenly, forms a semi-colloidal aqueous solution in which the molecular dispersion state and the molecular aggregation state coexist, the concentration is 2.0g / L;

[0063] Then soak the oak oak log prepared in step 1 in the above-mentioned rubber extract solution; adopt pressure impregnation, the soaking time is 24h, the temperature is 25°C, and the pressure is 1.8MPa, and the rubber extract solution is introduced into the cells In the cavity, cell wall or intercellular space, take out the oak wood, place it in a drying kiln or in the air, make the water in the oak wood evaporate gradually, when the absolute moisture content of the oak wood is...

Embodiment 3

[0074] A preparation method of complexed wood, comprising:

[0075] Step 1: Prepare appropriate amount of catalpa wood

[0076] Cut catalpa wood into 200cm wood sections, process it into sawn timber of certain specifications after sawing, and control the absolute moisture content at 6% after drying;

[0077] Step 2: Introducing Polyphenols into Catalpa

[0078] Dissolve Mazhansi extract in the aqueous solution, and stir evenly to form a semi-colloidal aqueous solution with a molecular dispersion state and a molecular aggregation state coexisting, with a concentration of 0.3g / L;

[0079] Then the catalpa sawn timber prepared in step 1 is soaked in the above-mentioned Mazhansi extract solution; the immersion time is 4h, the temperature is 25°C, and pressure soaking is adopted, and the pressure is 12MPa, so that the impregnation amount of the Mazhansi extract solution is 0.3% of the wood mass. %, the catalpa sawn timber is taken out, placed in a drying kiln or in the air, so th...

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Abstract

The invention relates to a preparation method of complexed wood, which belongs to the technical field of wood processing. The preparation method of the complexed wood includes: step 1: preparing an appropriate amount of wood; step 2: introducing plant polyphenols into wood to obtain polyphenol wood; step 3: introducing metal salts into polyphenol wood to obtain polyphenol metal salt wood; Step 4: drying polyphenol metal salt wood to obtain complexed wood. The present invention supports the cellulose and / or hemicellulose by introducing a "cellulose-plant polyphenol-metal salt" dynamic multiple sacrificial bond network structure into the wood, so that it reduces or even does not generate swelling or swelling during moisture absorption or desorption. Shrinkage, at the same time, under the dynamic action of the continuous breaking and reconstruction of sacrificial bonds, dissipates a large amount of energy in the wood material system, eliminates or weakens the internal stress, and protects the integrity of the covalent bond network of the cellulose skeleton. The cracking problem provides a new method.

Description

technical field [0001] The invention relates to the technical field of wood processing, in particular to a preparation method of complexed wood. Background technique [0002] With the progress of science and technology and the development of society, the demand for wood is increasing, the application range is wider and wider, and the quality required is getting higher and higher. However, the lack of forest resources in my country and the inherent properties of wood make it difficult for wood materials to meet the growing market demand in the product and application fields. The purpose of wood functional improvement technology is to improve the quality of wood materials, endow them with new properties, and expand their scope of use. It has become an important part of the sustainable development of my country's social economy. [0003] Wood materials and wood products have outstanding properties, such as environmental properties - visual properties, tactile properties, audit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K3/02B27K3/16B27K3/22B27K3/26B27K3/32B27K3/34B27K3/50B27K3/52B27K5/04
CPCB27K3/0214B27K3/16B27K3/22B27K3/26B27K3/32B27K3/34B27K3/50B27K3/52B27K5/04
Inventor 余养伦于文吉张耀明闫昊鹏
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY