Preparation method of complex wood material

A wood material and complexing technology, which is applied in the field of preparation of complex wood materials, can solve problems such as cracking and deformation, lack of forest resources, decay and mildew

Pending Publication Date: 2019-12-20
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lack of forest resources in my country, coupled with the inherent properties of wood, make it difficult for wood materials to meet the growing market demand in the field of products and applications. Wood functional improvement technology aims to improve the quality of wood materials, endow them with new properties, and expand their use. It has become an important part of my country's social and economic sustainable development
[0003] Wood products and wooden materials have outstanding properties, such as environmental properties—visual, tactile, auditory, olfactory, and regulatory 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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  • Preparation method of complex wood material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of a complexed wood material, comprising:

[0036] Step 1: Prepare the right amount of logs

[0037] A fresh eucalyptus tree with a diameter of 25 cm and a mass ratio of 2.5% plant polyphenols is sawed and processed to grow into a 300 cm wood segment, and after removing the bark, a eucalyptus log is obtained, and the absolute moisture content of the wood is 68%;

[0038] Step 2: Introducing metal salts into the above-mentioned polyphenol logs

[0039] Dissolve ferrous sulfate in the aqueous solution, and after stirring evenly, obtain ferrous sulfate salt solution, the concentration is 3.0g / L;

[0040] The polyphenol log prepared in step 1 is soaked in the ferrous sulfate salt solution in step 2 by using the atmospheric pressure impregnation method, and the impregnation time is 60 days, and the temperature is room temperature to obtain the polyphenol metal salt log;

[0041] Step 3: Dry polyphenol metal salt logs

[0042] Place it in a drying kiln...

Embodiment 2

[0047] A method for preparing oak complex sawn timber, comprising:

[0048] Step 1: Oak sawn timber preparation

[0049] Cut the fresh oak wood with a diameter of 350mm and containing 1.2% plant polyphenols into a 1200mm section, remove the bark, and then saw and process it into a sawn timber with a width of 152mm, a thickness of 22mm, and a length of 1200mm , using the kiln drying method to dry it to an absolute moisture content of 30%;

[0050] Step 2: Introducing metal salts into the above-mentioned oak sawn timber

[0051] Dissolve aluminum sulfate in the aqueous solution and stir evenly to obtain aluminum sulfate solution with a concentration of 0.3g / L;

[0052] Soak the polyphenol oak sawn timber prepared in step 1 in the aluminum sulfate aqueous solution in step 2, adopt the hydraulic impregnation method, the impregnation pressure is 2.0MPa, the impregnation time is 48h, and the impregnation temperature is 25°C. When it is in the cell cavity, cell wall or intercellul...

Embodiment 3

[0058] A preparation method of red sandalwood (grass pear) complex sawn timber, comprising:

[0059] Step 1: Prepare an appropriate amount of bird's foot red sandalwood (grass pear) sawn timber

[0060] Cut fresh red sandalwood (grass pear) containing 2.4% of plant polyphenols into 300cm wood segments, sawing into sawn timber with an interface of 50mm×50mm, and controlling the absolute moisture content to 80%;

[0061] Step 2: Introduce zinc sulfate into the above-mentioned red sandalwood (grass pear) sawn timber

[0062] Dissolving zinc sulfate in the aqueous solution, after stirring evenly, obtains zinc sulfate solution with a concentration of 0.8g / L;

[0063] The sawn wood of red sandalwood (grass pear) prepared in step 1 is impregnated by hydraulic pressure, the impregnation time is 6h, the temperature is 25°C, the pressure is 1.2MPa, the impregnation amount of zinc sulfate aqueous solution is 110%, and the wood is taken out to form polyphenols zinc salt wood;

[0064] ...

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Abstract

The invention relates to a preparation method of a complex wood material, and belongs to the technical field of wood processing. The preparation method of the complex wood material comprises the following steps: step 1, preparing a wood material with a polyphenol content greater than or equal to 0.3% by mass; step 2, introducing a metal salt into the wood material to obtain a polyphenol metal saltwood material; and 3, drying the polyphenol metal salt wood material to obtain the complex wood material. According to the invention, polyphenol substances in a wood material are utilized to introduce metal ions into the wood material; a ''cellulose-plant polyphenol-metal salt'' dynamic multiple sacrificial bond network structure is formed through hydrogen bonds and coordination bonds; and metalions are fixed in cell cavities, cell walls and intercellular spaces of the wood cells in situ, so that the effects of eliminating or weakening internal stress of the wood material, reducing cracking,improving dimensional stability and permeability, preventing corrosion and mildew, changing colors and the like are achieved.

Description

technical field [0001] The invention relates to the technical field of wood processing, in particular to a preparation method of complexed wood materials. Background technique [0002] With the advancement of science and technology and social development, human beings have an increasing demand for wood materials, with a wider range of applications and higher quality requirements. However, the lack of forest resources in my country, coupled with the inherent properties of wood, make it difficult for wood materials to meet the growing market demand in the field of products and applications. Wood functional improvement technology aims to improve the quality of wood materials, endow them with new properties, and expand their use. It has become an important part of my country's social and economic sustainable development. [0003] Wood products and wooden materials have outstanding properties, such as environmental properties—visual, tactile, auditory, olfactory, and regulatory p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/02B27K3/08B27K3/18B27K3/20B27K3/22B27K3/26B27K3/16
CPCB27K3/02B27K3/08B27K3/16B27K3/18B27K3/20B27K3/22B27K3/26
Inventor 余养伦吕斌张耀明于文吉
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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