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A kind of modified wood and preparation method and application of modified wood

A wood modification technology, applied in wood treatment, wood impregnation, wood impregnation, etc., can solve the problems of volatile loss of organic components, adverse effects of wood durability, etc., and achieve high promotion and application value, dimensional stability, and cementing performance Good results

Active Publication Date: 2021-02-26
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned modifiers all contain organic components, which are easy to volatilize and lose during long-term service, which will adversely affect the durability of wood.

Method used

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  • A kind of modified wood and preparation method and application of modified wood
  • A kind of modified wood and preparation method and application of modified wood
  • A kind of modified wood and preparation method and application of modified wood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Wood pretreatment: Before impregnation, put the low-density poplar with a size of 20cm×10cm×3cm into an oven at 65° C. to dry until the moisture content is less than 10%.

[0046] (2) Take out the dried poplar wood in step (1), put it in the dipping tank, adjust the pressure inside the tank to a negative pressure of -0.09MPa, and keep it for 2 hours. Then inject silica sol with a solid content of 10% into the tank and fill the tank, then adjust the pressure inside the tank to 1.0 MPa, and keep it for 6 hours, so that the silica sol solution can fully enter the interior of the wood. Release the pressure and drain the excess silica sol solution in the tank.

[0047] (3) Take out the poplar wood impregnated with the silica sol solution in step (2), and put it into an oven with a temperature of 65° C. to dry until the moisture content is less than 10%.

[0048] (4) Take out the dried poplar wood in step (3), put it in the dipping tank, adjust the pressure in the tank to ...

Embodiment 2

[0051] (1) Wood pretreatment: Before impregnation, put the low-density poplar with a size of 20cm×10cm×3cm into an oven at 65° C. to dry until the moisture content is less than 10%.

[0052] (2) Take out the dried poplar wood in step (1), put it in the dipping tank, adjust the pressure inside the tank to a negative pressure of -0.09MPa, and keep it for 2 hours. Then inject silica sol with a solid content of 15% into the tank and fill the tank, then adjust the pressure inside the tank to 1.0 MPa, and keep it for 6 hours, so that the silica sol solution can fully enter the interior of the wood. Release the pressure and drain the excess silica sol solution in the tank.

[0053] (3) Take out the poplar wood impregnated with the silica sol solution in step (2), and put it into an oven with a temperature of 65° C. to dry until the moisture content is less than 10%.

[0054] (4) Take out the dried poplar wood in step (3), put it in the dipping tank, adjust the pressure in the tank t...

Embodiment 3

[0057] (1) Wood pretreatment: Before impregnation, put the low-density poplar with a size of 20cm×10cm×3cm into an oven at 65° C. to dry until the moisture content is less than 10%.

[0058] (2) Take out the dried poplar wood in step (1), put it in the dipping tank, adjust the pressure inside the tank to a negative pressure of -0.09MPa, and keep it for 2 hours. Then inject silica sol with a solid content of 25% into the tank and fill the tank, then adjust the pressure inside the tank to 1.0 MPa, and keep it for 6 hours, so that the silica sol solution can fully enter the interior of the wood. Release the pressure and drain the excess silica sol solution in the tank.

[0059] (3) Take out the poplar wood impregnated with the silica sol solution in step (2), and put it into an oven with a temperature of 65° C. to dry until the moisture content is less than 10%.

[0060] (4) Take out the dried poplar wood in step (3), put it in the dipping tank, adjust the pressure in the tank t...

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Abstract

The invention relates to a modified wood and a preparation method of the modified wood. The modified wood includes a wood body and a hydrated calcium silicate gel located in the voids of the wood body. The modified wood provided by the invention has high density, dimensional stability and excellent mechanical properties. The preparation method of the modified wood comprises the following steps: 1) introducing component A into the pores of the wood body to obtain the wood loaded with component A; 2) introducing component B into the wood loaded with component A In the pores, make it react with component A in the pores to form calcium silicate hydrate gel. The method for strengthening wood with inorganic components provided by the invention is energy-saving and environment-friendly. After the wood is strengthened, the resulting wood has excellent properties and has high promotion and application value.

Description

technical field [0001] The invention relates to a modified wood and a preparation method and application of the modified wood. Background technique [0002] With the continuous strengthening of natural forest protection, forest harvesting has rapidly changed from natural forests to artificial forests. However, some poor-quality tree species in plantations, such as larch, camphor tree, birch, masson pine, etc., have not been efficiently utilized. In order to realize the effective allocation of plantation wood resources, the modification of plantation wood is more and more important. Therefore, in the future, the focus of my country's wood modification is still to resist the high-grade wood, improve the utilization rate of wood from the aspects of increasing the density and strength of wood, improving the dimensional stability of wood, and prolonging the service life of wood. [0003] Traditional wood modification technologies mainly include wood plastic bonding, wood impreg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K3/08B27K3/32B27K3/16B27K5/04
CPCB27K3/08B27K3/16B27K3/32B27K5/04
Inventor 孔祥明林辉
Owner TSINGHUA UNIV
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