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Wood preservative modification treatment method and application thereof

A treatment method and wood preservative technology, applied in the direction of wood treatment, wood treatment details, impregnated wood, etc., can solve problems such as threatening the environment and pollution, and achieve the effects of improving the resistance to loss, durability, and resistance to loss.

Active Publication Date: 2020-11-24
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, chemical antisepsis is a relatively common antiseptic method, but most traditional wood preservatives contain heavy metal salts and oxides such as copper, chromium, and arsenic, which threaten people's health and pollute the environment from their use. a concern

Method used

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  • Wood preservative modification treatment method and application thereof
  • Wood preservative modification treatment method and application thereof
  • Wood preservative modification treatment method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 17g of quercetin and 7.1g of oxalic acid dihydrate and dissolve them in 188mL of absolute ethanol to prepare a solution with a molar ratio of quercetin and oxalic acid dihydrate of 1:1, add 1.54g of p-toluenesulfonic acid to the solution, After stirring evenly, put in Populus tomentosa wood blocks.

[0029] The above system was impregnated under the vacuum condition of 525-600mmHg (0.07-0.08Mpa) for 15 minutes, then pressurized to 0.8Mpa and maintained for 24 hours. After impregnation, the wood blocks were put into an oven at 120°C for 8 hours after the ethanol solvent evaporated completely, and the modified wood grafted with quercetin was obtained.

Embodiment 2

[0031] Weigh 12g of quercetin and 10g of oxalic acid dihydrate and dissolve them in 188mL of absolute ethanol to prepare a solution with a molar ratio of quercetin and oxalic acid dihydrate of 1:2, add 1.54g of p-toluenesulfonic acid to the solution, and stir Evenly put into poplar wood block.

[0032] The above system was impregnated under the vacuum condition of 525-600mmHg (0.07-0.08Mpa) for 15 minutes, then pressurized to 0.8Mpa and maintained for 24 hours. After impregnation, the wood blocks were put into an oven at 120°C for 6 hours after the ethanol solvent evaporated completely, and the modified wood grafted with quercetin was obtained.

Embodiment 3

[0034] Weigh 15g of quercetin and 18.8g of oxalic acid dihydrate and dissolve them in 188mL of absolute ethanol to prepare a solution with a molar ratio of 1:3 between quercetin and oxalic acid dihydrate, add 1.54g of p-toluenesulfonic acid to the solution, Stir well and put in poplar wood pieces. The system was impregnated for 48 hours under vacuum conditions of 525-600mmHg (0.07-0.08Mpa). After impregnation, the wood blocks were put into an oven at 120°C for 4 hours after the ethanol solvent evaporated completely, and the modified wood grafted with quercetin was obtained.

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Abstract

The invention discloses a wood preservative modification treatment method. The wood preservative modification treatment method is characterized in that wood is treated by using a chemical agent containing quercetin and oxalic acid, wherein the quercetin is grafted to the cell wall of the wood through the oxalic acid. The specific method comprises the steps that 5-20 parts of quercetin and 2-50 parts of oxalic acid are weighed and dissolved in 150-300 parts of absolute ethyl alcohol, 0.4-2 parts of p-toluenesulfonic acid is added, and the chemical agent for treating wood is formed; the wood tobe treated is soaked for 48-96 h at normal temperature and normal pressure; and the impregnated wood blocks are placed in the environment of 120 DEG C to be treated for 2-8 h. According to the method,effective chemical bond combination can be formed between quercetin and wood cell walls, the durability of wood is improved, the loss resistance of the wood is improved, the technical problem that quercetin serving as a botanical natural antibacterial component is difficult to fix and easy to lose in the wood is solved, and the application of quercetin in the technical field of wood preservationis expanded.

Description

technical field [0001] The invention belongs to the technical field of wood modification, and relates to a wood modification treatment method capable of improving the corrosion resistance of wood, and an application of the method for modification treatment of wood. Background technique [0002] As a traditional renewable biomass material, wood has the advantages of natural degradability, easy processing, high strength-to-weight ratio, familiar pattern and color, good electrical insulation and acoustic properties, and has always been closely related to human life. However, as a natural material, wood is susceptible to fungi such as decay fungi, soft rot fungi, and molds, shortening its service life and causing major economic losses. Wood preservation is a method of treating wood by physical or chemical means to protect it from decaying fungi, insects, marine borers, etc., and to enhance the durability of wood. Wood preservative technology is of great significance to prolong ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/02B27K3/08B27K3/50B27K5/04
CPCB27K3/02B27K3/08B27K3/50B27K5/04
Inventor 毕振举曾飞扬袁静怡闫泽耀雷亚芳闫丽
Owner NORTHWEST A & F UNIV
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