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A kind of wood preservative and its application

A wood preservative, wood technology, applied in the direction of wood impregnation, wood treatment, wood impregnation, etc., can solve the problems of poor solubility of salicylic acid, difficult to fix, poor resistance to loss, etc., and achieves simple preparation process, easy implementation, and easy operation. Effect

Inactive Publication Date: 2020-10-30
NORTHWEST A & F UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention will solve three levels of technical problems: one is that in outdoor or humid environments, wood will inevitably be attacked by decaying bacteria and its use value will be reduced. This patent application explores and provides a The wood preservative with effective antibacterial ingredients makes the wood more excellent in corrosion resistance; the second is that salicylic acid has poor solubility in water, and salicylic acid with a high concentration is corrosive due to its strong acidity. These physical and chemical characteristics limit salicylic acid. The direct application of acid, this patent application intends to expand the application of salicylic acid in the field of wood preservation technology; the third is that salicylic acid molecules can not form effective chemical bonds with wood components such as lignin, cellulose and hemicellulose inside the wood, Difficult to fix in wood, poor loss resistance

Method used

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  • A kind of wood preservative and its application
  • A kind of wood preservative and its application
  • A kind of wood preservative and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Prepare wood preservative 1#

[0028] Weigh 1.0g of salicylic acid and dissolve it in 17mL of ethanol, add 3g of composite surfactant (by mass ratio, the compounding ratio of Span80 and Tween80 is 2:3), slowly add about 80mL of water at 60°C, and then Add 2 mL of 2.5 mol / L sodium chloride solution, and stir for 10 min at a stirring speed of 500 r / min to obtain a milky white stable emulsion. After the emulsification is sufficient, slowly add a certain amount of ethyl orthosilicate (the mass ratio of salicylic acid to ethyl orthosilicate is 1:5), place it in a water bath at 60°C and stir for 3 hours to obtain a wood preservative 1#.

[0029] 2) Wood preservative treatment method

[0030] In this example, the soaking method is used to carry out anti-corrosion treatment on the test material. The test material used is Populus tomentosa (Populustomentosa). Under the condition of normal temperature and pressure, soak the Populus tomentosa specimen to be treated in wood ...

Embodiment 2

[0032] 1) Prepare wood preservative 2#

[0033] Weigh 1.0g of salicylic acid and dissolve it in 33mL of ethanol, add 3g of composite surfactant (by mass ratio, the compounding ratio of Span80 and Tween80 is 3:4), slowly add about 80mL of water at 50°C, and then Add 2mL of 2.5mol / L sodium chloride solution and stir for 10min at a stirring speed of 500r / min to obtain a milky white stable emulsion. After the emulsification is sufficient, slowly add a certain amount of ethyl orthosilicate (the mass ratio of salicylic acid to ethyl orthosilicate is 1:15), place it in a water bath at 50°C and stir for 3 hours to obtain a wood preservative 2#.

[0034] 2) Wood preservative treatment method

[0035] In this embodiment, the test material is subjected to anti-corrosion treatment by means of vacuum treatment. The test material used is Populus tomentosa. Populus tomentosa test piece is placed in the treatment tank, imports described wood preservative 2# in the treatment tank; The trea...

Embodiment 3

[0037] 1) Prepare wood preservative 3#

[0038] Weigh 1.0g of salicylic acid and dissolve it in 17mL of ethanol, add about 5g of composite surfactants (by mass ratio, the compounding ratio of Span80 and Tween80 is 4:5), slowly add about 80mL of water at 40°C, and then Then add 2 mL of 2.5 mol / L sodium chloride solution and stir for 10 min at a stirring speed of 500 r / min to obtain a milky white stable emulsion. After the emulsification is sufficient, slowly add a certain amount of ethyl orthosilicate (the mass ratio of salicylic acid to ethyl orthosilicate is 1:20), place it in a water bath at 40°C and stir for 3 hours to obtain a wood preservative 3#.

[0039] 2) Wood preservative treatment method

[0040] In this example, the full-cell method (vacuum pumping-pressurized impregnation treatment method) was used to carry out antiseptic treatment on the test material. The test material used is Populus tomentosa. Soak the Populus tomentosa test piece in wood preservative 3#, ...

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Abstract

The invention discloses a wood preservative. The effective bacteriostatic components of the wood preservative comprise salicylic acid, and the salicylic acid is present in the wood preservative at least in the form of microcapsules. Preparation of salicylic acid microcapsules comprises the following steps: weighing salicylic acid dissolved in 8-35 mL of ethanol, and adding 2-5 g of a composite surfactant into the salicylic acid ethanol solution, heating to 40-60 DEG C, adding water, adding sodium chloride solution, and stirring to obtain emulsion; when completely emulsified, adding 10-35 mL ofethyl orthosilicate, stirring in 40-60 DEG C water bath to obtain that salicylic acid microcapsule. The invention also provides the application of the wood preservative. The salicylic acid microcapsules are combined with wood components through strong chemical bonds to improve the anti-loss performance of the preservative and have obvious inhibitory effect on wood rot fungi.

Description

technical field [0001] The invention belongs to the technical field of wood modification, and relates to a wood preservative capable of improving wood corrosion resistance, in particular to a microcapsule wood preservative with salicylic acid as an effective antibacterial component and good loss resistance. Background technique [0002] Wood is a renewable and environment-friendly biomass material, which has the advantages of high strength-to-weight ratio, less energy consumption for processing, and relatively little environmental pollution. It plays a very important role in economic and social development and people's lives. However, because wood is composed of natural polymer compounds, there are deficiencies such as loose material, large variation in material properties, and vulnerable to damage by the environment and microorganisms. affect its value. These defects limit the utilization of wood to a large extent, and people have been actively studying methods to improve ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K3/08B27K3/02B27K3/52B27K3/00
CPCB27K3/005B27K3/02B27K3/08B27K3/52B27K2240/20
Inventor 闫丽陈爽雷亚芳曾飞扬方森苗毕振举
Owner NORTHWEST A & F UNIV
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