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In-situ compaction and antibacteria preservative treatment technology of low mass-speed green wood

A fast-growing and dense technology, applied in the field of wood science, can solve the problems of mildew, harm to human health, and easy discoloration of wood.

Inactive Publication Date: 2010-09-15
WUYI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In a humid environment, wood is prone to discoloration, mildew, embrittlement and degradation, and it will also endanger human health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0014] Embodiment 1: Mix ethyl orthosilicate, ethanol and glacial acetic acid to prepare sol 1, uniformly disperse the prepared silver nanoparticles with a particle size of 10 nm into sol 1 to form a dispersion system, then add PVP and FWT successively, use Stir with an electric mixer for 30 minutes to form a nano-silver composite dispersion system. The molar ratio of tetraethyl orthosilicate, ethanol, glacial acetic acid, nano-silver, PVP and FWT is 1:1:0.01:0.01:0.01:0.001. Immerse the sample of low-quality fast-growing wood to be treated in sol 2, put it in a vacuum pressure impregnation dryer, vacuumize, take out the sample after 2 hours and dry it at 80°C until it is dried to obtain antibacterial and antiseptic Dense wood in situ.

Embodiment approach 2

[0015] Embodiment 2: Mix ethyl orthosilicate, ethanol and glacial acetic acid to prepare sol 1, uniformly disperse the prepared silver nanoparticles with a particle size of 20nm into sol 1 to form a dispersion system, then add PVP and FWT successively, use Stir with an electric mixer for 30 minutes to form a nano-silver composite dispersion system. The molar ratio of ethyl orthosilicate, ethanol, glacial acetic acid, nano-silver, PVP and FWT is 1:1:0.01:0.04:0.02:0.002. Immerse the sample of low-quality fast-growing wood to be treated in sol 2, put it in a vacuum pressure impregnation dryer, vacuumize, take out the sample after 2 hours and dry it at 80°C until it is dried to obtain antibacterial and antiseptic Dense wood in situ.

Embodiment approach 3

[0016] Embodiment 3: Mix ethyl orthosilicate, ethanol and glacial acetic acid to prepare sol 1, uniformly disperse the prepared silver nano-particles with a particle size of 40nm into sol 1 to form a dispersion system, then add PVP and FWT successively, use Stir with an electric mixer for 30 minutes to form a nano-silver composite dispersion system. The molar ratio of ethyl orthosilicate, ethanol, glacial acetic acid, nano-silver, PVP and FWT is 1:1:0.01:0.02:0.01:0.001. Immerse the sample of low-quality fast-growing wood to be treated in sol 2, put it in a vacuum pressure impregnation dryer, vacuumize, take out the sample after 2 hours and dry it at 80°C until it is dried to obtain antibacterial and antiseptic Dense wood in situ.

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Abstract

The invention relates to the in-situ compaction and antibacteria preservative treatment technology of a low mass-speed green wood, belonging to the field of wood sciences. The technology comprises the following steps of: preparing an SiO2 / wood composite material doped with nanometer Ag by using a sol-gel method; preparing nano-silver with the size of 10-100nm by using a liquid-phase chemical method; dispersing and dissolving the nano-silver into the sol prepared by mixing tetraethoxysilane, ethanol and glacial acetic acid; adding PVP and a binding agent FWT to obtain the sol with different particle diameters and concentrations of the nano-silver subjected to in-situ compaction treatment; soaking the gel for 2h through a finishing process and drying the gel to form an antibacteria preservative in-situ compact material. The wood prepared by the treatment maintains better size temperature property, greatly improves the mechanical property, and has favorable antibacteria preservative property at the same time.

Description

1. Technical field [0001] The invention relates to the impregnating and compacting technology and formula of low-quality fast-growing wood with inorganic solution, and realizes antibacterial and antiseptic functionality by doping nano-silver, and belongs to the field of wood science. 2. Background technology [0002] Densification technology can greatly improve the mechanical properties of wood. At present, the densification technologies of low-quality fast-growing wood at home and abroad mainly include: [0003] 1) Compressed and dense. Mainly radial or chordwise compression along the grain direction of the wood. One of the most prominent problems after the wood is compressed and compacted is the instability of the compression deformation. When the wood undergoes a large deformation under the action of an external force, a certain amount of stress will be generated inside it. As time goes on, especially when the wood When in a hot and humid environment, the internal resid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/16B27K5/06B27K3/16B27K5/04
Inventor 尹荔松王向军胡社军范海陆刘志平赵燕阳素玉龚青
Owner WUYI UNIV
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