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Preparation method of sterilized high-strength crack prevention wood

A high-strength, anti-cracking technology, used in wood treatment, wood heating, humidity-conditioning wood, etc., can solve problems such as poor mechanical properties and dimensional stability, high resistance to swelling coefficient, easy to absorb water and cause swelling and deformation, and achieve excellent sterilization. Anti-mildew performance, good dimensional stability, no formaldehyde release effect

Inactive Publication Date: 2016-12-07
张静
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: because of its unique composition and honeycomb porous structure, wood is easy to absorb water and cause swelling and deformation, easy to crack and warp due to water decomposition, poor mechanical properties and dimensional stability, and is usually covered by amorphous substances. Deposition and formation of completely encrusted pit film and other reasons, the problem of poor permeability, the present invention is a preparation method of sterilized anti-cracking high-strength wood, the present invention selects wood and puts it into a pressure tank for blasting treatment after being boiled. After drying to control the moisture content, the wood is soaked in the wood modification solution, which is concentrated and allyl glycidyl ether, dimethylacetamide, diethylene glycol, Sodium hydroxide, diammonium hydrogen phosphate, cyproconazole and other substances are prepared. After soaking, the wood is taken out and dried, and the nano-silica sol modified by hexadecyltrimethoxysilane is evenly sprayed on the surface of the wood. It can be dried after spraying. The wood prepared by the invention has good mechanical properties and dimensional stability, has excellent sterilization and anti-mildew properties, and has a high anti-swelling coefficient. Long-term use will not cause cracking and warping. Moreover, the prepared wood The modified liquid is safe and environmentally friendly, without formaldehyde release

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] First take by weighing 50g lily leaf and 100g tea seed meal respectively, after drying, pulverize and sieve to obtain 50 mesh lily leaf powder and 50 mesh tea seed meal powder, mix the powder and stir evenly, and mix the powder according to the solid-to-liquid ratio of 1: 8 was mixed with 10% ammonia water by mass fraction, soaked for 8 hours, and suction filtered to obtain the filter residue; freeze-dried the above filter residue, mixed the dry matter with propane at a solid-to-liquid ratio of 1:5, and used supercritical carbon dioxide at a critical pressure of 4.2Mpa and a critical Extract at a temperature of 96°C for 30 minutes. After the extraction, centrifuge to obtain a supernatant. Rotate the supernatant to remove the propane solvent to obtain a concentrated solution for use. Add 3 g of nano-silica micro Balls, 120mL ethanol solution with a mass fraction of 95%, ultrasonically dispersed for 5min to obtain a dispersion, dropwise added 3mL hexadecyltrimethoxysilane ...

example 2

[0024] First take by weighing 60g lily leaf and 125g tea seed meal respectively, after drying, pulverize and sieve to obtain 55 order lily leaf powder and 55 order tea seed meal powder, mix the powder and stir evenly, and mix the powder according to the solid-to-liquid ratio of 1: 8 was mixed with 10% ammonia water by mass fraction, soaked for 9 hours, and suction filtered to obtain the filter residue; freeze-dried the above filter residue, mixed the dry matter with propane at a solid-to-liquid ratio of 1:5, and used supercritical carbon dioxide at a critical pressure of 4.3Mpa and critical Extract at a temperature of 97°C for 35 minutes. After the extraction, centrifuge to obtain a supernatant. Rotate the supernatant to remove the propane solvent to obtain a concentrated solution for later use; add 4 g of nano-silica micro spheres, 135mL ethanol solution with a mass fraction of 95%, ultrasonic dispersion for 10min to obtain a dispersion, drop 4mL hexadecyltrimethoxysilane into...

example 3

[0027] First take by weighing 70g lily leaf and 150g tea seed meal respectively, after drying, pulverize and sieve to obtain 60 order lily leaf powder and 60 order tea seed meal powder, mix the powder and stir evenly, and mix the powder according to the solid-to-liquid ratio of 1: 8 was mixed with 10% ammonia water by mass fraction, soaked for 10 hours, and suction filtered to obtain the filter residue; the above filter residue was freeze-dried, and the dry matter was mixed with propane at a solid-to-liquid ratio of 1:5, and the critical pressure was 4.5Mpa and critical Extract at a temperature of 98°C for 40 minutes. After the extraction, centrifuge to obtain a supernatant. Rotate the supernatant to remove the propane solvent to obtain a concentrated solution for use. Add 5 g of nano-silica micro spheres, 150mL ethanol solution with a mass fraction of 95%, ultrasonically disperse for 15min to obtain a dispersion, add 5mL hexadecyltrimethoxysilane dropwise to the flask, put the...

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Abstract

The invention discloses a method for preparing sterilized and anti-cracking high-strength wood, which belongs to the field of wood. In the present invention, the wood is boiled in water and placed in a pressure tank for blasting treatment. After the treatment, the water content is controlled by drying, and the wood is soaked in the wood modification liquid. The wood modification liquid is concentrated and extracted from lily leaves and tea seed dregs. Allyl glycidyl ether, dimethylacetamide, diethylene glycol, sodium hydroxide, diammonium hydrogen phosphate, cyproconazole and other substances. Take out the soaked wood and dry it, and spray ten times on the wood surface evenly The nano-silica sol modified by hexaalkyltrimethoxysilane can be dried after spraying. The wood prepared by the invention has good mechanical properties and dimensional stability, has excellent sterilization and anti-mold properties, and has a high anti-swelling coefficient. , long-term use will not cause cracking and warping, and the prepared wood modification solution is safe and environmentally friendly, and has no formaldehyde release.

Description

technical field [0001] The invention discloses a method for preparing sterilized and anti-cracking high-strength wood, which belongs to the field of wood. Background technique [0002] Wood has been widely used today because of its many advantages, such as high strength-to-weight ratio, good elasticity, impact resistance [0003] Strike, rich and beautiful texture and tone. But at the same time, there are many shortcomings in the process of using wood, such as anisotropy of shrinkage and swelling, easy to rot and insects, easy to burn, etc., which largely limits the use of wood . Wood modification is a physical or chemical processing method aimed at improving or changing the physical, chemical, mechanical properties and structural characteristics of wood. Its purpose is to improve the natural corrosion resistance, acid resistance, alkali resistance, flame retardancy, mechanical properties and dimensional stability of wood. The means and methods of wood modification are d...

Claims

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Application Information

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IPC IPC(8): B27K1/00B27K5/00B27K3/52B27K3/00B27K3/02B27K5/04B27K3/12
CPCB27K1/00B27K3/007B27K3/0207B27K3/12B27K3/52B27K5/001B27K5/007B27K5/04B27K2240/20
Inventor 张静王统军
Owner 张静
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