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A kind of dyeing method of modified wood

A dyeing method and modified technology, applied in wood treatment, wood processing equipment, wood treatment details, etc., can solve problems such as uneven structure, and achieve the effect of wide chromatographic range, bright colors and uniform colors

Inactive Publication Date: 2016-09-14
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, there are crystalline regions in the internal structure of the modified wood, which has structural inhomogeneity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 : Staining of acetylated pear wood boards

[0025] 558 Dehong soaked 10.15g of acetylated pear wood board in water for 30min (weight gain was about 7.5%), and hung it in supercritical CO 2Add 0.100g of Disperse Red 73 to the dyeing jar (1000mL) of the fluid dyeing equipment, and seal the dyeing jar. Inject CO at 130°C 2 , to a pressure of 35MPa, and keep it warm at 130°C for 240min. After the staining was completed, the CO was recovered under reduced pressure. 2 and dyes, and lower the temperature to below 40°C. Take out the dyeing vat, and take out the dyed acetylated pear wood board to obtain a evenly colored maroon acetylated pear wood board with grade 4 color fastness to washing.

Embodiment 2

[0029] Example 2 : Dyeing of acetylated cedar powder

[0030] After mixing 5.00g acetylated fir powder and 0.050g Disperse Red 152, add to supercritical CO 2 In the dyeing jar (1000mL) of the fluid dyeing equipment, then evenly drop 2.0mL of water onto the acetylated fir powder, and seal the dyeing jar. Inject CO at 130°C 2 Gas to a pressure of 30MPa, and maintain for 90min. After the staining was completed, the CO was recovered under reduced pressure. 2 and dyes, and lower the temperature to below 40°C. Take out the dyeing vat and pour out the dyed wood powder in the vat to obtain evenly colored red acetylated fir powder with a color fastness to washing of grade 4.

[0031] The above-mentioned red acetylated Chinese fir powder was hot-pressed at 120°C and 2.0 MPa for 10 minutes to obtain red acetylated wood boards.

Embodiment 3

[0035] Example 3 : Staining of benzylated fir powder

[0036] After mixing 20.00g benzylated fir powder and 0.400g disperse blue 148, add to supercritical CO 2 In the dyeing jar (1000mL) of the fluid dyeing equipment, 2.0mL of water was evenly added dropwise to the benzylated fir powder. Airtight dyeing tank, through 120 ℃ CO 2 Gas to a pressure of 25MPa, and keep for 45min. After the staining was completed, the CO was recovered under reduced pressure. 2 Gas and dye, and cool down to 40°C. Take out the dyeing vat, and pour out the dyed wood powder in the vat to obtain dark blue benzylated fir powder with uniform color, and its color fastness to washing is grade 4.

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Abstract

The invention provides a dyeing method for modified wood. It is to place modified wood boards or modified wood powder in the dyeing vat of supercritical CO2 fluid dyeing equipment, use CO2-H2O as the dyeing medium, and disperse dyes as the dyeing method. It is dyed at a temperature of 100-140°C, a pressure of 10-40 MPa, and a time of 10-600 minutes. After the dyeing is completed, CO2 and disperse dyes are recovered by lowering the pressure and temperature to obtain dyed modified wood boards or dyed modified wood powders. The dyed modified wood powders can be further hot-pressed to obtain dyed modified wood boards. The obtained dyed wood board has the effects of rich color, bright color, uniform color, etc., and the dyeing process has the advantages of cleanliness, environmental protection, and the like. This kind of colored plate can be used in indoor and outdoor decoration projects, especially as an aesthetic decorative material in a humid environment, and has a very broad application prospect.

Description

technical field [0001] The invention relates to the technical field of modified wood and its dyeing, in particular to a dyeing method of modified wood. Background technique [0002] Chemical modification of wood is one of the important means to realize the durability of wood. Certain characteristics of wood after chemical modification are often significantly improved or improved, such as corrosion resistance, insect resistance and service life. The dyeing of wood can improve the physical and chemical properties of the original surface of the wood, so that the wood can obtain a firmer color, improve the visual effect of the wood, and enhance the decorative effect of the appearance color of the wood products. [0003] Wood is mainly composed of cellulose, hemicellulose and lignin, which has a good affinity for water. Therefore, wood is often dyed with hydrophilic direct dyes, acid dyes, basic dyes and reactive reactive dyes, but the dyed wood often has disadvantages such as p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K5/02
Inventor 赵莹汤静芳杨瑶曹福祥王贵武谭晓燕
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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