Wood salt-free dyeing method

A salt-free dyeing and wood technology, applied in wood treatment, wood impregnation, wood impregnation, etc., can solve the problems of increasing the difficulty and cost of printing and dyeing wastewater treatment, deterioration of water quality and soil quality, degradation and recycling, etc., easy to achieve industrial implementation , lower surface tension, lower adsorption rate

Active Publication Date: 2018-12-07
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional dyeing process of wood reactive dyes, in order to overcome the Coulomb repulsion between dyes and wood fibers, a large amount of inorganic salts such as dye accelerator sodium chloride or sodium sulfate and color fixing agent soda ash (20-100g / L respectively) are used. To a certain extent, the adsorption amount and dye uptake rate of dyes on fibers are improved, but the concentration of chloride ions in dyeing wastewater is as high as 1×10 5 mg / L or more, the chroma exceeds the standard by several thousand times, and the COD reaches 8000-30000mg / L
The direct discharge of high-salt printing and dyeing wastewater will seriously deteriorate the water quality and soil quality that human beings depend on for survival, and the large amount of inorganic salts in the wastewater also prevents the wastewater from being degraded and recycled through physical, chemical and biochemical methods, which intensifies the difficulty and cost of printing and dyeing wastewater treatment

Method used

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Effect test

Embodiment 1

[0037] A kind of salt-free staining method of wood of the present embodiment specifically comprises the following steps:

[0038] S1. Pretreatment: The poplar veneer sample (specification 100×50×2mm) is prepared at a bath ratio of 1:40, a concentration of NaOH of 0.2%, and a concentration of cetyltrimethylammonium bromide (CTAB) of 0.8 %, the extraction temperature is 8h in a water bath environment with an extraction temperature of 60°C, and then transferred to a bath ratio of 1:80, H 2 o 2 The concentration is 5%, and the leaching temperature is 60°C hydrogen peroxide solution for 4 hours, and the wood is dried at 40°C until the moisture content is 28%±1%.

[0039] S2, 20g reactive blue M-2GE is dissolved in 60% ethanol aqueous solution, mixes evenly, obtains 1% reactive blue M-2GE ethanol aqueous solution;

[0040] S3. Dyeing: Weigh the poplar after S1 and put it into a stainless steel dyeing vat with a cover, and then add reactive blue M-2GE ethanol aqueous solution and 0...

Embodiment 2

[0055] A kind of salt-free staining method of wood of the present embodiment specifically comprises the following steps:

[0056] S1. Pretreatment: The eucalyptus veneer sample (specification 100×50×2mm) is prepared at a liquor ratio of 1:30, a NaOH concentration of 0.2%, and a polyoxyethylene octylphenol ether-10 (OP-10) concentration of 1.0%, leached for 8 hours in a water bath environment with an leaching temperature of 80°C, and then transferred to a bath ratio of 1:60, H 2 o 2 The concentration is 6%, the leaching temperature is 80°C hydrogen peroxide solution for 4 hours, and the wood is dried at 40°C until the moisture content is 28%±1%.

[0057] S2, 20g active yellow M-3RS is dissolved in 80% ethanol aqueous solution, mixes evenly, obtains 1% active yellow M-3RS ethanol aqueous solution;

[0058] S3. Dyeing: Weigh the eucalyptus after S1 and put it into a stainless steel dyeing vat with a cover, then add reactive yellow M-3RS ethanol aqueous solution and 1.2% dimethy...

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Abstract

The invention provides a wood salt-free dyeing method. The wood salt-free dyeing method comprises the following steps that pre-treated wood is placed into an ethanol aqueous solution containing reactive dyes and a cationic dimeric surfactant solution to be dyed, draining, soaping, washing and drying are carried out, and dyed wood is obtained. The wood salt-free dyeing method has the advantages that security and environmental protection are achieved, and the dye-uptake rate is high.

Description

technical field [0001] The invention relates to the technical field of dyeing methods for wood reactive dyes, in particular to a salt-free dyeing method for wood. Background technique [0002] Due to the hydrolysis and ionization of the hydroxyl group of the cellulose side chain, the wood has a certain amount of negative charge on the surface of the cellulose in the aqueous solution, which produces a certain charge repulsion to the anionic reactive dye. In the traditional dyeing process of wood reactive dyes, in order to overcome the Coulomb repulsion between dyes and wood fibers, a large amount of inorganic salts such as dye accelerator sodium chloride or sodium sulfate and color fixing agent soda ash (20-100g / L respectively) are used. To a certain extent, the adsorption amount and dye uptake rate of dyes on fibers are improved, but the concentration of chloride ions in dyeing wastewater is as high as 1×10 5 mg / L or more, the chroma exceeds the standard by several thousand...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K5/02B27K3/52
CPCB27K3/52B27K5/02
Inventor 喻胜飞刘元李贤军罗武生胡嘉裕唐玉莲于天会
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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