Method for increasing dyeing and fixation rate of reactive dye to wood

A technology of reactive dyes and color fixation rate, 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, increasing water consumption and environmental pollution, and being unfavorable for wastewater biological treatment. It achieves the effects of easy industrial implementation, improved dyeing fixation rate, and high color fastness to dry and wet rubbing

Inactive Publication Date: 2015-04-08
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wood reactive dyes are generally fixed with soda ash color fixing agent. The principle is that under alkaline conditions, fibers and reactive dyes react chemically to form ether bonds (Cell-O-D) to fix reactive dyes on wood, but the dye solution Oh - It can also undergo nucleophilic reaction with reactive dyes to generate hydrolyzed dyes, which not only reduces the color fixation rate of reactive dyes, but also easily produces floating colors
Moreover, hydrolyzed dyes can...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of alkaline silica sol color fixing agent, its preparation method comprises the following steps:

[0027] (1) Using ethyl orthosilicate as raw material, add ethyl orthosilicate into absolute ethanol, stir evenly, and make solution A; mix distilled water and 28% concentrated ammonia water evenly, make solution B, control positive The molar mass ratio of ethyl silicate, ethanol, water, and ammonia water is 1:20:40:0.5.

[0028] (2) Put the 30wt% A solution prepared in step (1) into the reactor, raise the temperature to 40°C, start the stirrer in the reactor, and add the step ( 1) The prepared B solution and the remaining 70wt% A solution were condensed and refluxed at 40°C. After reacting for 30 minutes, KH550 was added dropwise (the molar ratio of KH550 to tetraethyl orthosilicate was 0.005:1), and the reaction was continued for 0.5 h, standing and aging for 12 hours to complete the preparation of the alkaline silica sol color fixing agent.

[0029] In the above...

Embodiment 2

[0033] A kind of method of the alkaline silica sol color-fixing agent of embodiment 1 in improving wood reactive dyestuff fixation rate, specifically comprises the following steps:

[0034] S1. Pretreatment: leaching poplar veneer samples (specification 100×50×2mm) in a water bath environment with a water-to-bath ratio of 1:40 and a temperature of 80°C (water bath temperature is 70-90°C) for 8 hours, and then Transfer to a bath ratio of 1:40, leaching in 8g / L NaOH solution for 2h, and finally in a bath ratio of 1:40, 3wt%H 2 o 2 Leach in the solution for 2h.

[0035] S2. Dyeing: Weigh the poplar after S1 and put it into a stainless steel dyeing vat, and then adjust the concentration to 1.0% (o.w.f. ) M-3BE reactive red dyeing solution (M-3BE reactive red dyeing solution can be implemented with a mass percentage of 0.5% to 2%) and 40g / L Yuanming powder into the dyeing vat, and oscillate evenly in a constant temperature oscillating water bath Finally, the temperature of the w...

Embodiment 3

[0044] A kind of method of the alkaline silica sol color-fixing agent of embodiment 1 in improving wood reactive dye dyeing color-fixation rate, concrete application method specifically comprises the following steps:

[0045] S1. Pretreatment: Extract poplar veneer samples (specification 100×50×2mm) in a water bath environment with a water bath ratio of 1:40 and a temperature of 80°C for 8 hours, and then transfer to a bath ratio of 1:40, 8g / L NaOH solution for 2h, and finally in a bath ratio of 1:40, 3%H 2 o 2 Leach in the solution for 2h.

[0046] S2, dyeing: the poplar after S1 in Example 3 is weighed and put into a stainless steel dye vat, and then according to the bath ratio of 1:40, the concentration is 0.5% (o.w.f) X-BR reactive blue dye solution and Put 40g / L Yuan Mingfen into the dyeing vat, shake evenly in a constant temperature oscillating water bath, then raise the temperature of the water bath at a rate of 2°C / min, and raise it to 50°C to keep dyeing at a const...

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PUM

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Abstract

The invention discloses a method for increasing dyeing and fixation rate of a reactive dye to wood. The method for increasing the dyeing and fixation rate of the reactive dye to the wood comprises the following steps: respectively extracting to-be-dyed wood in hot water, NaOH solution and H2O2; after reactive dye liquor and anhydrous sodium sulphate are mixed, dyeing the extracted wood to obtain dyed wood; then carrying out fixation to the dyed wood by adopting an alkali silica sol fixing agent, wherein the alkali silica sol fixing agent is prepared by carrying out sol-gel reaction on ethyl orthosilicate, a silane coupling agent, ethanol, water and ammonia which are taken as raw materials; soaping with the fixed wood by adopting soap lotion, then washing with cold water, and drying, thus the dyed and fixed wood is obtained. The method for increasing the dyeing and fixation rate of the reactive dye to the wood has the advantages that a technology is simple, the dyeing and fixation rate of the reactive dye to the wood is high, and an alcohol organic solvent can be recycled, so that increase of difficulty for treating printing and dyeing wastewater caused by using a large number of salts is avoided, and the method for increasing the dyeing and fixation rate of the reactive dye to the wood is safe, energy-saving, economical and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of dyeing methods of wood reactive dyes, in particular to a method for improving the color fixation rate of wood reactive dyes with an alkaline silica sol color fixing agent. Background technique [0002] Wood dyeing is an important method for dye molecules to absorb, infiltrate and fix in wood to make the wood have a certain firm color, realize the optimal use of inferior wood, and correct the visual characteristics of wood. Reactive dyes can covalently bond with cellulose, hemicellulose, and lignin in wood, endowing wood with excellent color fastness, coupled with its bright color and complete color spectrum, it is more and more widely used in wood dyeing. Wood reactive dyes are generally fixed with soda ash color fixing agent. The principle is that under alkaline conditions, fibers and reactive dyes react chemically to form ether bonds (Cell-O-D) to fix reactive dyes on wood, but the dye solution Oh - I...

Claims

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Application Information

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IPC IPC(8): B27K5/02
CPCB27K3/0207B27K3/52B27K5/02B27K2240/00
Inventor 喻胜飞刘元李贤军罗武生钟杨吴玉娟
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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