Method for fixing reactive disperse dyes in low-pressure carbon dioxide medium

A technology of reactive disperse dyes and carbon dioxide, which is applied in the catalytic color fixation of reactive disperse dyes and the fixation of reactive disperse dyes on natural fibers, can solve the problems of decreased utilization rate of disperse reactive dyes, high pressure, prolonging the process flow, etc., and achieve improvement Color fixing efficiency and utilization rate of dyes, reduction of requirements and investment, and broad application prospects

Active Publication Date: 2012-03-28
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the use of a large amount of solvent or organic wetting and bulking agent to pretreat the fiber takes a long time, and the residue on the fiber needs to be further processed, and the remaining solvent or auxiliary agent needs to be separated and recovered, which increases the complexity of the process. It also prolongs the process flow, and puts forward higher requirements for the explosion-proof safety of processing equipment
Adding acid to the supercritical carbon dioxide fluid can make the color fixing reaction between the dye active group and the fiber easier, but it also reduces the solubility of the dye in the supercritical carbon dioxide fluid, thereby

Method used

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  • Method for fixing reactive disperse dyes in low-pressure carbon dioxide medium
  • Method for fixing reactive disperse dyes in low-pressure carbon dioxide medium
  • Method for fixing reactive disperse dyes in low-pressure carbon dioxide medium

Examples

Experimental program
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Effect test

Embodiment 1

[0015] The dyed fiber textiles used in this example are pure cotton woven fabrics (102.0g / m2), which are wetted before dyeing (moisture content is 100%); the dyes used are disperse reactive red dyes (containing a vinyl reactive Group, provided by Taiwan Yongguang Chemical Co., Ltd., o.m.f is 0.3%).

[0016] See attached figure 1 As shown, the fabric dyeing steps of the supercritical carbon dioxide fluid used in this embodiment are as follows: firstly, the fabric to be dyed is smooth and uniform, and is wound in a loose state on the dyeing warp beam, and then the outer layer of the wound fabric is covered in advance. Prepared seamless weave mesh wrapping. Open the dyeing kettle 10, place the above-mentioned warp beam with the fabric and a predetermined amount of dye powder in the dyeing kettle 10, and then close the dyeing kettle 10. After the system is well emptied, close the fine-tuning valve 16 and the shut-off valves 23, 9, 15, open the shut-off valves 2, 6, 13, 14 and 11...

Embodiment 2

[0029] This embodiment adopts disperse reactive red dye (containing a vinyl active group, provided by Taiwan Yongguang Chemical Co., Ltd., o.m.f is 0.3%) to dry pure cotton woven fabric (102.0g / m 2 ) for dyeing and color fixing processing. The dyeing process conditions are 23.0MPa supercritical carbon dioxide fluid, the fluid is statically dyed every 10min and then circulates for 1min, the dyeing temperature is 80°C, and the total dyeing time is 120min; the color fixing process conditions are 5.0MPa, 140°C, and three The dosage of ethylenediamine is 2.88g / L, and the color fixing treatment time is 60min.

[0030] By the method of embodiment 1, to pure cotton woven fabric (102.0g / m 2 ) under the above conditions to carry out dyeing and color fixing processing respectively, and the specific steps and other conditions are as described in Example 1.

[0031] Table 2 shows the experimental results of dyeing pure cotton woven fabrics with disperse reactive red dyes (o.m.f. 0.3%) us...

Embodiment 3

[0036] This embodiment adopts disperse reactive red dye (containing a vinyl active group, provided by Taiwan Yongguang Chemical Co., Ltd., o.m.f is 0.3%) to wet state (humidity rate is 100%) pure cotton woven fabric (102.0g / m 2 ) for dyeing and color fixing processing. Dye dyeing process conditions are 23MPa supercritical carbon dioxide fluid, fluid static dyeing cycle 1min after every 10min, dyeing temperature is 80°C, total dyeing time is 120min; color fixing process conditions are 2.0MPa, 140°C, color fixing catalyst triethylene The dosage of diamine is 2.88g / L, and the color fixing treatment is 60min.

[0037] By the method of embodiment 1, to wet state pure cotton woven fabric (102.0g / m 2 ) under the above conditions to carry out dye uptake and color fixing processing respectively, the specific steps and other conditions are as described in Example 1.

[0038] Table 3 shows the experimental results of dyeing pure cotton woven fabrics with disperse reactive red dye (o....

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Abstract

The invention discloses a method for fixing reactive disperse dyes in a low-pressure carbon dioxide medium. The method is characterized in that: natural fiber textiles subjected to reactive disperse dye absorption and dyeing in a supercritical carbon dioxide fluid dyeing unit are put in a fixing unit; and in the presence of the carbon dioxide gas medium with pressure being 1.0-6.0MPa and a catalyst for fixation, the reactivity of the reactive groups of the dyes and reactive functional groups on the fibers is improved through unstable onium ion intermediate products formed by the catalyst for fixation and reactive groups of the dyes on the fibers, thus realizing catalytic fixation of the dyes on the fibers. The method has the characteristics that: the processing method of catalytic fixation in the low-pressure carbon dioxide gas medium is adopted for the dyes subjected to dyeing in the supercritical carbon dioxide fluid, thus improving the fixation efficiency of the dyes on the fibers and reducing the requirements for equipment and the investment in the equipment. The method has the advantages of simple process, high fixation efficiency and dye utilization rate, environment friendliness, high efficiency and the like.

Description

technical field [0001] The invention relates to a catalytic fixation method of active disperse dyes in a low-pressure carbon dioxide medium, in particular to a method for using a catalyst to fix active disperse dyes on natural fibers in a low-pressure carbon dioxide gas, and belongs to the technical field of textile dyeing and finishing. Background technique [0002] Supercritical carbon dioxide fluid is a green and environment-friendly fluid medium. It replaces the traditional water bath for dyeing and processing fiber textiles. It has the characteristics of environmental protection and clean production, as well as outstanding energy-saving and consumption-reducing effects. The status quo of high resource consumption, large amount of sewage discharge, and serious environmental pollution is of great significance. [0003] However, the supercritical CO of hydrophilic natural fibers, such as cotton, silk, wool and other fiber textiles, which currently account for a large marke...

Claims

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Application Information

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IPC IPC(8): D06P1/94D06P1/38D06P1/645
CPCD06B19/0005
Inventor 龙家杰肖国栋
Owner SUZHOU UNIV
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