Dyeing method of natural fibers in supercritical carbon dioxide fluid

A technology of carbon dioxide and natural fibers, which is applied to the dyeing of natural fibers by disperse reactive dyes and the dyeing and fixing reactions of natural fibers. It can improve the utilization rate, simplify the environmental protection and safety, and have a broad application prospect.

Active Publication Date: 2011-12-28
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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
Although the fiber modified by the modifier can improve the fixation rate of the dye, it may also change the original natural quality of the natural fiber and affect its wearability
Adding acid to the supercritical carbon dioxide fluid can make the color fixing re...

Method used

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  • Dyeing method of natural fibers in supercritical carbon dioxide fluid
  • Dyeing method of natural fibers in supercritical carbon dioxide fluid
  • Dyeing method of natural fibers in supercritical carbon dioxide fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The dyed fiber textiles used in this embodiment are pure cotton woven fabrics (102.0g / m 2 ), before dyeing by wet treatment (moisture content 100%); the dye used is disperse reactive red dye (containing a vinyl reactive group, provided by Taiwan Yongguang Chemical Co., Ltd., o.m.f is 0.3%).

[0019] See attached figure 1As 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 seal 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, 11, and ...

Embodiment 2

[0032] 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.

[0033] Dyeing and fixing of dry cotton woven fabrics with disperse reactive red dye was carried out in the same bath control test, the system pressure was 23.0MPa during color fixing, and other dyeing and color fixing conditions were the same as above.

[0034] By the method of embodiment 1, to pure cotton woven fabric (102.0g / m 2 ) under the above conditions to carry out d...

Embodiment 3

[0040] 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 ) respectively carry out 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 23.0MPa, 140°C, color fixing catalyst triethylene The dosage of diamine is 2.88g / L, and the color fixing treatment is 60min. In addition, under the above-mentioned dyeing and color-fixing conditions, a blank test without a color-fixing catalyst was carried out at the same time.

[0041] By the method of embodiment 1, to dry 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 ...

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Abstract

The invention discloses a natural fiber dyeing method in a supercritical carbon dioxide fluid. A natural fiber textile is placed in a supercritical carbon dioxide dyeing unit, which is dispersed with reactive dyes and in a dissolving state; the dyes are adsorbed uniformly on the fiber, and fully diffused in the fiber; and a catalytic fixation of the dyes on the fiber is realized in a 1.0-6.0 MPa carbon dioxide gas medium and with existence of a dye fixation catalyst. According to the invention, dye up-take and dye fixation reaction are conducted in different units and under different conditions, so a side reaction between a large amount of dyes, which are not absorbed, in a fluid and the dye fixation catalyst is avoided, when a dyeing and a dye fixation are carried out in a same bath. Therefore, utilization rate of the dyes and dye fixation catalysis efficiency of the catalyst to the dyes on the fiber during the dye fixation reaction are both increased. The technical method of the present invention has advantages of high dye fixation efficiency, high dye utilization rate, simple technology, green and environment friendliness.

Description

technical field [0001] The invention relates to a natural fiber dyeing method in supercritical carbon dioxide fluid, in particular to a dyeing method in which disperse reactive dyes are used in supercritical carbon dioxide fluid to carry out dyeing and color fixing reactions on natural fibers respectively, which belongs to the textile industry. Dyeing and finishing technology field. 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] At present, synthetic fiber textiles such as polyester, nylon, acetate, acrylic fiber, and polypropylene fib...

Claims

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Application Information

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IPC IPC(8): D06P1/94D06P1/16D06P1/38D06P3/00D06P5/02D06P5/06
CPCD06B19/00
Inventor 龙家杰肖国栋
Owner SUZHOU UNIV
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