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Method for dyeing pure cotton fiber

A dyeing method and fiber technology, applied in the field of textile printing and dyeing, can solve problems such as poor solubility and troublesome separation process, and achieve the effects of low raw material cost, simple preparation method and high yield

Active Publication Date: 2013-04-10
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the reactive disperse dyes containing the same s-triazine reactive group of the same disperse dye parent have higher dye uptake, their solubility in supercritical carbon dioxide is poor; and the reactive disperse dyes containing vinylsulfone reactive groups, It is commonly used to convert β-hydroxyethylsulfone sulfate into vinylsulfone groups, but it will be hydrolyzed into two dyes containing hydroxyethyl groups and eliminated into vinylsulfone groups under the influence of temperature and pH during the conversion process , so the subsequent separation process is more troublesome

Method used

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  • Method for dyeing pure cotton fiber
  • Method for dyeing pure cotton fiber
  • Method for dyeing pure cotton fiber

Examples

Experimental program
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preparation example Construction

[0022] Dye preparation process:

[0023] Dissolve disperse dyes and triethylamine in an appropriate amount of dry N,N-dimethylformamide (DMF), and then dissolve haloacetyl chloride in an appropriate amount of dry DMF, and slowly drop them in an ice-water bath Put it into the above solution, react in an ice-water bath for 0.5-1h, then return to room temperature and react for 3-5h. Pour the reacted solution into 0.5mol / L NaHCO 3 Stir in the aqueous solution, a large amount of precipitates are formed, after standing still for several hours, filter, and drain at room temperature to obtain the product with a yield greater than 95%.

Embodiment 1

[0025] Dry the dye Ⅰ-1 well, weigh 1g and pulverize it, put it into the dissolving tank, then wrap 300g of cotton fabric on a hollow stainless steel shaft with small holes on the cylinder wall, and fix them together in a high-pressure dyeing tank with supercritical carbon dioxide middle. Turn on the refrigeration system and the heating system, and when the temperature reaches 40-50°C, turn on the high-pressure system and the circulation system, and carry out dyeing under the condition that the pressure reaches 15-20Mpa and the temperature reaches 75-80°C. The dyeing time is 40-60min, and then Stop the equipment, stand still for 0.5-1h, and recover carbon dioxide after the temperature and pressure drop. The dyed fabric was obtained under normal temperature and pressure. After dyeing, the cotton fabric is yellow, the color fastness to rubbing is 3-3.5, and the color fastness to washing is 3.5-4.

Embodiment 2

[0027] Dry the dye Ⅰ-2 well, weigh 1g and pulverize it, put it into the dissolving tank, then wrap 300g of cotton fabric on a hollow stainless steel shaft with small holes on the cylinder wall, and fix them together in a high-pressure dyeing tank with supercritical carbon dioxide middle. Turn on the refrigeration system and the heating system. When the temperature reaches 40-50°C, turn on the high-pressure system and the circulation system. Dyeing is carried out under the conditions that the pressure reaches 15-20Mpa and the temperature reaches 70-75°C. The dyeing time is 40-60min, and then Stop the equipment, stand still for 0.5-1h, and recover carbon dioxide after the temperature and pressure drop. The dyed fabric was obtained under normal temperature and pressure. After dyeing, the cotton fabric is yellow, the color fastness to rubbing is 3.5-4, and the color fastness to washing is 3.5-4.

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Abstract

The invention relates to a method for dyeing a pure cotton fiber. An active disperse dye is adopted to dye the pure cotton fiber in supercritical carbon dioxide, and contains chloroacetamide active groups. The preparation method of the dye is simple, the cost of the required raw material is low, the yield is high, and the dissolvability in supercritical carbon dioxide is good. According to the invention, pretreatment is not required to be carried out on cotton in the dyeing process, any additives are not required, and the dyeing can be finished in one step.

Description

technical field [0001] The invention belongs to the field of textile printing and dyeing. It specifically relates to the technology of dyeing pure cotton fibers with active disperse dyes containing halogenated acetamide active groups in supercritical carbon dioxide. Background technique [0002] The traditional dyeing process of textiles will discharge a large amount of sewage and cause environmental pollution problems. Using supercritical carbon dioxide fluid to replace water for dyeing can avoid the problem of sewage discharge, and carbon dioxide is cheap, non-toxic, and non-toxic. Inflammable and other advantages, so this is a safe and environmentally friendly dyeing process that meets the environmental requirements of today's world. In general, when dyeing fibers in supercritical carbon dioxide, it can be dyed in 10 minutes at 130 ℃ and 24 Mpa. The dyeing speed is 5-10 times that of the traditional process, and the dyeing rate of more than 98% can be achieved. The dye a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P3/66D06P1/94D06P1/16D06P1/38
Inventor 高丹林锦新黄婷婷崔红生
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI