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Method for raising dyeing performance of linen through modification by use of 1-butyl-3-methylimidazolium chloride ionic liquid

A technology of methylimidazolium chloride salt and ionic liquid, which is applied in textiles and papermaking, fiber treatment, plant fiber, etc., and can solve the problems of high temperature required for dissolution and the lack of real attention to the role of ionic liquids, etc.

Inactive Publication Date: 2012-10-17
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ionic liquids used by both are not ionic liquids with good solubility for cellulose. Among them, what Hu Renzhi used is an aqueous solution of ionic liquids, which is essentially different from pure ionic liquids. According to some previous research results, here In this case, the ionic liquid aqueous solution is similar to a surfactant, which is completely different from the modification mechanism of pure ionic liquid on ramie
[Bmim]BF adopted by Chen Pu 4 It has been proved that there is no dissolution effect on ramie whose main chemical composition is cellulose, and [Bmim]Br ionic liquid is a solid at normal temperature, and the temperature required for dissolution is relatively high. Therefore, in the modification of hemp, ion The role of liquids has not really been appreciated

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Sample: Ramie Fiber

[0019] a. Pretreatment: Wash and dry the degummed ramie fiber, and the moisture regain of the sample after drying is 5%.

[0020] b. Ionic liquid treatment: put the washed and dried ramie fiber into 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) ionic liquid for constant temperature treatment, the treatment temperature is 80°C, and the treatment time is Stir at a constant speed during the treatment process to ensure uniform treatment effect.

[0021] c. Washing method of the sample after treatment: After the treatment, the ionic liquid attached to the fiber is first rolled off, and then washed with water and dried.

[0022] d. Dyeing method: adopt the conventional reactive dyeing process, and the amount of salt is 50% of the amount used in the conventional dyeing process. After the above process treatment, the dye uptake rate of the fiber modified by 1-butyl-3-methylimidazolium chloride salt ([Bmim]Cl) ionic liquid is 75%, which is 14% higher th...

Embodiment 2

[0024] Sample: Ramie Fabric

[0025] a. Pretreatment: Wash and dry the degummed ramie fabric, and the moisture regain of the sample after drying is 5%.

[0026] b. Ionic liquid treatment: put the washed and dried ramie fabric into 1-butyl-3-methylimidazolium chloride salt ([Bmim]Cl) ionic liquid for constant temperature treatment, the treatment temperature is 80°C, and the treatment time is Stir at a constant speed during the treatment process to ensure uniform treatment effect.

[0027] c. Washing method of the sample after treatment: After the treatment, the ionic liquid attached to the fabric is first rolled off, and then washed and dried.

[0028] d. Dyeing method: adopt the conventional direct dyeing process, and the amount of salt is 50% of the amount used in the conventional dyeing process.

[0029] After the above process, the dye uptake rate of the fabric modified by the 1-butyl-3-methylimidazolium chloride salt ([Bmim]Cl) ionic liquid was 83%, which was 8% higher t...

Embodiment 3

[0031] Sample: Flax Fiber

[0032] a. Pretreatment: Wash and dry the degummed flax fiber, and the moisture regain of the sample after drying is 4%.

[0033] b. Ionic liquid treatment: put the washed and dried flax fiber into 1-butyl-3-methylimidazolium chloride salt ([Bmim]Cl) ionic liquid for constant temperature treatment, the treatment temperature is 120°C, and the treatment time is During the treatment process, stir at a constant speed to ensure a uniform treatment effect.

[0034] c. Washing method of the sample after treatment: After the treatment, the ionic liquid attached to the fiber is first rolled off, and then washed with water and dried.

[0035] d. Dyeing method: adopt the conventional direct dyeing process, and the amount of salt is 30% of the amount of salt in the conventional dyeing process.

[0036] After the above process, the dye uptake rate of the fiber modified by 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) ionic liquid was 78%, which was 15% higher...

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Abstract

According to the invention, bast-fibre or fabric is used as a raw material and can be modified by the use of a 1-butyl-3-methylimidazolium chloride ionic liquid ([Bmim]Cl) to substantially raise the dyeing performance of direct dyestuff or reactive dye on linen. The advantage of the invention lies in that 1-butyl-3-methylimidazolium chloride ionic liquid ([Bmim]Cl) is a high-efficiency cellulose swelling agent and has a simple treatment process. In addition, it is safe and nontoxic when processing by the use of the ionic liquid, and the ionic liquid can be recovered and utilized after the treatment, so as to reduce discharge of a large amount of high-density alkali waste liquid after traditional treatment. The dyeing performance of the modified bast-fibre or fabric, such as ramie, flax and hemp can be raised. High dye uptake can be also reached even without the addition of salt, which helps minimize the amount of salt during the dyeing process and reduce the dyeing cost.

Description

technical field [0001] The invention relates to a method for modifying hemp fiber or fabric with 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) ionic liquid to improve its dyeing performance, which belongs to the field of dyeing and finishing in the textile industry. Field of application technology. By adopting the invention, while improving the hemp dyeing performance, the pollution to the environment can be reduced, which contributes to the clean production of the printing and dyeing industry. Background technique [0002] Because hemp fiber has properties such as high strength, fast heat transfer, good air permeability, moth resistance and wear resistance, textiles made of hemp have always been favored by consumers. However, the crystallinity and orientation index of hemp are very high, which makes the hemp fiber rough and hard, and it is difficult for dye molecules and other chemical reagents to diffuse inside the fiber, which brings a lot of difficulties to its dyeing...

Claims

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Application Information

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IPC IPC(8): D06M13/473D06P3/62D06P3/66D06M101/06
Inventor 袁久刚王强范雪荣王平陈少瑜
Owner JIANGNAN UNIV
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