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A kind of preparation method of free radical grafting regenerated cellulose yarn

A technology of regenerated cellulose and free radicals, applied in plant fibers, fiber treatment, dyeing methods, etc., can solve the problems of unsalt-free and environmentally friendly dyeing of cellulose fibers, poor dye adsorption, and large amount of reagents, etc., to achieve strong reactivity , grafting rate increase, low production cost effect

Active Publication Date: 2021-07-30
SHAOXING MAIBAO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to enhance the affinity of cellulose fibers for dyes, amine or quaternary ammonium salt additives containing different reactive groups are mainly used to modify the surface of cotton fibers. However, these cationic additives have small molecular weight, low Poor dye adsorption, long processing cycle, large amount of reagents, low color fastness and other problems, it is difficult to meet the demand for salt-free and environmentally friendly dyeing of cellulose fibers[Chaiyapat P S, Namtaya Y M, Edgar A R. Surface modification to improve dyeing of cotton fabric with a cationic dye. Coloration Technology,2002, 118: 64-68; Sun Yan, Xie Kongliang. Salt-free dyeing of cotton modified with multi-active cationic crosslinking agent. Printing and Dyeing,2006, 4: 1-3]

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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  • A kind of preparation method of free radical grafting regenerated cellulose yarn
  • A kind of preparation method of free radical grafting regenerated cellulose yarn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Dissolve chitosan with a viscosity average molecular weight of 50,000 and a deacetylation degree of 93% in 1-ethyl-3-methylimidazolium chloride / 1-carboxymethyl-3-methyl In imidazole bisulfate (mass ratio is 9:1) binary ionic liquid, after cooling to room temperature, add acrylic acid monomer according to the mass ratio of acrylic acid and chitosan as 0.3:0.7, and then add initiator potassium persulfate to make Its mass concentration in the binary ionic liquid is 0.5%.

[0026] (2) Stir the above binary ionic liquid solution evenly for 10 minutes, then add viscose fiber yarn at a bath ratio of 1:30 under nitrogen protection (the mass ratio of acrylic acid and chitosan to viscose fiber yarn is 0.5:1), The reaction was stirred at 35 °C for 1 h. After the reaction, the viscose fiber yarn was taken out, washed with hot water for 5 times, and dried in a vacuum oven at 60°C for 2 hours to obtain acrylic acid and chitosan copolymerized modified viscose fiber yarn samples. ...

Embodiment 2

[0028] (1) Dissolve chitosan with a viscosity average molecular weight of 20,000 and a deacetylation degree of 95% in 1-ethyl-3-methylimidazolium chloride / 1-carboxymethyl-3-methyl Imidazolium bisulfate (mass ratio is 8:2) binary ionic liquid, after cooling to room temperature, add acrylic acid monomer according to the mass ratio of acrylic acid and chitosan as 0.5:0.5, and then add initiator potassium persulfate to make Its mass concentration in the binary ionic liquid is 1%.

[0029](2) Stir the above binary ionic liquid solution evenly for 10 minutes, then add viscose fiber yarn at a bath ratio of 1:30 under nitrogen protection (the mass ratio of acrylic acid and chitosan to viscose fiber yarn is 0.5:1), The reaction was stirred at 50 °C for 1 h. After the reaction, the viscose fiber yarn was taken out, washed with hot water for 5 times, and dried in a vacuum oven at 60°C for 3 hours to obtain acrylic acid and chitosan copolymerized modified viscose fiber yarn samples. Aft...

Embodiment 3

[0031] (1) Dissolve chitosan with a viscosity average molecular weight of 20,000 and a deacetylation degree of 95% in 1-ethyl-3-methylimidazolium chloride / 1-carboxymethyl-3-methyl Imidazolium bisulfate (mass ratio is 8:2) binary ionic liquid, after cooling to room temperature, add acrylic acid monomer according to the mass ratio of acrylic acid and chitosan as 0.5:0.5, and then add initiator potassium persulfate to make Its mass concentration in the binary ionic liquid is 1%.

[0032] (2) Stir the above binary ionic liquid solution evenly for 10 minutes, then add bamboo pulp fiber yarn at a bath ratio of 1:30 under nitrogen protection (the mass ratio of acrylic acid and chitosan to bamboo pulp fiber yarn is 0.5:1), The reaction was stirred at 50 °C for 1 h. After the reaction, the bamboo pulp fiber yarn was taken out, washed four times with hot water, and dried in a vacuum oven at 60°C for 3 hours to obtain acrylic acid and chitosan copolymerized modified bamboo pulp fiber ya...

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Abstract

The invention discloses a preparation method of free radical grafting regenerated cellulose yarn, which is obtained by carrying out graft copolymerization reaction of regenerated cellulose yarn and acrylic acid / chitosan ionic liquid solution through a chemical initiator. The method of the present invention is simple and easy to use, less reagent consumption, green and environmentally friendly, and human-friendly; the prepared modified regenerated cellulose yarn has a high grafting rate of the binary polymer on the surface, good washing resistance, high efficiency and long-lasting antibacterial effect, Moreover, the acrylic acid copolymer has strong hydrophilicity and is easy to swell in aqueous solution to form a network structure and carboxylate anions. It can actively adsorb cationic dyes without using inorganic salts and dyeing accelerators. It has high dyeing rate and color fastness. It is widely used in the field of environmental protection dyeing.

Description

technical field [0001] The invention relates to a preparation method of free radical grafted regenerated cellulose yarn, which belongs to the technical field of textile functional modification and ecological dyeing. Background technique [0002] Regenerated cellulose fiber is an important textile raw material. It is rich in sources, renewable, biodegradable and biocompatible. Regenerated cellulose textiles are moisture-absorbing, breathable, smooth and cool, non-static, and comfortable, and are favored by people. However, regenerated cellulose fiber has defects such as easy shrinkage, easy deformation, difficult to handle, and easy to breed bacteria; at the same time, the traditional dyeing of regenerated cellulose fiber requires the use of a large amount of inorganic salts, alkalis and dyeing accelerators in the dyeing solution to improve the dyeing properties. Dyeing rate and color fastness, and the dyeing process takes a long time, the temperature of the dyeing bath is hi...

Claims

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M14/04D06M15/03D06P1/38D06P1/41D06P1/46D06P1/52D06P3/66D06P3/60D06M101/06
CPCD06M14/04D06M15/03D06M2101/06D06P1/38D06P1/41D06P1/46D06P1/5257D06P3/6016D06P3/66
Inventor 李君军许云辉谈杰
Owner SHAOXING MAIBAO TECH CO LTD
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