Ecological dyeing antibacterial cotton fabric preparation method

An ecological dyeing and cotton fabric technology, applied in dyeing method, physical treatment, plant fiber, etc., can solve the problems of high requirements for process equipment, many components of finishing liquid, complex synthesis process, etc., and achieve less dye consumption and heat movement The effect of faster speed and simple process

Active Publication Date: 2020-09-15
SHAOXING MAIBAO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Scholars at home and abroad have synthesized chitosan polyether compound PEG-CS by modifying chitosan, which has good water solubility, and there are a large number of amino groups on its macromolecular chain. The adsorption capacity of dyes realizes the salt-free dyeing of reactive dyes, but the synthesis of chitosan polyether segments requires 24 hours of reaction at room temperature and 48 hours of dialysis. - The baking process pre-treats cotton fabrics, and high-temperature baking at 110°C has effects on the mechanical properties and handle of cotton fabrics [Sang-Hoon L, Samuel M H. Application of a fiber-reactive chitosan derivativeto cotton fabric as a zero -salt dyeing auxiliary. Coloration Technology,2004, 120: 108-113; Liao Bo,...

Method used

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  • Ecological dyeing antibacterial cotton fabric preparation method

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Experimental program
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Effect test

Embodiment 1

[0024] (1) Add oxidized chitosan with a viscosity-average molecular weight of 120,000, a deacetylation degree of 93.5%, and an aldehyde content of 18.64% to a dilute acetic acid solution with a pH of 4.5 at 60°C and stir to dissolve to obtain a mass concentration of 1.5% Oxidized chitosan solution;

[0025] (2) Immerse the desized and scorched cotton fabric in a NaOH solution with a mass concentration of 15%, microwave-assisted treatment at 30°C for 3 minutes (microwave power is 268W), and then wash it with deionized water until it is neutral. pretreated cotton fabrics;

[0026] (3) Add the pretreated cotton fabric to the oxidized chitosan solution at a bath ratio of 1:50, and keep stirring at 70°C for 2 hours to make the hemiacetal reaction between the oxidized chitosan and the cotton fabric to obtain antibacterial Modified cotton fabric; after the reaction, the modified cotton fabric was vacuum-dried at 60°C for 4 hours, fully washed with deionized water, dehydrated, and dr...

Embodiment 2

[0028] (1) Add oxidized chitosan with a viscosity-average molecular weight of 120,000, a deacetylation degree of 93.5%, and an aldehyde content of 26.57% to a dilute acetic acid solution with a pH of 4.5 at 60°C and stir to dissolve to obtain a mass concentration of 1.5% Oxidized chitosan solution;

[0029] (2) Immerse the desizing and scouring cotton fabric in NaOH solution with a mass concentration of 15%, microwave-assisted treatment at 30°C for 3 minutes (microwave power is 300W), and then wash with deionized water until neutral. pretreated cotton fabrics;

[0030] (3) Add pretreated cotton fabric to the oxidized chitosan solution at a bath ratio of 1:50, and continue to stir at 70°C for 2 hours to allow hemiacetal reaction between oxidized chitosan and cotton fabric to obtain antibacterial Modified cotton fabric; after the reaction, the modified cotton fabric was vacuum-dried at 60°C for 4 hours, fully washed with deionized water, dehydrated, and dried, and then added to...

Embodiment 3

[0032] (1) Add oxidized chitosan with a viscosity-average molecular weight of 120,000, a degree of deacetylation of 93.5%, and an aldehyde content of 41.56% to a dilute acetic acid solution with pH=4.0 at 60°C and stir to dissolve it to obtain a mass concentration of 2.0% Oxidized chitosan solution;

[0033] (2) Immerse the desizing and scouring cotton fabric in NaOH solution with a mass concentration of 15%, microwave-assisted treatment at 30°C for 3 minutes (microwave power is 380W), and then wash it with deionized water until neutral. pretreated cotton fabrics;

[0034] (3) Add pretreated cotton fabric to the oxidized chitosan solution at a bath ratio of 1:50, and continue to stir at 70°C for 2 hours to allow hemiacetal reaction between oxidized chitosan and cotton fabric to obtain antibacterial Modified cotton fabric; after the reaction, the modified cotton fabric was vacuum-dried at 60°C for 4 hours, fully washed with deionized water, dehydrated, and dried, and then adde...

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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Abstract

The invention discloses an ecological dyeing antibacterial cotton fabric preparation method. An antibacterial cotton fabric is obtained by carrying out a hemiacetal reaction on aldehyde groups at C6 positions in oxidized chitosan molecules and hydroxyl groups in cotton fabric, and then carrying out salt-free dyeing with reactive dyes. The oxidized chitosan modified cotton fabric prepared by the invention has durable and efficient antibacterial activity and good salt-free dyeing performance, has good affinity with human bodies, is green and environmentally friendly, overcomes the problem of environmental pollution caused by using a large amount of inorganic salts and electrolytes in conventional dyeing of cotton fabrics, and has practical application potential.

Description

technical field [0001] The invention relates to a method for preparing an ecologically dyed antibacterial cotton fabric, belonging to the technical field of cellulose fabric dyeing and finishing. Background technique [0002] Cotton fiber is favored by people because of its good human affinity, comfortable wearing, moisture absorption and breathability, wide range of sources, renewable and easy biodegradation. However, cotton fiber has a large specific surface area and strong hygroscopicity, which creates suitable conditions for the reproduction and spread of microorganisms, resulting in damage to fiber mechanics, mold, and odor, and also causes harm to human health. With the increasing awareness of people's hygiene and health, the development of safe, environmentally friendly and durable antibacterial functional textiles has become an urgent problem to be solved. Cotton fibers dyed with reactive dyes have problems of low exhaustion rate and low color fixation rate, so it i...

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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IPC IPC(8): D06M15/03D06M11/38D06M10/00D06P1/38D06P1/46D06P3/66D06M101/06
CPCD06M15/03D06M11/38D06M10/003D06M16/00D06P1/38D06P1/46D06P3/66D06M2101/06Y02A50/30
Inventor 李君军许云辉解新生谈杰
Owner SHAOXING MAIBAO TECH CO LTD
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