A kind of preparation method of environment-friendly surface modified cotton fiber

A surface modification, cotton fiber technology, applied in the direction of plant fiber, fiber treatment, biochemical fiber treatment, etc., can solve the problems of high process equipment requirements, various finishing liquid components, etc., to achieve simple and easy control of the process, enhanced surface chemical activity, The effect of mild reaction conditions

Active Publication Date: 2021-05-07
SHAOXING MAIBAO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cotton fabric modified by trimethoxybenzoyl chitosan disclosed in the invention patent CN106521950A realizes the chemical grafting of chitosan and cotton fabric through organic polycarboxylic acid and amino silicone oil emulsion as crosslinking agent, which improves the cotton fabric Antibacterial and dyeing properties, but the finishing solution has many components, requiring complex finishing processes such as padding, pre-baking and high-temperature baking, and requires high process equipment

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 environment-friendly surface modified cotton fiber
  • A kind of preparation method of environment-friendly surface modified cotton fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Oxidized chitosan with a viscosity average molecular weight of 100,000, a degree of deacetylation of 95%, an aldehyde content of 23.16% at C2 and C3, and a carboxyl content of 40.69% at C6 was dissolved at 60°C in dilute In the acetic acid solution, be configured into the oxidized chitosan solution that mass concentration is 1%; Cotton fiber is put into the mixture of 1-ethyl-3-methylimidazolium acetate ionic liquid and deionized water that volume ratio is 1:1 In the mixed solution, treat it at 35°C for 2 hours to obtain swollen cotton fibers, add it to the chitosan solution at a bath ratio of 1:50, stir and react at 60°C for 2 hours, take out the cotton fibers and dry them at 70°C for 3 hours , to obtain oxidized chitosan grafted cotton fibers.

[0024] (2) Add oxidized chitosan grafted cotton fiber in the solution of 0.5% amino-terminated hyperbranched polymer (weight average molecular weight is 8275), stir and react at 45°C for 10min, after the reaction finishes,...

Embodiment 2

[0026] (1) Oxidized chitosan with a viscosity average molecular weight of 80,000, a degree of deacetylation of 93%, an aldehyde content of 31.58% at C2 and C3, and a carboxyl content of 40.69% at C6 was dissolved at 60°C in dilute In the acetic acid solution, be configured into the oxidized chitosan solution that mass concentration is 2%; Cotton fiber is put into the mixture of 1-ethyl-3-methylimidazole acetate ionic liquid and deionized water that volume ratio is 1:1 In the mixed solution, treat it at 40°C for 2 hours to obtain swollen cotton fibers, add it to the chitosan solution at a bath ratio of 1:50, stir and react at 70°C for 2 hours, take out the cotton fibers and dry them at 80°C for 3 hours , to obtain oxidized chitosan grafted cotton fibers.

[0027] (2) Add oxidized chitosan grafted cotton fiber in the solution of amino-terminated hyperbranched polymer (weight average molecular weight is 8275) of mass concentration 1%, stir reaction 15min at 60 ℃, after reaction f...

Embodiment 3

[0029](1) Oxidized chitosan with a viscosity-average molecular weight of 50,000, a degree of deacetylation of 92%, an aldehyde content of 31.58% at the C2 and C3 positions, and a carboxyl content of 51.71% at the C6 position was dissolved at 60°C in dilute In the acetic acid solution, be configured into the oxidized chitosan solution that mass concentration is 2%; Cotton fiber is put into the mixture of 1-ethyl-3-methylimidazole acetate ionic liquid and deionized water that volume ratio is 1:1 In the mixed solution, treat it at 40°C for 3 hours to obtain swollen cotton fibers, add it to the chitosan solution at a bath ratio of 1:50, stir and react at 80°C for 2 hours, take out the cotton fibers and dry them at 80°C for 3 hours , to obtain oxidized chitosan grafted cotton fibers.

[0030] (2) Add oxidized chitosan grafted cotton fiber in the solution of amino-terminated hyperbranched polymer (weight average molecular weight is 8275) of mass concentration 1%, stir reaction 25min...

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Abstract

The invention discloses a preparation method of environmentally friendly surface modified cotton fiber, which comprises grafting and oxidizing chitosan on cotton fiber in dilute acetic acid solution, and then grafting carboxyl and terminal amino groups in the cotton fabric through oxidizing chitosan It is obtained by amide chemical reaction of the amino group of the polymer. The method of the present invention is simple and easy, does not use chemical cross-linking agents, is environmentally friendly, and is compatible with the human body. The amino-terminated hyperbranched polymer on the surface of the modified cotton fabric prepared has a high grafting rate, good washing resistance, and long-lasting antibacterial properties. And after the protonation of the amino-terminated hyperbranched polymer, a layer of positive charges can be fixed on the surface of the cotton fiber, which can actively adsorb dyes without using inorganic salts and alkalis, and has high dyeing rate and color fastness. Therefore, it has a bright future in the field of salt-free ecological dyeing. broad.

Description

technical field [0001] The invention relates to a method for preparing environmentally friendly surface-modified cotton fibers, which belongs to the technical field of textile functional finishing and ecological dyeing. Background technique [0002] Cotton fiber is an important textile fiber material. Its products are cheap, moisture-absorbing, breathable, comfortable, biodegradable, safe and environmentally friendly, and are favored by people. However, cotton fabrics have a high shrinkage rate and are prone to wrinkling and deformation. In a humid environment, they are prone to mold and deterioration, and are corroded by bacteria, causing health problems. At the same time, the traditional dyeing of cotton fibers has the problems of low exhaustion rate and low color fixation rate. It is necessary to use a large amount of inorganic salts, alkalis and dyeing auxiliaries in the dyeing liquor to improve the dye uptake rate and color fastness of the dyes, and the dyeing process t...

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): D06M15/03D06M13/352D06M15/19D06P1/48D06P1/642D06P1/52D06P1/38D06P3/66D06M101/06
CPCD06M15/03D06M13/352D06M15/19D06M16/00D06P1/48D06P1/6426D06P1/52D06P1/38D06P3/66D06M2101/06
Inventor 李君军许云辉谈杰
Owner SHAOXING MAIBAO TECH CO LTD
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