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Preparation method of active chitosan modified cotton fabric

A cotton fabric and active shell technology, which is applied in the field of preparation of active chitosan-modified cotton fabrics, can solve the problems of poor hand feel and strength of cotton fabrics, high requirements for process equipment, and various components of finishing liquids, etc. degree, improve grafting efficiency, enhance antibacterial activity and wash resistance

Pending Publication Date: 2021-01-01
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the lack of chemical bonds between chitosan and cotton fibers, it is necessary to dissolve chitosan in an acidic solution containing a cross-linking agent, and make it Chitosan is grafted on cotton fiber, but high temperature baking makes the cotton fabric feel and strength worse, and the chemical crosslinking agent coated on the surface of natural cotton fiber has a negative impact on the human body [Wang Jiangang, Wang Yali, Ge Mingqiao, et al. Antibacterial finishing of cotton fabrics with acid and chitosan. Acta Textile Sinica, 2006,27(1):89-92]
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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  • Preparation method of active chitosan modified cotton fabric
  • Preparation method of active chitosan modified cotton fabric
  • Preparation method of active chitosan modified cotton fabric

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Soak the desized cotton fabric in the mixed medium of 1-ethyl-3-methylimidazolium bisulfate ionic liquid and deionized water with a volume ratio of 7:3, and take it out after swelling at 40°C for 2 hours Cotton fabric, then add active chitosan with a viscosity-average molecular weight of 82,000, a degree of deacetylation of 94.6%, an aldehyde content of 23.18% at C2 and C3, and a carboxyl content of 56.05% at C6, and stir at 70°C until completely Dissolved and configured into an active chitosan solution with a mass concentration of 1%.

[0025] (2) Add the swollen cotton fabric into the active chitosan solution at a bath ratio of 1:50, and continue to stir and react for 2 hours at 45°C. After the reaction, take out the cotton fabric and rinse it with deionized water for 6 times. °C in a vacuum oven for 3 hours to obtain active chitosan-modified cotton fabrics. After testing, the grafting rate of chitosan in the active chitosan modified cotton fabric obtained in thi...

Embodiment 2

[0027] (1) Soak the desized cotton fabric in the mixed medium of 1-ethyl-3-methylimidazolium bisulfate ionic liquid and deionized water with a volume ratio of 4:1, and take it out after swelling at 45°C for 2 hours Cotton fabric, then add active chitosan with a viscosity average molecular weight of 39,000, a degree of deacetylation of 91.4%, an aldehyde content of 29.43% at C2 and C3, and a carboxyl content of 56.05% at C6, and stir at 70°C until completely Dissolve and configure the active chitosan solution with a mass concentration of 2%.

[0028] (2) Add the swollen cotton fabric into the active chitosan solution at a bath ratio of 1:50, and continue to stir and react for 2 hours at 50°C. After the reaction, take out the cotton fabric and rinse it with deionized water for 8 times, °C in a vacuum oven for 3 hours to obtain active chitosan-modified cotton fabrics. After testing, the grafting rate of chitosan in the active chitosan modified cotton fabric obtained in this exam...

Embodiment 3

[0030] (1) Soak the desized cotton fabric in the mixed medium of 1-ethyl-3-methylimidazolium bisulfate ionic liquid and deionized water with a volume ratio of 4:1, and take it out after swelling at 50°C for 2 hours Cotton fabric, then add active chitosan with a viscosity-average molecular weight of 39,000, a degree of deacetylation of 91.4%, an aldehyde content of 29.43% at C2 and C3, and a carboxyl content of 56.05% at C6, and stir at 70°C until completely Dissolve and configure the active chitosan solution with a mass concentration of 2%.

[0031](2) Add the swollen cotton fabric into the active chitosan solution at a bath ratio of 1:50, and continue to stir and react for 2 hours at 60°C. After the reaction, take out the cotton fabric and rinse it with deionized water for 8 times, °C in a vacuum oven for 4 hours to obtain active chitosan-modified cotton fabrics. After testing, the chitosan grafting rate in the active chitosan modified cotton fabric obtained in this example ...

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Abstract

The invention discloses a preparation method of an active chitosan modified cotton fabric. The preparation method comprises the following steps of wetting and swelling a cotton fabric in a mixed medium of 1-ethyl-3-methylimidazolium bisulfate ionic liquid and deionized water, taking out the fabric, and adding active chitosan to dissolve; and forming hemiacetal chemical bonds through reacting between hydroxyl in the cotton fabric with aldehyde groups of the active chitosan. The preparation method is simple and easy to implement, high in grafting rate, free of chemical cross-linking agents and environment-friendly, the prepared active chitosan modified cotton fabric is efficient and durable in antibiosis, good in washing resistance, high in wearing comfort and friendly to the human body, andtherefore the actual application prospect is wide.

Description

technical field [0001] The invention relates to a preparation method of active chitosan modified cotton fabric, which belongs to the technical field of textile functional finishing. Background technique [0002] Cotton fiber is an important raw material of my country's textile industry. Its fabric is cheap, moisture-absorbing, breathable, comfortable, easy to dye and process, safe and environmentally friendly, and harmless to the human body. However, cotton fabric has a large shrinkage rate, is easy to wrinkle and deform, and is easy to mold and deteriorate in a humid environment, causing bacterial infection in the human body and causing health problems. Therefore, it is urgent to carry out antibacterial and disease-proof finishing on cotton spinning products and develop safe and hygienic high-efficiency antibacterial textiles to protect human health. [0003] Antibacterial finishing agents currently used for cotton fabrics mainly include inorganic antibacterial agents, org...

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 Applications(China)
IPC IPC(8): D06M15/03D06M13/473D06M101/06
CPCD06M15/03D06M13/473D06M16/00D06M2101/06D06M2200/50
Inventor 汪泳李日新许云辉张月郑宏飞
Owner ANHUI AGRICULTURAL UNIVERSITY
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