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A kind of chitosan/ag+ composite antibacterial finishing liquid and its preparation method and application

A compound antibacterial and chitosan technology, which is applied in liquid/gas/steam textile material treatment, fiber treatment, textiles and papermaking, etc. It can solve the problem that chitosan cannot be stably combined with cotton fabrics, cannot form strong chemical bonds, and fabrics are resistant to washing Poor resistance and other problems, to achieve significant antibacterial effect, improved anti-wrinkle, and significant antibacterial rate

Inactive Publication Date: 2016-05-25
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But Ag + Unstable in the air, easy to oxidize and turn black, can only physically adsorb with fabrics, cannot form strong chemical bonds or stable chelation, has poor binding ability with fabrics, and poor washing resistance of fabrics
[0004] In the prior art, chitosan and Ag + combined to form fabric antibacterial agents, but chitosan and Ag + The consumption of chitosan is large, and chitosan cannot be stably combined with cotton fabrics, resulting in that when antibacterial agents are applied to cotton fabrics, the antibacterial effect of cotton fabrics is greatly reduced after washing

Method used

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  • A kind of chitosan/ag+ composite antibacterial finishing liquid and its preparation method and application
  • A kind of chitosan/ag+ composite antibacterial finishing liquid and its preparation method and application
  • A kind of chitosan/ag+ composite antibacterial finishing liquid and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Chitosan / Ag + Preparation of composite antibacterial finishing solution:

[0028] Weigh 0.3g of chitosan, the chitosan has a molecular weight of 100,000 and a deacetylation degree of 95%. Add the weighed chitosan into 1000mL citric acid solution with a mass concentration of 1%, stir magnetically at a constant temperature of 25°C for 2h, oscillate ultrasonically for 30min, and then let stand at 4°C for 12h.

[0029] Add 0.3 mg of silver nitrate to the above mixed solution under magnetic stirring, then adjust the pH value of the mixed solution to 6.2 with sodium hydroxide solution (concentration: 1mol / L), continue magnetic stirring for 2 hours, and ultrasonically oscillate at 50°C for 6 hours to obtain chitosan / Ag + Compound antibacterial finishing solution.

[0030] 2. Preparation of antibacterial cotton fabric:

[0031] Soak the desized, scoured and bleached cotton fabric into the chitosan / Ag + In the composite antibacterial finishing solution, the bath ratio i...

Embodiment 2

[0040] 1. Chitosan / Ag + Preparation of composite antibacterial finishing solution:

[0041] Weigh 0.6g of chitosan, the chitosan has a molecular weight of 100,000 and a deacetylation degree of 95%. Add the weighed chitosan into 1000mL citric acid solution with a mass concentration of 1%, stir magnetically at a constant temperature of 25°C for 2h, oscillate ultrasonically for 35min, and then stand at 4°C for 12.5h.

[0042] Add 0.6 mg of silver nitrate to the above mixed solution under magnetic stirring, then adjust the pH value of the mixed solution to 6.2 with sodium hydroxide solution (concentration: 1mol / L), continue magnetic stirring for 2 hours, and ultrasonically oscillate at 50°C for 6.5 hours to obtain chitosan Sugar / Ag + Compound antibacterial finishing solution.

[0043] 2. Preparation of antibacterial cotton fabric:

[0044] Soak the desized, scoured and bleached cotton fabric into the chitosan / Ag +In the composite antibacterial finishing solution, the bath rat...

Embodiment 3

[0054] 1. Chitosan / Ag + Preparation of composite antibacterial finishing solution:

[0055] Weigh 0.9g of chitosan, the chitosan has a molecular weight of 100,000 and a deacetylation degree of 95%. Add the weighed chitosan into 1000mL citric acid solution with a mass concentration of 1%, stir magnetically at a constant temperature of 25°C for 2h, oscillate ultrasonically for 40min, and then stand at 4°C for 12.5h.

[0056] Add 0.9 mg of silver nitrate to the above mixed solution under magnetic stirring, then adjust the pH value of the mixed solution to 6.2 with sodium hydroxide solution (concentration: 1mol / L), continue magnetic stirring for 2 hours, and ultrasonically oscillate at 50°C for 6.5 hours to obtain chitosan Sugar / Ag + Compound antibacterial finishing solution.

[0057] 2. Preparation of antibacterial cotton fabric:

[0058] Soak the desized, scoured and bleached cotton fabric into the chitosan / Ag + In the composite antibacterial finishing solution, the bath ra...

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 relates to the technical field of textile antibacterial finishing agents, and in particular relates to a chitosan / Ag <+> composite antibacterial finishing liquid and a preparation method and application thereof in antibacterial cotton fabrics, the preparation method comprises the following steps: first adding chitosan into a citric acid solution for thermostatic magnetic stirring for 1 to 3 hours, then performing ultrasonic oscillation for 20-50 minutes, and standing at 0-4 DEG C for 10 to 14 hours; while magnetic stirring, adding silver nitrate into the chitosan and citric acid mixed solution, using a sodium hydroxide solution to adjust the pH value of the mixed solution to 5.5-6.5, continuing magnetic stirring for 1.5-2.5 hours, and then performing ultrasonic oscillation at 45-55 DEG C for 5-7 hours. According to the preparation method of the chitosan / Ag <+> composite antibacterial finishing liquid, citric acid is chosen, the citric acid is a solvent of the chitosan, is also a crosslinking agent between the chitosan and the cotton fabrics, and can ensure that after repeated washing, the antibacterial cotton fabrics still have significant antibacterial rate, and after 50 times of washing, the antibacterial effect is still obvious.

Description

technical field [0001] The invention relates to the technical field of textile antibacterial finishing agents, in particular to a chitosan / Ag + Composite antibacterial finishing liquid, its preparation method and application in antibacterial cotton fabric. Background technique [0002] Chitosan is a deacetylated derivative of chitin, which has good broad-spectrum antibacterial properties. There are many active groups such as amino groups and hydroxyl groups on the macromolecular chain, which are very easy to chelate with transition metal ions and have high antibacterial properties. reactivity. It widely exists in the shells of shrimps and crabs. It is rich in resources, non-toxic and non-polluting. It is a natural antibacterial agent and has been widely used in the antibacterial finishing of textiles. However, compared with inorganic antibacterial agents, chitosan has lower antibacterial activity, can only inhibit the generation of bacteria, and is difficult to kill bacter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M13/207D06M15/03D06M11/65D06B3/18D06B15/00D06M101/06
Inventor 马艳丽刘茜耿佃东杨娜钱如山
Owner SHANGHAI UNIV OF ENG SCI