Preparation method of antibacterial mildew-proof filter cotton

An antibacterial, mildew-proof, and filter cotton technology, which is applied in the field of filter materials, can solve the problems of filter cotton antibacterial performance decline, impact, and easy loss of antibacterial agents, and achieve good sound-absorbing effects, rich functions, and improved filter performance.

Active Publication Date: 2021-08-13
杭州诗蓝过滤科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is to overcome the traditional spraying method in the prior art to load the antibacterial agent on the surface of the filter cotton. On the one hand, the coating will affect the filtering effect of the filter cotton. On the other hand, the antibacterial agent loaded on the surface of the filter cotton is easy to lose, resulting in The antibacterial performance of filter cotton is reduced, and a method for preparing antibacterial and mildew-proof filter cotton is provided. Azido-modified nano-titanium dioxide is added to PET fibers. Nano-titanium dioxide can make filter cotton have good antibacterial and anti-mildew effects, and directly It is not easy to lose when added in the fiber; at the same time, the porous fiber can be made by decomposing the azide group under ultraviolet light, which can increase the specific surface area of ​​the fiber, thereby improving the electret performance of the fiber, improving the filtering effect of the filter cotton and making the filter cotton Has good sound-absorbing function

Method used

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  • Preparation method of antibacterial mildew-proof filter cotton

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method for antibacterial and mildew-proof filter cotton, comprising the steps of:

[0033] (1) Preparation of azide-modified nano-titanium dioxide:

[0034] A) Add ammonia water and γ-aminopropyltriethoxysilane with a mass concentration of 25% into water, stir evenly and add nano-titanium dioxide, ammonia water, γ-aminopropyltriethoxysilane, water and nano-titanium dioxide The ratio is 5mL: 8mL: 900mL: 8g, stirred and reacted at 80°C for 8h, filtered and cleaned to obtain amino-modified nano-titanium dioxide;

[0035] B) Dissolve p-azidobenzoic acid in dichloromethane, add N,N-dimethylformamide and oxalyl chloride, stir for 4 hours, then add amino-modified nano-titanium dioxide, p-azidobenzoic acid and dichloromethane , N,N-dimethylformamide, oxalyl chloride, and amino-modified nano-titanium dioxide are added at a ratio of 14g:250mL:12mL:3.5mL:5g, and the stirring reaction is continued for 12h, and the product is washed and dried to obtain the analyte Ni...

Embodiment 2

[0041] A preparation method for antibacterial and mildew-proof filter cotton, comprising the steps of:

[0042] (1) Preparation of azide-modified nano-titanium dioxide:

[0043] A) Add ammonia water and γ-aminopropyltriethoxysilane with a mass concentration of 28% into water, stir evenly and add nano-titanium dioxide, ammonia water, γ-aminopropyltriethoxysilane, water and nano-titanium dioxide The ratio is 4mL: 7mL: 800mL: 7g, stirred and reacted at 70°C for 9h, filtered and cleaned to obtain amino-modified nano-titanium dioxide;

[0044] B) Dissolve p-azidobenzoic acid in dichloromethane, add N,N-dimethylformamide and oxalyl chloride, stir and react for 3 hours, then add amino-modified nano-titanium dioxide, p-azidobenzoic acid and dichloromethane , N,N-dimethylformamide, oxalyl chloride, and amino-modified nano-titanium dioxide are added in a ratio of 13g:200mL:10mL:3mL:5g, and the stirring reaction is continued for 18h, and the product is washed and dried to obtain the azide...

Embodiment 3

[0050] A preparation method for antibacterial and mildew-proof filter cotton, comprising the steps of:

[0051] (1) Preparation of azide-modified nano-titanium dioxide:

[0052] A) Add ammonia water and γ-aminopropyltriethoxysilane with a mass concentration of 25% into water, stir evenly and add nano-titanium dioxide, ammonia water, γ-aminopropyltriethoxysilane, water and nano-titanium dioxide The ratio is 6mL: 9mL: 1000mL: 9g, stirred and reacted at 90°C for 7h, filtered and washed to obtain amino-modified nano-titanium dioxide; B) Dissolve p-azidobenzoic acid in dichloromethane, add N,N-di Methylformamide and oxalyl chloride, after stirring for 5 hours, add amino-modified nano-titanium dioxide, p-azidobenzoic acid, dichloromethane, N,N-dimethylformamide, oxalyl chloride, amino-modified nano-titanium dioxide The addition ratio is 15g: 300mL: 15mL: 4mL: 5g, and the stirring reaction is continued for 10h, and the product is washed and dried to obtain the azide-modified nano-ti...

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Abstract

The invention discloses a preparation method of antibacterial mildew-proof filter cotton. The preparation method comprises the following steps: (1) preparation of azido-modified nanometer titanium dioxide; (2) preparation of modified PET master batches: uniformly mixing PET slices with the azido-modified nanometer titanium dioxide, and conducting extruding and granulating to obtain the modified PET master batches; (3) melt-blowing: uniformly mixing the modified PET master batches and electret master batches, carrying out extruding and melting, feeding a formed melt to a spinning assembly for spinning, and forming fine fibers under the traction action of hot air; (4) ultraviolet irradiation: performing ultraviolet irradiation on the obtained fine fibers to obtain porous fibers; and (5) forming: carrying out web forming, electret formation and rolling on the porous fibers to obtain the antibacterial mildew-proof filter cotton. The azido-modified nanometer titanium dioxide is added into PET fibers, so the antibacterial property, the filtering property and the mechanical property of the filter cotton can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of filter materials, in particular to a preparation method of antibacterial and mildew-proof filter cotton. Background technique [0002] With the development of industry, air pollution is becoming more and more serious, and the demand for air purification is also increasing. In air purifiers such as purifiers, air conditioners, and fresh air systems, the most critical structure is the filter cotton. The quality of the filter cotton determines the purification effect of the air purifier. The filter cotton in the purifier needs to have a certain antibacterial and anti-mildew function, so as to avoid the growth of bacterial colonies after absorbing more particles and reduce the service life of the filter cotton. [0003] In the prior art, in order to make the filter cotton have a good antibacterial and antifungal function, generally the antibacterial agent is sprayed on the surface of the filter cotton, for e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14B01D46/00D01F6/92D01F1/10D06M10/00D06M10/02D06M101/32
CPCB01D39/14B01D46/0001B01D46/0028D01F6/92D01F1/106D06M10/001D06M10/025D06M2101/32
Inventor 李昌稳张静
Owner 杭州诗蓝过滤科技有限公司
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