Nano-antibacterial composite fibers for non-woven fabric processing and preparation method thereof

A technology of composite fibers and non-woven fabrics, applied in the fields of fiber chemical characteristics, rayon manufacturing, textiles and papermaking, etc., can solve the problem of reducing the breaking strength of chitosan fibers, low mechanical strength of chitosan fibers, and antibacterial effect of fiber fabrics Decay and other problems, to achieve the effect of reducing detachment and dissolution, enhancing antibacterial effect and antibacterial life, enhancing dimensional stability and mechanical properties

Pending Publication Date: 2021-12-17
孙大伟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Non-woven fabrics that are in close contact with the human body will inevitably be contaminated with microorganisms during use, and the non-woven fabric itself will become a place for microorganisms to multiply. The balance of microorganisms is destroyed, causing microorganisms to multiply on the surface of the skin. The bacteria on the textiles use the dander on the skin surface and textile fibers as nutrients to reproduce, and at the same time metabolize various low-level fatty acids, ammonia and other volatile substances with irritating odors. The secretions of the microorganisms themselves and the secretions of the human body will cause the textiles to produce stench and affect hygiene.
[0004] Although the non-woven fabrics on the market can make the fabric have an antibacterial effect by mixing antibacterial finishing agents with non-woven fibers, the existing antibacterial non-woven fabrics are easy to dissolve from the surface of the fabric due to the antibacterial agent, making the antibacterial properties of the fabric The effect gradually deteriorates, especially as the number of washings increases, the antibacterial effect of these fiber fabrics rapidly declines or fails. easy to break
The main reason restricting the development of chitosan antibacterial fiber at present is that the mechanical strength of chitosan fiber is not high, the breaking strength of chitosan fiber obtained by conventional spinning is only 1.4-2.0cN / dtex, and the precipitation of antibacterial finishing agent Reduced breaking strength of chitosan fibers

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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  • Nano-antibacterial composite fibers for non-woven fabric processing and preparation method thereof
  • Nano-antibacterial composite fibers for non-woven fabric processing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of nano antibacterial composite fiber for non-woven fabric processing, comprising the steps of:

[0028] S1. Add 2kg of nano-titanium dioxide into 40kg of water, ultrasonically disperse for 5 minutes, use concentrated sulfuric acid to adjust the pH of the system to 2.5-4, add 3kg of maleic anhydride, stir at 60°C for 5 hours under nitrogen protection, filter with suction, and wash with methanol once. Dried in an oven at 50°C, pulverized to obtain grafted nano-powder;

[0029] S2. Add 5kg of chitosan to 70kg of acetic acid solution with a concentration of 0.5mol / L and stir evenly. Under nitrogen protection, add 4kg of acrylic acid and 3kg of grafted nano-powder and stir evenly. Add 1kg of hydrogen peroxide and react at 40°C. 10h, obtain blending solution;

[0030] S3. Extrude the blended solution from a spinneret hole with an aperture of 0.75 mm at a rate of 8 mm / min through a frequency conversion stepper, and enter it into an oxalic acid solution w...

Embodiment 2

[0032] A preparation method of nano antibacterial composite fiber for non-woven fabric processing, comprising the steps of:

[0033] S1. Add 6kg of nano-titanium dioxide into 20kg of water, ultrasonically disperse for 10min, use concentrated sulfuric acid to adjust the pH of the system to 2.5-4, add 1kg of maleic anhydride, under nitrogen protection, stir at 80°C for 2h, filter with suction, wash with methanol 4 times, Dried in an oven at 40°C and pulverized to obtain grafted nanopowder;

[0034] S2. Add 15kg of chitosan to 50kg of acetic acid solution with a concentration of 1.2mol / L and stir evenly. Under nitrogen protection, add 1kg of acrylic acid and 6kg of grafted nano-powder and stir evenly. Add 0.1kg of ammonium persulfate and heat at 60°C. React for 5h to obtain a blended solution;

[0035] S3. Extrude the blended solution from a spinneret hole with an aperture of 0.65 mm at a rate of 10 mm / min through a frequency-variable stepper, and enter it into an oxalic acid so...

Embodiment 3

[0037] A preparation method of nano antibacterial composite fiber for non-woven fabric processing, comprising the steps of:

[0038] S1. Add 3kg of nano-titanium dioxide into 35kg of water, ultrasonically disperse for 6 minutes, use concentrated sulfuric acid to adjust the pH of the system to 2.5-4, add 2.5kg of maleic anhydride, stir at 65°C for 4 hours under nitrogen protection, filter with suction, and wash with methanol twice , dried in an oven at 47°C, and pulverized to obtain grafted nano-powder;

[0039] S2. Add 8kg of chitosan to 65kg of acetic acid solution with a concentration of 0.8mol / L and stir evenly. Under nitrogen protection, add 3kg of acrylic acid and 4kg of grafted nano-powder and stir evenly. Add 0.8kg of potassium persulfate and heat at 45°C. Reaction 8h, obtain blending solution;

[0040] S3, the blended solution is extruded from the spinneret hole with an aperture of 0.7mm at a rate of 8.5mm / min by a frequency conversion stepper, and solidified into an ...

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 a preparation method of nano-antibacterial composite fibers for non-woven fabric processing. The preparation method comprises the following steps that nano titanium dioxide is added into water, ultrasonic dispersion is carried out for 5-10 minutes, the pH value of a system is adjusted to 2.5-4, maleic anhydride is added, stirring is carried out for 2-5 hours at 60-80 DEG C under the protection of nitrogen, suction filtration and washing are carried out, drying is carried out at 40-50 DEG C, and crushing is carried out to obtain grafted nano powder; chitosan is added into an acetic acid solution for being uniformly stirred, acrylic acid and the grafted nano-powder are added into the acetic acid solution under the protection of nitrogen, uniformly stirring is carried out, an initiator is added, and reacting is carried out at 40-60 DEG C for 5-10 hours to obtain a blended solution; and the blended solution is extruded from a spinneret orifice with the aperture of 0.65-0.75 mm through a variable-frequency stepper at the speed of 8-10mm / min, the blended solution enters an oxalic acid solution for solidification forming, then water washing, drafting and room-temperature drying are sequentially carried out until the weight is constant, and the nano-antibacterial composite fibers for the non-woven fabric processing are obtained.

Description

technical field [0001] The invention relates to the technical field of non-woven fabrics, in particular to a nano antibacterial composite fiber for non-woven fabric processing and a preparation method thereof. Background technique [0002] Chitosan is the product of deacetylation of chitin, and it is the most basic and important derivative of chitin. Chitin, also known as chitin, chitin, chemical name (1,4)-2-acetamide-2-deoxy-β-D-glucan, mainly exists in the shell of shrimp, crab, pupa and insects And in the cell walls of fungi and algae. Chitosan has the advantages of non-toxic, biodegradable, and good biocompatibility, which makes it have broad research and application prospects in the fields of textiles, biomaterials, drug carriers, medical, environmental protection, and health products, especially in non-woven fabrics. In cloth, it is widely used. [0003] Non-woven fabrics that are in close contact with the human body will inevitably be contaminated with microorgani...

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): D01F6/52D01F1/10C08F251/00C08F220/06
CPCD01F6/52D01F1/103C08F251/00C08F220/06
Inventor 孙大伟
Owner 孙大伟
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