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Surface antibacterial modification method for non-woven fabric by plasma grafted chitosan oligosaccharide derivative

A plasma and surface antibacterial technology, which is applied in physical treatment, biochemical fiber treatment, textiles and papermaking, etc., can solve the problem that the antibacterial effect cannot maintain good persistence, the distribution of antibacterial agents is difficult to control in fiber-forming conditions, and the antibacterial agents cannot be achieved. Antibacterial effect and other problems, to achieve the effect of shortening the modification time, reducing the amount of chemicals, and excellent antibacterial performance

Inactive Publication Date: 2019-08-27
THIRD INST OF OCEANOGRAPHY MINIST OF NATURAL RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the antibacterial agent is blended with the polymer, the fiber-forming conditions and the distribution of the antibacterial agent in the fiber are relatively difficult to control
The antibacterial agent inside the fiber obtained by blend spinning cannot contact with bacteria, a large amount of antibacterial agent cannot achieve antibacterial effect, and the utilization efficiency of antibacterial agent is low
In addition, the use of inorganic antibacterial agents (metals such as silver, copper, and zinc) in fibers also has problems such as migration of antibacterial agents. On the one hand, the antibacterial effect cannot maintain good persistence; secondary pollution

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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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] The preparation steps of chitosan oligosaccharide derivative are:

[0024] (1) Synthesis of kojic acid: kojic acid and thionyl chloride react in an ice bath to generate kojic acid;

[0025] (2) Dissolve 1-2mol of clokojic acid in 1mol of chitosan oligosaccharide aqueous solution, react for 3-5h while stirring at 25-35°C, and then cool to room temperature;

[0026] (3) Add 20mL of acetone into the mixed solution to terminate the reaction and generate a brown precipitate, then filter and separate the product;

[0027] (4) Ethanol Soxhlet extraction method removes excess acetone;

[0028] (5) Dialyze in distilled water for 24 h with a regenerated cellulose membrane, and dry to obtain a vacuum-purified oligochitosan-clokojic acid derivative.

Embodiment 1

[0030] (1) Arrange the non-woven fabric on the plasma processor, spray the plasma onto the surface of the non-woven fabric in an open environment, make the non-woven fabric move in the plasma atmosphere, the distance between the electrodes is 1mm, and the processing power is 25KJ / m 2 , the frequency is 20KHz, the processing time is 5s, resulting in surface modification;

[0031] (2) The non-woven fabric treated with plasma is transported by a roller to a 2g / L mass fraction of 1.5% chitosan oligosaccharide derivative grafting aqueous solution, and then the ungrafted chitosan oligosaccharide and its derivatives are removed by extrusion rollers. material, the extrusion pressure was set at 2bar. Then the grafted non-woven fabric was vacuum-dried at 40 °C to constant weight.

[0032] (3) Escherichia coli (representative of enteric bacteria) and Staphylococcus aureus (representative of pyogenic bacteria) were used to perform the shaking flask test at the same time. The count of li...

Embodiment 2

[0034] (1) Arrange the non-woven fabric on the plasma device, spray the plasma onto the surface of the non-woven fabric in an open environment, make the non-woven fabric move in the plasma atmosphere, the distance between the electrodes is 1.5mm, and the processing power is 45KJ / m 2 , the frequency is 26KHz, and the processing time is 10s, resulting in surface modification;

[0035] (2) The plasma-treated non-woven fabric is transported into 3g / L chitosan oligosaccharide and its derivative grafting liquid by roller, then removes ungrafted chitosan oligosaccharide and its derivative by extrusion roller, squeezes The outlet pressure is set at 3bar. Then the grafted non-woven fabric was vacuum-dried at 50 °C to constant weight.

[0036] (3) Escherichia coli (representative of enteric bacteria) and Staphylococcus aureus (representative of pyogenic bacteria) were used to perform the shaking flask test at the same time. The count of live bacteria in the group without samples was...

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Abstract

The invention relates to a surface antibacterial modification method for a non-woven fabric by plasma grafted chitosan oligosaccharide and a derivative thereof. The method comprises the steps of taking the chitosan oligosaccharide and the derivative thereof as surface grafting materials of a non-woven fabric; carrying out surface modification on the non-woven fabric by stopping discharge plasma through an atmospheric air medium; and then combining the chitosan oligosaccharide with the derivative thereof by covalent bonds.

Description

technical field [0001] The invention belongs to a method for surface antibacterial modification of non-woven fabric plasma grafted chitosan oligosaccharide derivatives, and belongs to the technical field of special fiber preparation. Background technique [0002] Chitosan is composed of glucosamine and N-acetylglucosamine connected by β-1,4-glucosidic bonds, and is the second largest natural biological polysaccharide after cellulose. Chitosan has the characteristics of biological non-toxicity, natural degradability, and good biocompatibility. In addition, chitosan also exhibits certain antibacterial activity. A large number of studies have confirmed that chitosan can inhibit the growth of various microorganisms. Grow and multiply. Chitooligosaccharide is a low molecular weight basic amino oligosaccharide with a polymerization degree of 2-10 obtained after the chitosan main chain is broken by physical, chemical or enzymatic degradation. In addition to the excellent physiolo...

Claims

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Application Information

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IPC IPC(8): D06M10/02D06M15/03C08B37/08D06M101/20D06M101/22D06M101/30D06M101/34D06M101/32D06M101/26
CPCC08B37/003D06M10/025D06M15/03D06M16/00D06M2101/20D06M2101/22D06M2101/26D06M2101/30D06M2101/32D06M2101/34
Inventor 吴鹏刘源森徐长安唐旭林凌刘维维
Owner THIRD INST OF OCEANOGRAPHY MINIST OF NATURAL RESOURCES
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