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Method for preparing complex antimicrobial agent by blending chitosan and silver copper

A technology of compound antibacterial agent and chitosan, which is applied in the field of preparation of compound antibacterial agent, achieves the effects of good thermal stability, natural stability and good antibacterial performance

Inactive Publication Date: 2014-11-19
TAIYUAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Copper is added to solve the amount of silver used in existing products. In the preparation process, no additional chemical reagents such as reducing agents are required to obtain a green new composite antibacterial agent with good antibacterial performance and low cost, thereby providing a chitosan and silver compound. Method for preparing composite antibacterial agent by copper blending

Method used

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  • Method for preparing complex antimicrobial agent by blending chitosan and silver copper
  • Method for preparing complex antimicrobial agent by blending chitosan and silver copper
  • Method for preparing complex antimicrobial agent by blending chitosan and silver copper

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) 0.004g silver nitrate is dissolved in 25ml deionized water, 0.94g copper nitrate is dissolved in 100ml deionized water, the concentration ratio is 1:50, and the volume ratio is 1:3 for mixing;

[0032] (2) Put the mixed solution in a constant temperature stirrer, stir for 1 hour at 40°C at a speed of 25r / min, raise the temperature to 50°C, and stir for another 1h at a speed of 25r / min;

[0033] (3) Raise the temperature to 60°C and add 0.5g of chitosan solid at a speed of 25r / min and stir for 0.5h to form a light blue suspension;

[0034] (4) After cooling, filter the suspension with suction, dry it completely in a 60°C incubator, and grind it to obtain a light blue powdery compound antibacterial agent.

[0035] Obtain by above-mentioned preparation method and be made up of chitosan and silver nitrate and copper nitrate, the ratio of the concentration of silver nitrate and copper nitrate is 1:50 according to its content ratio, and the volume ratio is 1:3, generates...

Embodiment 2

[0038]According to the processing method of embodiment 1, the difference of embodiment 2 is: the concentration ratio of silver nitrate and copper nitrate solution is 1:50, and its volume ratio becomes 1:2, generates the composite compound of chitosan and silver-copper blend. Antibacterial agents. The antibacterial circle test shows that the diameter of the antibacterial circle is 8 mm, and its antibacterial effect is far inferior to that of Example 1.

Embodiment 3

[0040] According to the processing method of embodiment 1, the difference of embodiment 3 is: the concentration ratio of silver nitrate and copper nitrate solution is 1:50, and its volume ratio becomes 1:1, generates the composite compound of chitosan and silver-copper blend. Antibacterial agents. The antibacterial circle test shows that the diameter of the antibacterial circle is 7 mm, and its antibacterial effect is far inferior to that of Example 1.

[0041]

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Abstract

The invention relates to a method for preparing a complex antimicrobial agent by blending chitosan and silver copper. The method comprises the following steps: silver nitrate and cupric nitrate are blended according to the concentration ratio of 1:30 to 1:80, and then are blended with chitosan. Therefore, a light blue antibacterial agent powder is prepared. According to the method provided by the invention, the usage amount of silver is reduced, the chitosan is also used as a reducing agent, chemical reagents are no longer added, and the toxicity of an antibacterial agent is reduced. Due to the change of technological conditions, the oxidation-reduction reaction of the chitosan and the cupric nitrate can be performed sufficiently, an aldehyde group (-CHO) is generated in the reaction, Ag<+> is enabled to be completely reduced to elemental silver, Cu<2+> is hibernated in a chitosan basal body, so as to play a synergistic antibacterial effect, a remarkable inhibiting effect on escherichia coli and staphylococcus aureus is detected through an inhibition ring test, an inhibition ring which is equal to or greater than 10 mm is formed under a culture condition of 37 DEG C, a remarkable bacteriostatic effect is played, materials used cause no harm to human body, the price is low, and the novel complex antimicrobial agent is green and environment-friendly.

Description

technical field [0001] The invention relates to a preparation method of a composite antibacterial agent, in particular to a preparation method of a composite antibacterial agent blended with chitosan and silver and copper for textile. Background technique [0002] The existing antibacterial preparation of chitosan with antibacterial properties usually adopts Ag as the main antibacterial substance. [0003] Chitosan is a natural green alkaline polysaccharide that exists in large quantities in the biological world. It has a large number of active groups such as hydroxyl and amino groups, and is easy to chelate metal ions. And it has unique biocompatibility, biodegradability, antibacterial, non-toxic, biological activity and physical and chemical properties, which has attracted people's attention, and has broad application prospects in the fields of chemical industry, textile, printing and dyeing, papermaking and medicine. [0004] Publication No. CN 101297654 is an invention ...

Claims

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Application Information

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IPC IPC(8): A01N59/20A01N43/16A01P1/00A61K33/38A61K31/722A61P31/04
CPCY02A50/30
Inventor 张利魏丽乔康虹马森源许并社
Owner TAIYUAN UNIV OF TECH
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