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Chitosan packed nano-silver and graphene oxide composite antibacterial material

A technology of graphene composite and antibacterial materials, which is applied in the fields of chemicals for biological control, animal repellents, botanical equipment and methods, etc., and can solve problems such as the inability to explain the synergistic antibacterial effect of graphene oxide and nano-silver

Inactive Publication Date: 2017-01-25
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] For example, the publication number is CN104068058A disclosed "a preparation method of graphene oxide antibacterial composite material", using glucose as reducing agent and starch as stabilizer to prepare graphene oxide antibacterial composite material by one-step reduction method, the process is simple, Convenient operation, mild reaction conditions, high production efficiency, green and environment-friendly; in the prepared graphene oxide antibacterial composite material, nano-silver particles are evenly adsorbed on graphene oxide, which effectively improves the antibacterial performance of graphene oxide , but the invention cannot explain whether there is a synergistic antibacterial effect between graphene oxide and nano-silver

Method used

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  • Chitosan packed nano-silver and graphene oxide composite antibacterial material
  • Chitosan packed nano-silver and graphene oxide composite antibacterial material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Implement a technical scheme of O-carboxymethyl chitosan wrapped nano-silver graphene oxide composite antibacterial material, said O-carboxymethyl chitosan wrapped nano-silver graphene oxide composite antibacterial material is composed of graphene oxide and O - Carboxymethyl chitosan coated nano silver self-assembled in aqueous solution. The preparation method of the O-carboxymethyl chitosan-coated silver nanometer is the same as that of Comparative Experiment 1. Then O-carboxymethyl chitosan-wrapped nano-silver and graphene oxide were dissolved in ultrapure water at a mass ratio of 5:1, and ultrasonically treated for 10 minutes to obtain O-carboxymethyl-chitosan-wrapped nano-silver graphene oxide composite antibacterial material.

[0026] Compared with Comparative Example 1, the addition of graphene oxide in Example 1 can effectively prevent nano-silver from agglomerating, and the dispersibility is better.

[0027] Microbroth dilution method minimum inhibitory concen...

Embodiment 2

[0030] Prepared according to the process method of Example 1, the difference of Example 2 is: O-carboxymethyl chitosan wraps nano silver and graphene oxide in a mass ratio of 3:3.

[0031] Compared with Example 1, the proportion of graphene oxide in Example 3 is increased, and the dispersibility is better.

[0032] Microbroth dilution method minimum inhibitory concentration test is the same as Comparative Example 1.

[0033] The test results are attached figure 1 , attached figure 2 , the present embodiment O-carboxymethyl chitosan wrapped nano-silver graphene oxide composite antibacterial material has a minimum inhibitory concentration of 4 µ / mL to Escherichia coli, and a minimum inhibitory concentration of 4 µ / mL to Staphylococcus aureus, The antibacterial effect is not as good as that of Example 1 and Comparative Example 1, so the proportion of graphene oxide should not be too large.

Embodiment 3

[0035] Prepared according to the process method of Example 1, the difference of Example 2 is that: O-carboxymethyl chitosan wraps nano silver and graphene oxide in a mass ratio of 2:4.

[0036] The dispersibility of the O-carboxymethyl chitosan-wrapped nano-silver graphene oxide composite antibacterial material in this example is between Example 1 and Example 2.

[0037] Microbroth dilution method minimum inhibitory concentration test is the same as Comparative Example 1.

[0038] The test results are attached figure 1 , attached figure 2 , the O-carboxymethyl chitosan-wrapped nano-silver graphene oxide composite antibacterial material has a minimum inhibitory concentration of 0.25 µ / mL for Escherichia coli and a minimum inhibitory concentration of 1 µ / mL for Staphylococcus aureus. Better than Example 1 and Comparative Example 1, it shows that there is a significant synergistic antibacterial effect when the O-carboxymethyl chitosan-wrapped nano-silver and graphene oxide are...

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Abstract

A chitosan packed nano-silver and graphene oxide composite antibacterial material is formed by mixing O-carboxymethyl chitosan packed nano-silvers with graphene oxide, wherein each O-carboxymethyl chitosan packed nano-silver consists of a nano-silver core and an O-carboxymethyl chitosan shell adsorbed on the surface of the nano-silver core; and the O-carboxymethyl chitosan packed nano-silvers are uniformly loaded on the surface of the graphene oxide. The antibacterial effect is optimized by changing the ratio of the various O-carboxymethyl chitosan packed nano-silvers to the graphene oxide, the minimal inhibitory concentration to colibacillus is 0.25 mu / mL, the minimal inhibitory concentration to staphylococcus aureus is 1 mu / mL, and the minimal inhibitory concentrations reach the minimum concentration limit of existing domestic and overseas like optimal products, used materials are harmless to human bodies, and the chitosan packed nano-silver and graphene oxide composite antibacterial material is low in price and is an environmentally friendly novel composite antibacterial agent.

Description

technical field [0001] The invention relates to a graphene oxide-nano-silver composite antibacterial agent, in particular to an O-carboxymethyl chitosan-wrapped nano-silver graphene oxide composite antibacterial material used for antibacterial modification and blending of materials. Background technique [0002] People are often inadvertently exposed to various bacteria and viruses in daily life. These microorganisms can multiply rapidly in a suitable growth environment such as humidity and temperature, and spread diseases through contact, affecting people's physical and mental health. Therefore, it is of great significance to study convenient and practical, long-acting and low-toxic antibacterial agents that are easy to realize antibacterial and bactericidal functions, and create a healthy and hygienic living and working environment. [0003] Nano-silver is one of the most promising nanomaterials, which has significantly better bactericidal properties than silver ion compou...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N59/00A01N25/08A01N25/22A01P1/00
CPCA01N25/08A01N25/22A01N59/00A01N59/16A01N2300/00
Inventor 张杰王慧芳高向华管路遥魏丽乔
Owner TAIYUAN UNIV OF TECH