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Preparation method and application of micro-nano silver/chitosan composite antibacterial agent

A compound antibacterial agent, micro-nano silver technology, applied in the field of micro-nano materials, can solve the problems of discoloration, active chemical properties, easy aging, etc., and achieve the effect of stable properties, stable physical and chemical properties, and large specific surface area

Inactive Publication Date: 2018-11-20
湖州大本营科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although silver ions have good safety and high antibacterial efficiency, they still have disadvantages such as active chemical properties that lead to easy aging and discoloration.

Method used

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  • Preparation method and application of micro-nano silver/chitosan composite antibacterial agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of a micro-nano silver / chitosan composite antibacterial agent, the preparation method comprising the steps of:

[0028] (1) Weigh a certain amount of AgNO 3 , PVP mixed, where AgNO 3 The mass ratio to PVP is 1:3, and deionized water is added to it, and preheated in a water bath at 40°C for 10 minutes. After the sample is completely dissolved, place it in a microwave oven. The microwave power is 20%, and the full power is 650W , heating and reacting for 5min, the prepared micronano silver colloid; the AgNO 3 The mass ratio with deionized water is 1:5.

[0029] (2) Weigh a certain amount of chitosan and dissolve it in lactic acid aqueous solution with a mass concentration of 1wt%, to prepare a chitosan solution with a mass concentration of 1wt%, and then weigh a certain amount of micronano prepared in step (1). Silver was dispersed into the chitosan solution with a mass concentration of 1 wt%, and then dodecylbenzenesulfonic acid was added dropwise...

Embodiment 2

[0036] A preparation method of a micro-nano silver / chitosan composite antibacterial agent, the preparation method comprising the steps of:

[0037] (1) Weigh a certain amount of AgNO 3 , PVP mixed, and deionized water was added to it, preheated in a water bath at a certain temperature for 10 minutes, and placed in a microwave oven after the sample was completely dissolved. Micro-nano silver glue; the AgNO 3 The mass ratio to PVP is 1:6. The AgNO 3 The mass ratio to deionized water is 1:20. The preheating temperature of the middle water bath is preferably 40°C.

[0038] (2) Weigh a certain amount of chitosan and dissolve it in lactic acid aqueous solution with a mass concentration of 1wt%, to prepare a chitosan solution with a mass concentration of 1wt%, and then weigh a certain amount of micronano prepared in step (1). Silver was dispersed into the chitosan solution with a mass concentration of 1 wt%, and then dodecylbenzenesulfonic acid was added dropwise to help it disp...

Embodiment 3

[0045] A preparation method of a micro-nano silver / chitosan composite antibacterial agent, the preparation method comprising the steps of:

[0046] (1) Weigh a certain amount of AgNO 3 , PVP mixed, and deionized water was added to it, preheated in a water bath at a certain temperature for several minutes, and placed in a microwave oven after the sample was completely dissolved. Micro-nano silver glue; the AgNO 3 The mass ratio to PVP is 1:6. The AgNO 3 The mass ratio to deionized water is 1:20. The preheating temperature of the middle water bath is preferably 40°C.

[0047] (2) Weigh a certain amount of chitosan and dissolve it in lactic acid aqueous solution with a mass concentration of 1wt%, to prepare a chitosan solution with a mass concentration of 1wt%, and then weigh a certain amount of micronano prepared in step (1). Silver was dispersed into the chitosan solution with a mass concentration of 1 wt%, and then dodecylbenzenesulfonic acid was added dropwise to help it...

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Abstract

The invention discloses a preparation method of a micro-nano silver / chitosan composite antibacterial agent. According to the preparation method, on the basis of the characteristic of rapid microwave heating, silver nitrate is taken as a silver source, water is taken as a solvent, and spherical micro-nano silver particles are successfully prepared in a shorter time with direct utilization of reducibility of PVP (polyvinylpyrrolidone) in preparation under the condition of only PVP addition without other reducing agents; the spherical micro-nano silver particles are loaded to chitosan polymers bycoordination, the micro-nano silver / chitosan composite antibacterial agent is prepared and added to antibacterial body care products, and antibacterial performance is adjusted by changing adding quantity and strain categories of the composite antibacterial agent. The preparation technology is not reported, compared with a conventional chemical reduction method, the method has advantages that a synthetic reaction is performed rapidly, other reducing agents are not needed, the preparation technology is simplified, raw materials are saved, and water serving as the solvent is cleaner, so that onerapid, simple, efficient and environment-friendly method is provided for preparation of micro-nano silver.

Description

technical field [0001] The invention relates to a micro-nano material, in particular to a preparation method and application of a micro-nano silver / chitosan composite antibacterial agent. Background technique [0002] The research and screening of antibacterial disinfectants has always been a research hotspot for scholars at home and abroad. Although traditional antibacterial agents such as aldehydes, acids, and chlorine have strong bactericidal ability, they are highly corrosive and toxic, which restricts their wide application. Silver ions have the characteristics of broad-spectrum antibacterial, long-lasting function, safety and sanitation, and are not easy to produce drug resistance, which has become an important direction of antibacterial research. At present, silver ions are mainly used in drinking water disinfection and inorganic antibacterial materials. In countries such as Japan, Europe and the United States, silver ion antibacterial disinfection technology has ...

Claims

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Application Information

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IPC IPC(8): A01N59/16A01N43/16A01P1/00C11D3/48C11D3/37C11D3/00
CPCA01N43/16A01N59/16C11D3/00C11D3/227C11D3/48
Inventor 胡斌斌
Owner 湖州大本营科技有限公司
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