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Preparation method for graphene/nano-silver composite antibacterial material

A composite antibacterial and graphene technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as toxicity, environmental and human health risks, and achieve mild reaction conditions and simple preparation methods. Effect

Active Publication Date: 2016-07-20
湖州因爱伟大卫生用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These reducing agents are highly toxic, which poses a great risk to the environment and human health

Method used

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  • Preparation method for graphene/nano-silver composite antibacterial material
  • Preparation method for graphene/nano-silver composite antibacterial material
  • Preparation method for graphene/nano-silver composite antibacterial material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) 2gNaNO 3 Add to a 500mL four-necked flask, add 100mL of 98% concentrated sulfuric acid, and cool in an ice bath. When the temperature of the reaction system is lower than 5°C, add 5g of dry graphite powder under stirring. After mixing evenly, slowly add 10g of graphite powder under vigorous stirring. Potassium permanganate, during the feeding process, control the temperature of the reaction mixture to not exceed 20°C. After the addition, raise the temperature of the reaction liquid to 35°C, and react for 100 minutes. After the reaction, raise the temperature of the reaction solution to 98°C, slowly add 200mL of distilled water dropwise under vigorous stirring, after the addition, control the temperature of the reaction solution at about 98°C, continue to stir for 10min, then add 600mL of deionized water to terminate the reaction ; At the same time, add 30mL30% hydrogen peroxide to remove unreacted potassium permanganate, at this moment the solution turns from browni...

Embodiment 2

[0026] (1) 4gNaNO 3 Add to a 500mL four-neck flask, add 150mL of 98% concentrated sulfuric acid, and cool in an ice bath. When the temperature of the reaction system is lower than 5°C, add 5g of dry graphite powder under stirring. After mixing evenly, slowly add 20g of graphite powder under vigorous stirring. Potassium permanganate, during the feeding process, control the temperature of the reaction mixture to not exceed 20°C. After the addition, raise the temperature of the reaction liquid to 32°C, and react for 180 minutes. After the reaction, raise the temperature of the reaction solution to 98°C, and slowly add 250mL of distilled water dropwise under vigorous stirring. After the addition, control the temperature of the reaction solution at about 98°C, continue to stir for 20min, and then add 800mL of deionized water to terminate the reaction ; At the same time, add 50mL30% hydrogen peroxide to remove unreacted potassium permanganate, at this time the solution turns from br...

Embodiment 3

[0031] (1) 3gNaNO 3Add to a 500mL four-necked flask, add 120mL of 98% concentrated sulfuric acid, and cool in an ice bath. When the temperature of the reaction system is lower than 5°C, add 5g of dry graphite powder under stirring. After mixing evenly, slowly add 15g of graphite powder under vigorous stirring. Potassium permanganate, during the feeding process, control the temperature of the reaction mixture to not exceed 20°C. After the addition, raise the temperature of the reaction liquid to 38°C, and react for 120 minutes. After the reaction, raise the temperature of the reaction solution to 98°C, and slowly add 220mL of distilled water dropwise under vigorous stirring. After the addition, control the temperature of the reaction solution at about 98°C, continue stirring for 15min, and then add 700mL of deionized water to terminate the reaction ; At the same time, add 40mL30% hydrogen peroxide to remove unreacted potassium permanganate, at this time the solution turns from ...

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Abstract

The invention provides a preparation method for a graphene / nano-silver composite antibacterial material and belongs to the technical field of new materials. The preparation method is characterized in that graphene oxide provided with silver ions in an adsorption manner is put into a reduction agent solution to be heated, the graphene / nano-silver composite material is obtained through centrifugal separation, and a reduction agent is glyoxylic acid. The method has the beneficial effects that reduction of the graphene oxide and the silver ions is sufficient, operation is simple, the process is controllable, and the obtained material has good antibacterial activity on common bacteria.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a preparation method of a graphene / nano-silver composite antibacterial material. Background technique [0002] Health is the most concerned topic in today's society. However, there are a large number of bacteria in the environment we live in. The growth and reproduction of these bacteria seriously threaten human health. Selecting suitable antibacterial agents to inhibit the growth and reproduction of harmful bacteria can effectively protect people's health. [0003] Antibacterial agents can be divided into organic antibacterial agents, natural antibacterial agents, and inorganic antibacterial agents according to their structures. These three kinds of antibacterial agents each have their own characteristics. Organic antibacterial agents have good bactericidal effect and low price, but have poor safety and serious environmental pollution. Natural antibacterial agents come...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/07
Inventor 彭勇刚纪俊玲汪媛陶永新
Owner 湖州因爱伟大卫生用品有限公司
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