Porous graphene silver-loaded antibacterial composite material and preparation method thereof

A technology of porous graphene and composite materials, applied in the fields of botanical equipment and methods, fungicides, chemicals for biological control, etc. Cost, long-lasting antibacterial activity, and safety-enhancing effect

Inactive Publication Date: 2016-12-07
佛山市高明区尚润盈科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Subsequently, a series of graphene / silver nanocomposite antibacterial materials with good antibacterial properties appeared. Studies have found that the use of such materials has certain limitations; On the specific part of graphene, it cannot be evenly distributed on the surface, thus affecting the antibacterial effect; on the other hand, nano-silver and graphene cannot be tightly combined (especially when the content of nano-silver particles increases, it is easy to agglomerate), when using It is easy to fall off during the process, which will affect the service life and antibacterial effect

Method used

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  • Porous graphene silver-loaded antibacterial composite material and preparation method thereof
  • Porous graphene silver-loaded antibacterial composite material and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0017] A kind of preparation method of porous graphene silver-loaded antibacterial composite material, it comprises the following steps:

[0018] (1) Preparation of graphene quantum dot suspension: weigh 0.5g of C60 powder, measure 50ml of concentrated sulfuric acid with a mass fraction of 98%, mix C60 powder and concentrated sulfuric acid in a beaker, place the beaker in an ice-water bath, and simultaneously Stir at a speed of 500rpm to obtain a mixed solution; weigh 0.5g of potassium permanganate powder, and slowly add it to the above mixed solution; remove the ice-water bath and replace it with a water bath, keep the temperature of the water bath at 30~40°C, and react for 8 hours; quickly add 200ml Pure water, filtered, and then dialyzed for 3 days with a dialysis bag with a molecular weight cut-off of 1000, to obtain a suspension of graphene quantum dots; the suspension of graphene quantum dots was stirred at a speed of 100 rpm, while laser irradiation was performed for 30 ...

Embodiment 2

[0024] A kind of preparation method of porous graphene silver-loaded antibacterial composite material, it comprises the following steps:

[0025] (1) Preparation of graphene quantum dot suspension: Weigh 0.6g of C60 powder, measure 80ml of concentrated sulfuric acid with a mass fraction of 98%, mix C60 powder and concentrated sulfuric acid in a beaker, put the beaker in an ice-water bath, and simultaneously Stir at a speed of 500rpm to obtain a mixed solution; weigh 1g of potassium permanganate powder, and slowly add it to the above mixed solution; remove the ice-water bath and replace it with a water bath, keep the temperature of the water bath at 30~40°C, and react for 6 hours; quickly add 200ml of pure Water, filtered, and then dialyzed for 3 days with a dialysis bag with a molecular weight cut-off of 1000 to obtain a suspension of graphene quantum dots; the suspension of graphene quantum dots was stirred at a speed of 100 rpm, while laser irradiation was performed for 40 mi...

Embodiment 3

[0031] A kind of preparation method of porous graphene silver-loaded antibacterial composite material, it comprises the following steps:

[0032] (1) Preparation of graphene quantum dot suspension: Weigh 0.8g of C60 powder, measure 100ml of concentrated sulfuric acid with a mass fraction of 98%, mix C60 powder and concentrated sulfuric acid in a beaker, put the beaker in an ice-water bath, and simultaneously Stir at a speed of 500rpm to obtain a mixed solution; weigh 3g of potassium permanganate powder, and slowly add it to the above mixed solution; remove the ice-water bath and replace it with a water bath, keep the temperature of the water bath at 30-40°C, and react for 5 hours; quickly add 100ml of pure Water, filtered, and then dialyzed for 3 days with a dialysis bag with a molecular weight cut-off of 1000 to obtain a suspension of graphene quantum dots; the suspension of graphene quantum dots was stirred at a speed of 100 rpm, while laser irradiation was performed for 30 m...

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Abstract

The invention discloses a porous graphene silver-loaded antibacterial composite material and a preparation method thereof. The preparation method comprises the following steps: (1) preparing graphene quantum dot suspension liquid; (2) preparing silver-loaded graphene quantum dots; (3) preparing SiO2 coated silver-loaded graphene quantum dots; (4) carrying out surface treatment on the SiO2 coated silver-loaded graphene quantum dots; and (5) preparing the antibacterial composite material. The method disclosed by the invention takes laser irradiated graphene quantum dots as carriers of silver, and the silver is coated with silicon dioxide thin layers; finally, the silver is attached to porous graphene, so that silver nanoparticles can be loaded and fixed very well and are prevented from being agglomerated; the stability of the silver nanoparticles is remarkably improved so that the silver nanoparticles have relatively long-acting antibacterial activity; and meanwhile, the safety is improved, the utilization cost is reduced and the porous graphene silver-loaded antibacterial composite material has a wide application prospect in industrial application.

Description

technical field [0001] The invention relates to a porous graphene silver-loaded antibacterial composite material and a preparation method thereof. Background technique [0002] The development and application of antibacterial materials has set up a green barrier for the protection of human health, which is of great significance for improving the living environment of human beings, reducing diseases and protecting the health of the whole people. Humans have long recognized that certain metals such as silver, copper, zinc, mercury, bismuth, and cadmium have antibacterial effects and are safe for humans and animals. Compared with organic antibacterial agents, metal antibacterial agents have the characteristics of high temperature resistance, broad-spectrum antibacterial, long-lasting, safe, and no secondary pollution, and are gradually becoming a new research hotspot in the field of antibacterial. [0003] Graphene, as an allotrope of carbon, is a single-layer two-dimensional ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N59/16A01N59/00A01P3/00
CPCA01N59/16A01N59/00A01N2300/00
Inventor 陆庚
Owner 佛山市高明区尚润盈科技有限公司
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