Graphene crystal composite polylactic acid antibacterial material and preparation method thereof

A technology of alkene polylactic acid and composite material, applied in the field of graphene crystal composite polylactic acid antibacterial material and preparation thereof, can solve the problems of uneven combination of antibacterial composite and polylactic acid, poor antibacterial effect, poor antibacterial performance, etc. Suitable for industrial production, enhanced antibacterial effect, durable antibacterial effect

Inactive Publication Date: 2017-10-27
江苏苏沃尚新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In view of the above-mentioned state of the art, the object of the present invention is to provide a polylactic acid composite material with antibacterial properties and a preparation method thereof, which solves the problems of poor antibacterial properties of polylactic acid materials and uneven combination of antibacterial composites and polylactic acid in the prior art. , poor antibacterial effect, unstable properties, etc.

Method used

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  • Graphene crystal composite polylactic acid antibacterial material and preparation method thereof

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Embodiment 1

[0049] The first step: preparation of graphene antibacterial composite

[0050] (1) Take 10g of titanium dioxide with a particle size of 50-80nm and 1g of zinc oxide with a particle size of 20-50nm, pour them into the agate ball mill cylinder of the ball mill, add 11ml of water, and perform ball milling at a speed of 600rpm for 4 hours, and then divide into three batches Add 10g of nano-silver powder with a particle size of 25nm, and then add 10ml of water, and continue ball milling for 3h. Stop ball milling, and dry at about 50°C under a vacuum of 0.2MPa to obtain an antibacterial mixture;

[0051] (2) Dissolve 210g of graphene in 42L of ethanol, ultrasonically oscillate at 100KW until dissolved, and prepare a graphene solution; add 5% sodium hydroxide solution, disperse with ultrasound, then add 2100g of chloroacetic acid, and continue the reaction for 3 hours. Centrifuge at a rate of 500rpm for 1h, and dry at 60°C for 5h under a vacuum of 0.2MPa to obtain surface-modified ...

Embodiment 2

[0057] The first step: preparation of graphene antibacterial composite

[0058] (1) Take 10g of titanium dioxide with a particle size of 10-30nm and 0.5g of zinc oxide with a particle size of 50-80nm, pour them into the agate ball milling cylinder of the ball mill, add 10ml of water, and perform ball milling at a speed of 800rpm for 3 hours, then divide into three Add 10g of nano-silver powder with a particle size of 50nm in batches, then add 10ml of water, and continue ball milling for 5h. Stop ball milling, and dry at about 50°C under a vacuum of 0.5MPa to obtain an antibacterial mixture;

[0059] (2) Dissolve 600g of graphene in 40L of ethanol, ultrasonically vibrate at 250KW until dissolved, and prepare a graphene solution; add 5% potassium hydroxide solution, disperse with ultrasound, then add 3000g of chloroacetic acid, and continue the reaction for 5 hours. Centrifuge at 800rpm speed for 1h, and dry at 60°C for 5h at a vacuum of 0.3MPa to obtain surface-modified graphe...

Embodiment 3

[0065] The first step: preparation of graphene antibacterial composite

[0066] (1) Take 10g of titanium dioxide with a particle size of 30~50nm and 0.8g of zinc oxide with a particle size of 10~30nm, pour them into the agate ball mill cylinder of the ball mill, add 11ml of water, and perform ball milling at a speed of 700rpm for 5h, then divide into three Add 10g of nano-silver powder with a particle size of 10nm in batches, then add 10ml of water, and continue ball milling for 5h. Stop ball milling, and dry at about 50°C under a vacuum of 0.3MPa to obtain an antibacterial mixture;

[0067] (2) Dissolve 400g of graphene in 40L of ethanol, add 80g of non-ionic surfactant sorbitol ester, and ultrasonically vibrate at a frequency of 200KW until dissolved to prepare a graphene solution; add 10% sodium hydroxide solution and disperse it with ultrasound. Then add 3000g of chloroacetic acid, continue to react for 5 hours, centrifuge at 800rpm for 1h, and dry at 60°C for 5h at a vac...

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Abstract

The invention belongs to the field of high molecular materials, and particularly relates to a modified graphene polylactic acid antibacterial composite material and a preparation method of the composite material. An antibacterial mixture used in the composite material comprises nano silver and nano titanium oxide, and nano zinc oxide capable of improving the optical activity of nano titanium oxide is added, so that an antibacterial property is greatly improved, a nature is more stable, and antibacterial action is more persistent. The composite material fully exerts antibacterial properties of nano silver and nano titanium oxide and a mechanical characteristic of a graphene material, so that a mechanical property of the material is improved under the condition that an antibacterial effect is maximized; and the preparation method is mild in technological condition, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a graphene crystal composite polylactic acid antibacterial material and a preparation method thereof. Background technique [0002] Since Graphene was reported by Andre Geim, a professor at the University of Manchester in 2004, it has attracted widespread attention and great interest from scientists due to its unique properties, and it is predicted that it is likely to be used in revolutionized many fields. [0003] Graphene is a two-dimensional honeycomb crystal composed of carbon atoms in hexagonal cells, with a thickness of only 0.334nm. It is the basic unit for constructing other dimensional carbonaceous materials. Due to its unique two-dimensional structure and excellent crystallographic quality, graphene has many excellent unique properties, such as high electron mobility, high transparency, high thermal conductivity, etc., making it widely used in transparent ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K13/06C08K9/04C08K3/04C08K3/22
CPCC08K13/06C08K3/04C08K3/22C08K9/04C08K2003/2241C08K2003/2296C08K2201/003C08K2201/011C08L67/04
Inventor 章友芳
Owner 江苏苏沃尚新材料科技有限公司
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