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Preparation method for anti-bacterial anti-radiation PLA (Poly Lactic Acid) material

A polylactic acid material and radiation protection technology, applied in the field of composite materials, can solve the problems of inability to distribute uniformly, difficult to meet multi-function, and product performance decline, and achieve the purpose of adding emotional and artistic effects, expanding the scope of application, and improving stability. Effect

Inactive Publication Date: 2017-02-01
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

[0003] The antibacterial agent in polylactic acid antibacterial products is not added in the form of antibacterial masterbatch. The production process of antibacterial masterbatch is to mix the antibacterial agent and matrix resin first, process it into a thread through a twin-screw extruder, and then pass it through a dryer at high temperature. Drying, granulation to obtain antibacterial masterbatch, using this method to process polylactic acid antibacterial masterbatch, drying at high temperature in the dryer will lead to thermal degradation of polylactic acid again, resulting in product performance degradation
And because the nano-silver antibacterial agent is granular and the particle size is nano-level, it can only be gathered in a specific part of the polylactic acid material and cannot be evenly distributed on the surface, thereby affecting the antibacterial effect; on the other hand, nano-silver and polylactic acid materials cannot Tightly combined (especially when the content of nano-silver particles increases, agglomeration is prone to occur), and it is easy to fall off during use, thus affecting the service life and antibacterial effect
The existing polylactic acid material has a single function, and it is difficult to meet the multi-functional characteristics

Method used

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  • Preparation method for anti-bacterial anti-radiation PLA (Poly Lactic Acid) material
  • Preparation method for anti-bacterial anti-radiation PLA (Poly Lactic Acid) material
  • Preparation method for anti-bacterial anti-radiation PLA (Poly Lactic Acid) material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of preparation method of antibacterial composite material, it comprises the following steps:

[0029] (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 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 8 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 30 minutes, and the laser irradia...

Embodiment 2

[0038] A kind of preparation method of antibacterial composite material, it comprises the following steps:

[0039] (1) Preparation of graphene quantum dot suspension: Weigh 0.7g 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, place the beaker in an ice-water bath, and simultaneously Stir at a speed of 500rpm to obtain a mixed solution; weigh 2g 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 45 minutes, and the laser irradia...

Embodiment 3

[0048] A kind of preparation method of antibacterial composite material, it comprises the following steps:

[0049] (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 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 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 60 minutes, and the laser irradiat...

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Abstract

The invention discloses a preparation method for an anti-bacterial anti-radiation PLA (Poly Lactic Acid) material. The preparation method comprises the following steps: (1) mixing and dispersing an anti-bacterial compound and nano-bamboo charcoal according to the weight ratio of (1-3):(2-5) in lactic acid, preparing a solution with the concentration of 1 to 2 g / L, and performing ultrasonic stirring for 60 to 90 minutes to obtain an anti-bacterial / anti-radiation lactic acid solution; (2) dispersing a photochromic compound in the lactic acid, preparing the solution with the concentration of 0.5 to 2 g / L, and performing ultrasonic compound for 60 to 90 minutes to obtain a photochromic lactic acid solution; (3) mixing the anti-bacterial / anti-radiation lactic acid solution and the photochromic lactic acid solution, and performing vacuum drying on the mixed solution in a vacuum drying box at 50 to 80 DEG C until the mixed solution does not contain irreducible water, wherein the PLA material is obtained by a direct condensing method. According to the preparation method for the anti-bacterial anti-radiation PLA material, the PLA material has anti-bacterial property and also has a photochromic function and anti-radiation property through scientific compatibility; the application range of the poly lactic acid material is further enlarged.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a preparation method of an antibacterial and radiation-proof polylactic acid material. Background technique [0002] Polylactic acid (PLA) is a polymer compound polymerized with lactic acid as the main raw material. It belongs to a type of lactide polyester. It is made of starch raw materials proposed by renewable plant resources (such as corn). Starch The raw material is made into lactic acid through the fermentation process, and then converted into polylactic acid through chemical synthesis, and the production process is pollution-free. After use, polylactic acid products can be completely degraded by microorganisms in nature, and finally generate carbon dioxide and water without polluting the environment. Even if polylactic acid is incinerated, its combustion calorific value is the same as that of incinerated paper, which is half that of incinerated traditional pla...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08K13/06C08K3/04C08K9/12C08K3/08C08K3/22C08K3/36C08K7/26C08G63/08C09K9/00
CPCC08K13/06C08G63/08C08K3/04C08K3/08C08K3/22C08K3/36C08K7/26C08K9/12C08K2003/0806C08K2003/221C08K2003/2241C08K2003/2296C08K2201/011C08K2201/014C08L2201/08C09K9/00C08L67/04
Inventor 陆庚
Owner 佛山市高明区尚润盈科技有限公司
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