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Preparation method of photochromic polylactic acid material

A polylactic acid material and photochromic technology, applied in the field of composite materials, can solve the problems of uneven distribution, difficult to meet multi-function, and affect antibacterial effect, etc., to achieve emotional and artistic effects, broaden the application range, and good antibacterial effect Effect

Inactive Publication Date: 2017-01-04
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 of photochromic polylactic acid material
  • Preparation method of photochromic polylactic acid material
  • Preparation method of photochromic polylactic acid material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of preparation method of antibacterial composite material, it comprises the following steps:

[0028] (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

[0037] A kind of preparation method of antibacterial composite material, it comprises the following steps:

[0038] (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

[0047] A kind of preparation method of antibacterial composite material, it comprises the following steps:

[0048] (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 of a photochromic polylactic acid material. The method includes the following steps of firstly, dispersing an antibacterial compound in lactic acid to prepare a solution with concentration of 0.1-2 g / L, and conducting ultrasonic stirring for 60-90 min to obtain an antibacterial lactic acid solution; secondly, dispersing a photochromic compound in lactic acid to prepare a solution with concentration of 0.5-2 g / L, and conducting ultrasonic stirring for 60-90 min to obtain a photochromic lactic acid solution; thirdly, mixing the antibacterial lactic acid solution and the photochromic lactic acid solution to be standing still in a vacuum oven at 50-80 DEG C, conducting vacuum drying for 24-36 h till the mixed liquid is free of residual water, and obtaining a polylactic acid material through a direct condensation method. By scientifically matching the antibacterial compound and the photochromic compound, the polylactic acid material has the antibacterial characteristic and also has a photochromic function, and the application range of the polylactic acid material is further widened.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a preparation method of a photochromic 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 plastics (such as polyeth...

Claims

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Application Information

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IPC IPC(8): C08G63/08C08K13/06C08K9/12C08K9/00C08K9/10C08K9/02C08K7/26C08K3/22C08K3/04C08K3/08
CPCC08G63/08C08K3/04C08K3/08C08K3/22C08K7/26C08K9/00C08K9/02C08K9/10C08K9/12C08K13/06C08K2003/0806C08K2003/221C08K2003/2241C08K2003/2296C08K2201/003C08K2201/011C08K2201/014
Inventor 陆庚
Owner 佛山市高明区尚润盈科技有限公司
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