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Preparation method of polylactic acid antimicrobial master batch

A technology of antibacterial masterbatch and polylactic acid, which is applied in botany equipment and methods, chemicals for biological control, biocides, etc., can solve the problems of affecting service life and antibacterial effect, uneven distribution, and easy agglomeration , to achieve excellent antibacterial and deodorizing properties, excellent anti-formaldehyde properties, and long-term antibacterial activity

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

[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 polylactic acid antimicrobial master batch
  • Preparation method of polylactic acid antimicrobial master batch
  • Preparation method of polylactic acid antimicrobial master batch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of preparation method of antibacterial composite material, it comprises the following steps:

[0031] (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

[0040] A kind of preparation method of antibacterial composite material, it comprises the following steps:

[0041] (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

[0050] A kind of preparation method of antibacterial composite material, it comprises the following steps:

[0051] (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 polylactic acid antimicrobial formaldehyde-removing master batch. The method comprises the following steps: (1) pretreating a polylactic acid raw material; (2) dissolving half of the pretreated polylactic acid in an organic solvent, dropwisely adding an antimicrobial composite water dispersion under the action of ultrasonic agitation, carrying out ultrasonic agitation, and carrying out spray drying to obtain an antimicrobial master batch; (3) dissolving the other half of the pretheated polylactic acid in an organic solvent, dropwisely adding a diatomite / inorganic oxide water dispersion under the action of ultrasonic agitation, carrying out ultrasonic agitation, and carrying out spray drying to obtain a formaldehyde-removing master batch; and (4) uniformly mixing the two master batches to obtain a mixture, and granulating to obtain the polylactic acid antimicrobial formaldehyde-removing master batch. By reasonably matching the diatomite / inorganic oxide and antimicrobial composite material under the synergistic actions among the functional additives, the polylactic acid master batch has the excellent antimicrobial and deodorizing properties and anti-formaldehyde characteristics, and satisfies the demands of the multifunctional polylactic acid master batch, thereby further widening the applicability of the polylactic acid master batch.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a preparation method of polylactic acid antibacterial masterbatch. 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 polye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K13/06C08K9/12C08K9/00C08K9/10C08K3/04C08K3/08C08K3/34C08K3/36C08K3/22A01N59/16A01P1/00
CPCC08L67/04A01N59/16C08K2201/011C08K2201/014C08L2205/025C08K13/06C08K9/12C08K9/00C08K9/10C08K2003/2296C08K3/04C08K2003/0806C08K2003/2241C08K3/34C08K2003/2244C08K3/36C08K3/22C08K2003/2231C08K2003/2251C08K2003/2227C08K2003/2272C08K2003/222C08K2003/2262
Inventor 陆庚
Owner 佛山市高明区尚润盈科技有限公司
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