Method for preparing antibacterial formaldehyde removal master batch with polylactic acid

A polylactic acid and formaldehyde technology, applied in the field of composite materials, can solve the problems of affecting service life and antibacterial effect, single function of formaldehyde removal masterbatch, difficult to meet multi-function, etc., to achieve excellent antibacterial and deodorizing performance, excellent anti-formaldehyde characteristics , good antibacterial effect

Inactive Publication Date: 2016-11-09
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
Moreover, 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 antibacterial and formaldehyde-removing masterbatch, and cannot be evenly distributed on the surface, thereby affecting the antibacterial effect; on the other hand, nano-silver and Polylactic acid antibacterial and formaldehyde-removing masterbatch cannot be tightly combined (especially when the content of nano-silver particles increases, it is prone to agglomeration), and it is easy to fall off during use, thus affecting the service life and antibacterial effect
The existing polylactic acid antibacterial and formaldehyde-removing masterbatch has a single function, and it is difficult to meet the multi-functional characteristics

Method used

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  • Method for preparing antibacterial formaldehyde removal master batch with polylactic acid
  • Method for preparing antibacterial formaldehyde removal master batch with polylactic acid
  • Method for preparing antibacterial formaldehyde removal master batch with polylactic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A kind of preparation method of porous graphene loaded silver / titanium dioxide antibacterial composite material, it comprises the following steps:

[0029](1) Preparation of graphene quantum dot suspension: weigh 0.5g 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 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 pe...

Embodiment 2

[0036] A kind of preparation method of porous graphene loaded silver / titanium dioxide antibacterial composite material, it comprises the following steps:

[0037] (1) Preparation of graphene quantum dot suspension: weigh 0.6g of C60 powder, measure 50-100ml 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, At the same time, 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 7 hours; quickly add 200ml of pure water, filtered, and then dialyzed with a dialysis bag with a molecular weight cut-off of 1000 for 3 days to obtain a suspension of graphene quantum dots; stir the suspension of graphene quantum dots at a speed of 100rpm, and irradiate the laser for 45min a...

Embodiment 3

[0044] A kind of preparation method of porous graphene loaded silver / titanium dioxide antibacterial composite material, it comprises the following steps:

[0045] (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 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 100ml 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 p...

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PUM

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Abstract

The invention discloses a method for preparing antibacterial formaldehyde removal master batch with polylactic acid. The method includes steps of (1), pre-treating polylactic acid materials; (2), dissolving one half of pre-treated polylactic acid in organic solvents, adding antibacterial composite aqueous dispersion liquid into the organic solvents drop by drop under ultrasonic stirring conditions, ultrasonically stirring the organic solvents and carrying out spray drying to obtain antibacterial master batch; (3), dissolving the other half of the pre-treated polylactic acid in organic solvents, adding diatomaceous earth / inorganic oxide aqueous dispersion liquid into the organic solvents drop by drop under ultrasonic stirring conditions, ultrasonically stirring the organic solvents and carrying out spray drying to obtain formaldehyde removal master batch; (4), mixing the antibacterial master batch and the formaldehyde removal master batch with each other, uniformly stirring the antibacterial master batch and the formaldehyde removal master batch to obtain mixtures and granulating the mixtures to obtain the antibacterial formaldehyde removal master batch with the polylactic acid. The method has the advantages that diatomaceous earth / inorganic oxide and antibacterial composite materials are reasonably matched with one another, synergistic effects among functional additives are realized, accordingly, the antibacterial formaldehyde removal master batch with the polylactic acid is excellent in antibacterial and deodorization performance and anti-formaldehyde characteristic, requirements on multifunctional master batch with polylactic acid can be met, and application of the antibacterial formaldehyde removal master batch with the polylactic acid further can be expanded.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a preparation method of polylactic acid antibacterial formaldehyde-removing 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 p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08K13/06C08K9/12C08K3/04C08K3/22C08K3/34C08K3/08C08J3/22
CPCC08L67/04C08J3/226C08J2467/04C08K2201/011C08L2205/025C08K13/06C08K9/12C08K3/04C08K2003/2241C08K3/34C08K2003/0806
Inventor 陆庚
Owner 佛山市高明区尚润盈科技有限公司
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