Preparing method of antibacterial polylactic acid material

A technology of polylactic acid materials and lactic acid, which is applied in the field of preparation of antibacterial polylactic acid materials, can solve the problems that nano silver and polylactic acid materials cannot be tightly combined, product performance declines, and is easy to fall off.

Inactive Publication Date: 2017-01-11
佛山市高明区尚润盈科技有限公司
View PDF8 Cites 10 Cited by
  • 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, result

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparing method of antibacterial polylactic acid material
  • Preparing method of antibacterial polylactic acid material
  • Preparing method of antibacterial polylactic acid material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0037] (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 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 200ml 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 ...

Embodiment 2

[0043] A kind of preparation method of porous graphene silver-loaded antibacterial composite material, it comprises the following steps:

[0044] (1) Preparation of graphene quantum dot suspension: Weigh 0.6g 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, 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 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 40 mi...

Embodiment 3

[0050] A kind of preparation method of porous graphene silver-loaded 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 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 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 30 m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a preparing method of an antibacterial polylactic acid material. The method comprises the steps of 1, dispersing antibacterial compound into lactic acid, preparing solution with a concentration of 0.1-2g/L, conducting ultrasonic agitation (500-800W ultrasonic power at a rate of agitation of 500-800rpm) for 60-90min to obtain antibacterial lactic acid solution; 2, placing the antibacterial lactic solution into a vacuum oven at a temperature of 50-80 DEG C to vacuum dry for 24-36h until no redundant water is in the mixed liquor; obtaining the antibacterial polylactic acid material through direct condensing method. According to the antibacterial compound method, grapheme quantum dots after laser irradiation are adopted as the carrier of silver, then covered with silicon dioxide lamella for surface treatment, and finally adhered on porous grapheme, which can better load and fix silver nano particles, prevent the silver nano particles from agglomeration and remarkably improve the stability of the silver nano particles and enable longer antibacterial activity of the silver nano particles; application of the antibacterial compound on polylactic acid fiber film enables lasting and effective antibacterial activity and properties of high stability, broad-spectrum antibacterial and biodegradation.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a preparation method of an antibacterial 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 polyethylene). ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C08G63/08C08K13/06C08K9/12C08K9/10C08K9/02C08K3/04C08K3/08C08K3/22C08K7/24C08K3/36
CPCC08G63/08C08K3/04C08K3/08C08K3/22C08K3/36C08K7/24C08K9/02C08K9/10C08K9/12C08K13/06C08K2003/0806C08K2003/2241C08K2003/2296C08K2201/003C08K2201/011C08K2201/014
Inventor 陆庚
Owner 佛山市高明区尚润盈科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap