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Biodegradable material with antibacterial effect and high strength, and preparation and application thereof

A biodegradable material and high-strength technology, applied in the field of biodegradable materials, can solve the problems of low application degree and poor performance of polylactic acid, and achieve the effect of reducing application, improving antibacterial property, and expanding application range

Active Publication Date: 2020-02-25
湖南绿斯达生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a biodegradable material with antibacterial effect and high strength for the disadvantages of poor performance and low application degree of polylactic acid

Method used

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  • Biodegradable material with antibacterial effect and high strength, and preparation and application thereof
  • Biodegradable material with antibacterial effect and high strength, and preparation and application thereof
  • Biodegradable material with antibacterial effect and high strength, and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a method for preparing a biodegradable material with antibacterial effect and high strength, the steps include:

[0035] S1. Dissolve the dried bio-resin in a solvent, fill it with protective gas, add antibacterial agent, grafting aid and catalyst, stir and react at 45-60°C for 3-4h, then dry at 45-60°C for 12-24h to obtain Antibacterial agent-g-biological resin graft copolymer;

[0036] S3. Pass the polylactic acid, antibacterial agent-g-biological resin graft copolymer and compatibilizer through the extruder, and the extrusion temperature (from the feeding section to the die head) of the extruder is set to 170, 175, 190, 190, 190, 170°C respectively, and the screw The rotation speed is 40-60r / min, the length-to-diameter ratio of the screw is 15-25:1, the melt polymerization reaction is carried out, and then the biodegradable material with antibacterial effect and high strength is obtained by granulation and cutting.

Embodiment 2

[0038] This embodiment provides a method for preparing a filler-reinforced biodegradable material with antibacterial effect and high strength. The steps include:

[0039] S1. Dissolve the dried bio-resin in a solvent, fill it with protective gas, add antibacterial agent, grafting aid and catalyst, stir and react at 45-60°C for 3-4h, then dry at 45-60°C for 12-24h to obtain Antibacterial agent-g-biological resin graft copolymer;

[0040] S2. Add the filler and silane bridging agent to the ethanol aqueous solution in proportion, adjust the pH value to weak acidity, stir and modify, wash and dry; then add the dried modified filler and antibacterial auxiliary agent, boron trifluoride ether Solvent mixing, stirring reaction, centrifugal washing, drying to obtain antibacterial functional filler

[0041] S3. Pass the polylactic acid, antibacterial agent-g-biological resin graft copolymer and compatibilizer through the extruder, and the extrusion temperature (from the feeding section...

Embodiment 3

[0047] This example is to prepare a biodegradable material with antibacterial effect and high strength according to the preparation method described in Example 1 with the raw materials described in Formula 1. Its formula one is as follows:

[0048] Recipe one:

[0049]

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PUM

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Abstract

The invention discloses a preparation and an application of a biodegradable material with an antibacterial effect and a high strength. Biological resin and polylactic acid are added and blended to improve the mechanical properties and the thermal stability of polylactic acid, and the biological resin is grafted with antibacterial groups and is uniformly distributed in the polylactic acid matrix, so that the polylactic acid biodegradable material is endowed with an excellent antibacterial performance, and the influence of the decomposition effect of microorganisms in the environment on the storage, the service life and the safety of the material is prevented. The barrier property and the antibacterial property of polylactic acid can be further improved by performing functional modificationon a filler, so the safety of foods or medicines in the packaging material is guaranteed, and the high standard for the performance of the polylactic acid material in the industry is met. The method has the advantages of simplicity, high efficiency and low cost, and can be applied to the wide fields of material packaging and the like.

Description

technical field [0001] The invention relates to the technical field of biodegradable materials, in particular to a biodegradable material with antibacterial effect and high strength and its preparation and application. Background technique [0002] With the progress of society, people are becoming more and more aware of the importance of environmental protection, and the means of reducing white pollution and promoting environmental protection are also constantly innovating with the progress of raw material production and processing technology. Polylactic acid is a polymer that is completely biodegradable, recyclable and biocompatible. It can be better used in the packaging field and can greatly reduce white pollution caused by daily life. However, there are still many problems in the application of polylactic acid in replacing traditional plastics in packaging films, such as polylactic acid has poor heat resistance, low strength and toughness, poor water and oxygen barrier p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L51/08C08L87/00C08L101/06C08G63/91C08G73/06C08G81/00C08K9/04C08K3/04C08K3/34C08K3/22C08K3/32
CPCC08L67/04C08G63/912C08G73/0611C08G81/00C08L2201/06C08L2201/14C08L2205/03C08L2205/02C08L2205/035C08L2205/025C08L2205/08C08K2003/2296C08K2003/325C08K2003/2237C08K2201/014C08L67/02C08L51/08C08L79/04C08L87/005C08L101/06C08K9/08C08K9/04C08K3/042C08K3/34C08K3/22C08K3/32
Inventor 谭金陈岳刘小超何清林
Owner 湖南绿斯达生物科技有限公司
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