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Antibacterial degradable gas barrier material and preparation method thereof

A technology of gas barrier and degradable materials, which is applied in the field of antibacterial and degradable gas barrier materials and its preparation, can solve the problems of difficulty in meeting the performance requirements of plastic film moisture retention, difficulty in meeting food preservation requirements, weakening gas barrier properties, etc., and achieve easy batch production The chemical production, the preparation method are simple and convenient, and the effect of improving the gas barrier property

Pending Publication Date: 2022-05-13
SHANGHAI PRET COMPOSITES +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, degradable materials such as PBAT and other water vapor barrier properties are poor, far lower than PE materials, and it is difficult to meet the moisture retention performance requirements in the use of mulch films.
Used in food packaging, it is also difficult to meet the needs of food preservation due to high oxygen permeability
Especially during use, PBAT will degrade, further weakening its gas barrier properties

Method used

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  • Antibacterial degradable gas barrier material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Weigh PBAT 84.45wt%; PLA 10wt%; ionic liquid modified montmorillonite 5wt%; compatibilizer: 0.5wt%; photoinitiator: 0.05wt%. Mix evenly to obtain mixed raw materials.

[0024] The above-mentioned mixed raw materials are placed in the main feeding bin of the intermeshing co-rotating twin-screw extruder, and are added into the barrel of the extruder through the feeding screw. D is 40, the temperature of each zone of the main cylinder from the feeding port to the outlet of the machine head is set as: 140°C, 140°C, 140°C, 150°C, 150°C, 160°C, 160°C, and the speed of the main engine is 200-300 rpm Minutes, through melt extrusion, cooling, granulation, and drying, an antibacterial and degradable material with good gas barrier properties is obtained.

[0025] The above-mentioned degradable materials are blow molded on a film blowing machine, the blow molding temperature is 140°C, and the film thickness is 30-50 μm. The blown film material is irradiated with ultraviolet light...

Embodiment 2

[0029] Weigh PBAT 79.45wt%; PLA 10wt%; ionic liquid modified montmorillonite 10wt%; compatibilizer: 0.5wt%; photoinitiator: 0.05wt%. Mix evenly to obtain mixed raw materials.

[0030] The above-mentioned mixed raw materials are placed in the main feeding bin of the intermeshing co-rotating twin-screw extruder, and are added into the barrel of the extruder through the feeding screw. D is 40, the temperature of each zone of the main cylinder from the feeding port to the outlet of the machine head is set as: 140°C, 140°C, 140°C, 150°C, 150°C, 160°C, 160°C, and the speed of the main engine is 200-300 rpm Minutes, through melt extrusion, cooling, granulation, and drying, an antibacterial and degradable material with good gas barrier properties is obtained.

[0031] The above-mentioned degradable materials are blow molded on a film blowing machine, the blow molding temperature is 140°C, and the film thickness is 30-50 μm. The blown film material is irradiated with ultraviolet ligh...

Embodiment 3

[0035] Weigh PBAT 69.45wt%; PLA 10wt%; ionic liquid modified montmorillonite 20wt%; compatibilizer: 0.5wt%; photoinitiator: 0.05wt%. Mix evenly to obtain mixed raw materials.

[0036] The above-mentioned mixed raw materials are placed in the main feeding bin of the intermeshing co-rotating twin-screw extruder, and are added into the barrel of the extruder through the feeding screw. D is 40, the temperature of each zone of the main cylinder from the feeding port to the outlet of the machine head is set as: 140°C, 140°C, 140°C, 150°C, 150°C, 160°C, 160°C, and the speed of the main engine is 200-300 rpm Minutes, through melt extrusion, cooling, granulation, and drying, an antibacterial and degradable material with good gas barrier properties is obtained.

[0037] The above-mentioned degradable materials are blow molded on a film blowing machine, the blow molding temperature is 140°C, and the film thickness is 30-50 μm. The blown film material is irradiated with ultraviolet ligh...

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Abstract

The invention discloses an antibacterial degradable gas barrier material and a preparation method thereof. The material is composed of the following raw materials in parts by weight: 74-99 wt% of a degradable polymer; 1 to 20 weight percent of ionic liquid modified montmorillonite; 0.1 to 5 wt% of a compatilizer; and 0.01 to 1 wt% of a photoinitiator. The material prepared by the invention has good gas barrier property, has a good inhibition effect on gram negative bacteria and positive bacteria such as escherichia coli and staphylococcus aureus, and also has certain degradation performance. Compared with the same type, the production process is simple, is convenient for industrial production, and is green and environment-friendly.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to an antibacterial and degradable gas barrier material and a preparation method thereof. Background technique [0002] The use of agricultural film materials originated in the 1930s, mainly for greenhouse film and soil surface film. Mulch film can maintain soil temperature, moisture, reduce weeds and other applications, which can increase plant production speed and yield. At present, most of the agricultural film materials are PE materials, but PE cannot be degraded, and most of the post-processing of waste films is landfill, which has a very serious impact on the human living environment. At present, local governments encourage the use of degradable materials for agricultural films. The mechanical properties of the degradable material PBAT are the closest to PE, so PBAT is widely used in the field of plastic films. However, degradable materials such as PBAT have poor w...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L67/04C08L33/12C08K9/04C08K3/34
CPCC08L67/02C08L2201/14C08L2201/06C08K2201/011C08L67/04C08L33/068C08K9/04C08K3/346
Inventor 赵丽萍冯杨殷嘉兴王溢张千惠张锴蔡莹蔡青周文
Owner SHANGHAI PRET COMPOSITES
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