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Photo-biodegradable and antibacterial plastic and preparation method thereof

A dual-degradation and plastic technology, which is applied in the field of plastic preparation, can solve the problems of degradable plastics without antibacterial properties, slow degradation speed of degradable plastics, general degradation effect, etc., to achieve accelerated degradation speed, improved degradable performance, and no secondary pollution Effect

Inactive Publication Date: 2018-03-20
李君
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the existing technology has achieved certain results in the research on degradable materials, the existing degradable plastics have the defects of slow degradation rate and general degradation effect. Poor performance, poor thermal stability and other defects, which limit the application of degradable plastics

Method used

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  • Photo-biodegradable and antibacterial plastic and preparation method thereof
  • Photo-biodegradable and antibacterial plastic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh the raw materials in the following weight ratio: 20 parts of polyethylene, 15 parts of calcium carbonate, 15 parts of modified starch, 5 parts of maltodextrin, 5 parts of wood fiber, 1 part of gelatin, 1 part of glycerin, diphenylcyclopropenone 2 parts, 1 part of iron disulfide carbamate, 1 part of nano-titanium dioxide, 8 parts of polyhydroxyalkanoate, 1 part of sodium diacetate, 1 part of sodium lignosulfonate, 2 parts of acetyl tributyl citrate, oxidized polyethylene 2 parts of wax.

[0023] Prepare as follows:

[0024] (1) Add polyethylene, modified starch, maltodextrin, and wood fiber into ethanol, stir at a temperature of 50°C and a pH of 8 to obtain a paste mixture, add the paste mixture to the reaction kettle, and Reaction for 20min at 2MPa;

[0025] (2) dissolving gelatin in glycerin at a temperature of 40° C., and then mixing it with the mixed solution obtained in step (1);

[0026] (3) Mix polyhydroxyalkanoate, sodium diacetate, sodium lignin sulfona...

Embodiment 2

[0030] Weigh the raw materials in the following weight ratio: 25 parts of polyethylene, 20 parts of calcium carbonate, 20 parts of modified starch, 10 parts of maltodextrin, 10 parts of wood fiber, 5 parts of gelatin, 3 parts of glycerin, diphenylcyclopropenone 6 parts, 4 parts of iron disulfide carbamate, 3 parts of nano-titanium dioxide, 12 parts of polyhydroxyalkanoate, 2 parts of sodium diacetate, 3 parts of sodium lignosulfonate, 7 parts of acetyl tributyl citrate, oxidized polyethylene 6 parts of wax.

[0031] Prepare as follows:

[0032] (1) Add polyethylene, modified starch, maltodextrin, and wood fiber into ethanol, stir at a temperature of 70°C and a pH of 9 to obtain a paste mixture, add the paste mixture to the reaction kettle, and Reaction for 25min at 3MPa;

[0033] (2) dissolving gelatin in glycerin at a temperature of 60° C., and then mixing it with the mixed solution obtained in step (1);

[0034] (3) Mix polyhydroxyalkanoate, sodium diacetate, sodium ligni...

Embodiment 3

[0038] Weigh the raw materials in the following weight ratio: 30 parts of polyethylene, 25 parts of calcium carbonate, 25 parts of modified starch, 15 parts of maltodextrin, 15 parts of wood fiber, 10 parts of gelatin, 5 parts of glycerin, diphenylcyclopropenone 10 parts, 7 parts of iron disulfide carbamate, 5 parts of nano-titanium dioxide, 16 parts of polyhydroxyalkanoate, 3 parts of sodium diacetate, 5 parts of sodium lignosulfonate, 12 parts of acetyl tributyl citrate, oxidized polyethylene 10 parts of wax.

[0039] Prepare as follows:

[0040](1) Add polyethylene, modified starch, maltodextrin, and wood fiber into ethanol, and stir under the condition that the temperature is 80°C and the pH is 10 to obtain a paste mixture, which is added to the reaction kettle, and Reaction for 30min at 4MPa;

[0041] (2) dissolving gelatin in glycerin at a temperature of 80° C., and then mixing it with the mixture obtained in step (1);

[0042] (3) Polyhydroxyalkanoate, sodium diaceta...

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Abstract

The invention discloses photo-biodegradable and antibacterial plastic and a preparation method thereof and relates to the technical field of plastic preparation. The photo-biodegradable and antibacterial plastic is prepared from the following raw materials in parts by weight: 20 to 30 parts of polyethylene, 15 to 25 parts of calcium carbonate, 15 to 25 parts of modified starch, 5 to 15 parts of maltodextrin, 5 to 15 parts of wood fibers, 1 to 10 parts of gelatin, 1 to 5 parts of glycerol, 2 to 10 parts of diphenylcyclopropenone, 1 to 7 parts of iron carbamate disulfide, 1 to 5 parts of nano titanium dioxide, 8 to 16 parts of polyhydroxyalkanoate, 1 to 3 parts of sodium diacetate, 1 to 5 parts of sodium lignosulfonate, 2 to 12 parts of acetyl tributyl citrate and 2 to 10 parts of oxidized polyethylene wax. The polyethylene plastic disclosed by the invention has a photo-biodegradable effect; especially, biological degradation and photochemical degradation have a synergetic effect and thedegradation rate is high; meanwhile, the photo-biodegradable and antibacterial plastic has an antibacterial effect and is suitable for producing and manufacturing various plastic products.

Description

technical field [0001] The invention relates to the technical field of plastic preparation, in particular to a double-degradable antibacterial plastic and a preparation method thereof. Background technique [0002] At present, the huge amount of plastic manufacturing and waste has caused irreversible pollution and damage to the environment on which we live. In order to alleviate the shortage of petroleum resources and reduce the harm of white pollution, degradable plastics have become the focus of researchers. [0003] At present, the degradable plastics researched in the world can be divided into four categories, photodegradable plastics, biodegradable plastics, chemically degradable plastics and water degradable plastics, among which photodegradable plastics and biodegradable plastics are widely used. Photodegradation means that under the irradiation of sunlight, photodegradable plastics absorb ultraviolet radiation and undergo photoinitiation, which weakens the bond ener...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L3/02C08L3/04C08L97/02C08L89/00C08L67/04C08L23/30C08K13/02C08K3/26C08K5/053C08K3/22C08K5/11C08K5/39
Inventor 李君贺银仔
Owner 李君
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