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Preparation method and application of biodegradable plastic thin film

A plastic film and biodegradation technology, applied in the field of preparation of biodegradable plastic films, can solve the problems of use, toxic and harmful catalysts, etc., and achieve the effects of easy operation, excellent degradable performance, and economical and accessible sources.

Inactive Publication Date: 2018-01-05
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing biodegradable plastic films are prepared by blending or copolymerizing natural polymer materials and various polyesters. Although some of them are biodegradable, the preparation process will use toxic and harmful substances. Catalysts, crosslinking agents, etc.

Method used

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  • Preparation method and application of biodegradable plastic thin film

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preparation example Construction

[0025] A kind of preparation method of biodegradable plastic film of the present invention comprises the following steps:

[0026] 1) According to the mass ratio, add 0.1-20 parts of polyvinyl alcohol into 10-1000 parts of deionized water, stir at 80-120°C to dissolve completely, and obtain matrix A, which is cooled to room temperature for later use; Add 0.1-500 parts of natural polymer polysaccharide to 10-1000 parts of deionized water, stir at 10-100°C to dissolve completely, obtain matrix B, cool to room temperature for later use;

[0027] 2) At 60-100°C, slowly add (10-20 parts) B into (10-50 parts) A, continue to stir and heat until the mixture is uniform, and obtain matrix C, which is cooled to room temperature for later use; the stirring speed is 50-50 500r / min, the time is 1 to 12 hours.

[0028] 3) Mix 10-20 parts of matrix C, 0.5-20 parts of microorganisms, 0.01-10 parts of nutrient solution and 0.05-5 parts of pH regulator, and stir evenly at a temperature of 25-40...

Embodiment 1

[0031] Using natural polysaccharide compounds and polyvinyl alcohol compounds as raw materials, introducing fermented yeast as a degradation accelerator to prepare biodegradable plastic films, the preparation steps are:

[0032] In the first step, add 0.1 parts of polyvinyl alcohol into 10 parts of deionized water according to the mass ratio, stir at 80°C for 10 hours to dissolve it, and obtain matrix A; Cyclodextrin was added to 10 parts of deionized water and stirred at 10° C. for 0.1 hour to obtain matrix B.

[0033] In the second step, at 60°C, slowly add 10 parts of B to 10 parts of A, continue stirring and heating for 3 hours to make it uniform, and obtain matrix C.

[0034] In the third step, the prepared matrix C is cooled to room temperature, and 10 parts of matrix C, 0.5 part of fermenting yeast, 0.01 part of glucose, 0.01 part of peptone, 0.05 part of malic acid regulator, 0.05 part of sodium bicarbonate are taken, and the temperature is 25°C, stirring speed is 260...

Embodiment 2

[0036] Using natural polysaccharide compounds and polyvinyl alcohol compounds as raw materials, introducing fermented yeast as a degradation accelerator to prepare biodegradable plastic films, the preparation steps are:

[0037] In the first step, 0.1 parts of polyethylene glycol and 1.5 parts of polyvinyl alcohol are added to 100 parts of deionized water according to the mass ratio, and stirred at 90 ° C for 10 hours to obtain matrix A; the mass ratio of 1.5 parts Add modified starch and 1.5 parts of hydroxyethyl cellulose to 10 parts of deionized water, and stir at 70° C. for 0.6 hours to obtain matrix B.

[0038] In the second step, slowly add B into A at 80°C, and continue stirring and heating for 3 hours to obtain matrix C.

[0039] In the third step, the prepared base C is cooled to room temperature, and 15 parts of base C, 5 parts of fermented yeast, 0.5 part of glucose, 0.3 part of beef powder, 0.2 part of lactic acid, and 0.1 part of sodium carbonate are taken at a te...

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Abstract

The invention discloses a preparation method and application of biodegradable plastic thin film. According to the method, natural polysaccharide compounds and polyalcohol compounds serve as raw materials, fermentation yeast is introduced as a degradation promoter, and the biodegradable plastic thin film is prepared; the operation of the whole process is simple, no pollution or toxicity is caused,the reaction energy consumption is low, and the prepared biodegradable plastic thin film has the advantages of being even in composition and excellent in biodegradability and dye adsorption performance. According to the preparation method, a gel system is formed in a blending compound mode through the utilization of the synergistic action of natural high-molecular materials and synthetic high-molecules, the natural, environment-friendly and biodegradable plastic thin film is prepared with the microorganisms as the degradation promoter, the required raw materials are wide in source range, economical and easy to obtain, and the prepared biodegradable plastic thin film has the advantages of being biodegradable, natural, environmentally friendly and capable of being re-utilized.

Description

technical field [0001] The invention belongs to a natural environment-friendly biodegradable polymer material containing microorganisms, and in particular relates to a preparation method and application of a biodegradable plastic film. Background technique [0002] Today, with the continuous development of science and technology, plastic film products have become a common and indispensable thing in people's lives. Plastic films such as disposable plastic bags and express packaging bags can be seen everywhere. The raw materials of traditional plastic film products are mostly various derivatives of petroleum. As we all know, petroleum is a non-renewable resource. Therefore, it is urgent to find suitable or even better plastic substitutes before petroleum resources are exhausted. On the other hand, with the enhancement of people's awareness of environmental protection, the era of purely pursuing product performance has passed, and now people need the environmental friendliness ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L3/02C08L5/16C08L89/00C08L3/04C08L1/28C08L33/02C08L5/04C08L33/26C08K5/092C08K3/26C08K5/09C08K5/17C08K3/32
Inventor 张敏田芙蓉李成涛
Owner SHAANXI UNIV OF SCI & TECH
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