A kind of rapidly degradable soybean protein simulated plastic film and its preparation method

A soybean protein and plastic film technology, which is applied in the field of rapidly degradable soybean protein simulated plastic film and its preparation, can solve the problems of slow degradation speed and insufficient mechanical properties, and achieve uniform thickness, good biodegradability, and water resistance. good performance

Active Publication Date: 2018-10-02
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the films prepared in the above-mentioned patents are all degradable films, the degradation speed is slow and the mechanical properties are not good enough.

Method used

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  • A kind of rapidly degradable soybean protein simulated plastic film and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A rapidly degradable soybean protein simulated plastic film and a preparation method thereof, characterized in that it is prepared according to the following steps:

[0020] (1) Add 2.5% polyvinyl alcohol to the beaker and dissolve it in a water bath at 90°C until the polyvinyl alcohol is completely dissolved and cool to 30-50°C, add 2% soy protein isolate under magnetic stirring, and then add 2 The nanocellulose homogenate after high-pressure homogenization is added with a weight percent content of 5% absolute ethanol and 2.0% glycerin, and then distilled water is added to constant volume;

[0021] (2) Adjust the pH value of the constant volume solution to 7.0, stir continuously with a magnetic stirrer, heat in a water bath at 50°C for 20 minutes, and use an ultrasonic cleaner for 10 minutes to perform defoaming and degassing treatment. After degassing, the film-forming solution is poured into an acrylic plate In the tank, the amount of poured film is 60g;

[0022] (3...

Embodiment 2

[0025] A rapidly degradable soybean protein simulated plastic film and a preparation method thereof, characterized in that it is prepared according to the following steps:

[0026] (1) Add 2% polyvinyl alcohol to the beaker and dissolve it in a water bath at 90°C until the polyvinyl alcohol is completely dissolved and cool to 30-50°C, add 2% soybean protein isolate under magnetic stirring, and then add 2.5 The nanocellulose homogenate after high-pressure homogenization is added with a weight percent content of 5% absolute ethanol and 2.0% glycerin, and then distilled water is added to constant volume;

[0027] (2) Adjust the pH value of the constant volume solution to 7.0, stir continuously with a magnetic stirrer, heat in a water bath at 50°C for 20 minutes, and use an ultrasonic cleaner for 10 minutes to perform defoaming and degassing treatment. After degassing, the film-forming solution is poured into an acrylic plate In the tank, the amount of poured film is 60g;

[0028...

Embodiment 3

[0031] A rapidly degradable soybean protein simulated plastic film and a preparation method thereof, characterized in that it is prepared according to the following steps:

[0032] (1) Add 1.5% polyvinyl alcohol to a beaker and dissolve it in a water bath at 90°C until the polyvinyl alcohol is completely dissolved and cool to 30-50°C, add 4% soybean protein isolate under magnetic stirring, and then add 3 The nanocellulose homogenate after high-pressure homogenization is added with a weight percent content of 5% absolute ethanol and 2.0% glycerin, and then distilled water is added to constant volume;

[0033] (2) Adjust the pH value of the constant volume solution to 7.0, stir continuously with a magnetic stirrer, heat in a water bath at 50°C for 20 minutes, and use an ultrasonic cleaner for 10 minutes to perform defoaming and degassing treatment. After degassing, the film-forming solution is poured into an acrylic plate In the tank, the amount of poured film is 60g;

[0034] ...

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Abstract

The invention discloses a rapid degradation type soybean protein simulation plastic film and a preparation method thereof and belongs to the processing field of biological materials and food packaging technologies. The preparation method of the soybean protein simulation plastic film which can be rapidly degraded and has a certain mechanical strength, elasticity, gas barrier property and water tightness is provided. The soybean protein simulation plastic film is prepared from 2-4% of soybean separation protein, 1.5-2.5% of polyvinyl alcohol, 2-3% of nano-crystalline cellulose and 2% of plasticizer. The nano-crystalline cellulose effectively increases the degradation speed of film materials and improves the mechanical performance of the film materials; the plasticizer is added so that the soybean protein, polyvinyl alcohol and the nano-crystalline cellulose can form a more compact and uniform three-dimensional net structure, and various properties of plastics can be highly simulated. The degradation time of the film ranges from 2 months to 7 months. The simulation plastic film is simple in preparation technology, is convenient to operate, free of pollution to the environment and good in biological compatibility and biodegradability, the requirement for environment friendliness is met, and the plastic film can be widely applied to the food packaging field.

Description

technical field [0001] The invention provides a rapidly degradable soybean protein simulated plastic film and a preparation method thereof, more specifically relates to a rapidly degradable soybean protein isolate / polyvinyl alcohol / nanocellulose simulated plastic packaging film and a preparation method thereof, belonging to biological Material and food packaging technology field. Background technique [0002] Plastic packaging film is widely used, but it is easy to produce toxic and harmful gases and odors, and plastic packaging film is not easy to decompose, which can cause serious "white pollution". Degradable packaging film is a film with a spatial network structure formed from natural degradable substances (such as protein, cellulose, polysaccharides and their derivatives, etc.) through intermolecular interactions. The practicability of degradable film is similar to that of synthetic plastic packaging film, and at the same time it has the characteristics superior to syn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L89/00C08L1/02C08K5/053C08J5/18
CPCC08J5/18C08J2301/02C08J2329/04C08J2389/00C08J2401/02C08J2429/04C08J2489/00C08L1/02C08L29/04C08L89/00C08L2201/06C08L2201/14C08L2203/16C08L2205/03C08K5/053
Inventor 张华江迟玉杰魏春立吕雪鹏李昂邵华吴永庆
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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