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Degradable type environment-friendly sweet potato starch film and preparation method thereof

A technology of sweet potato starch and environmental protection, which is applied in the field of degradable sweet potato starch environmental protection film and its preparation, can solve the problems of slow degradation speed and insufficient mechanical properties, and achieve enhanced mechanical properties, good biodegradability, and smooth surface Effect

Inactive Publication Date: 2018-06-01
浙江誉禾科技发展有限公司
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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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A degradable sweet potato starch environmental protection film, its raw materials include by weight: 50 parts of polyethylene, 30 parts of polyvinyl alcohol, 25 parts of nano-cellulose freeze-dried powder, 40 parts of organic sweet potato starch, 10 parts of absolute ethanol, glycerin 4 parts.

[0023] The preparation method of described degradable sweet potato starch environmental protection film, comprises the following steps:

[0024] a. Preparation of polyethylene basic solution: put polyethylene particles into a water bath at 120°C, dissolve under mixing and stirring conditions, after the polyethylene particles are completely dissolved, add polyvinyl alcohol particles, mix and dissolve to obtain polyethylene base solution;

[0025] b. Prepare nano-organic cellulose homogenate: add nano-cellulose lyophilized powder into distilled water, and form a nano-cellulose homogenate with a mass fraction of 3.5% under the action of a 165MPa high-pressure homogenizer;

[0026...

Embodiment 2

[0033] A degradable sweet potato starch environmental protection film, its raw materials include by weight: 60 parts of polyethylene, 15 parts of polyvinyl alcohol, 30 parts of nano-cellulose freeze-dried powder, 20 parts of organic sweet potato starch, 8 parts of absolute ethanol, glycerin 2 servings.

[0034] The preparation method of described degradable sweet potato starch environmental protection film, comprises the following steps:

[0035] a. Preparation of polyethylene basic solution: put polyethylene particles into a water bath at 120°C, dissolve under mixing and stirring conditions, after the polyethylene particles are completely dissolved, add polyvinyl alcohol particles, mix and dissolve to obtain polyethylene base solution;

[0036] b. Prepare nano-organic cellulose homogenate: add nano-cellulose lyophilized powder into distilled water, and form a nano-cellulose homogenate with a mass fraction of 3.5% under the action of a 165MPa high-pressure homogenizer;

[00...

Embodiment 3

[0044] A degradable sweet potato starch environmental protection film, its raw materials include by weight: 75 parts of polyethylene, 10 parts of polyvinyl alcohol, 15 parts of nano-cellulose freeze-dried powder, 50 parts of organic sweet potato starch, 5 parts of absolute ethanol, glycerin 5 servings.

[0045] The preparation method of described degradable sweet potato starch environmental protection film, comprises the following steps:

[0046] a. Preparation of polyethylene basic solution: put polyethylene particles into a water bath at 120°C, dissolve under mixing and stirring conditions, after the polyethylene particles are completely dissolved, add polyvinyl alcohol particles, mix and dissolve to obtain polyethylene base solution;

[0047] b. Prepare nano-organic cellulose homogenate: add nano-cellulose lyophilized powder into distilled water, and form a nano-cellulose homogenate with a mass fraction of 3.5% under the action of a 165MPa high-pressure homogenizer;

[00...

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PUM

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Abstract

A degradable type environment-friendly sweet potato starch film comprises raw materials in parts by weight as follows: 50-75 parts of polyethylene, 10-30 parts of polyvinyl alcohol, 15-30 parts of freeze-dried nanocellulose powder, 20-50 parts of organic sweet potato starch, 5-10 parts of absolute ethyl alcohol and 2-5 parts of glycerin. The film is high in degradation speed and has better mechanical property and barrier property.

Description

technical field [0001] The invention relates to the field of food packaging materials, in particular to a degradable sweet potato starch environmental protection film and a preparation method thereof. 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 and water and soil 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 performance of degradable film is similar to that of synthetic plastic packaging film, and at the same time, it has the characteristics superior to synthetic plastic packaging film, mainly reflected in the unique barrier properties, safety and pollution-free advantages, so degradable film has attracted muc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L29/04C08L1/02C08L3/02C08K5/053C08J5/18
CPCC08J5/18C08J2323/06C08J2403/02C08J2429/04C08L23/06C08L2201/06C08L2201/14C08L2205/035C08L29/04C08L1/02C08L3/02C08K5/053
Inventor 杨培雪王佩斯曾辊
Owner 浙江誉禾科技发展有限公司
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