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Rice starch based biodegradable packaging film and preparation method thereof

A rice starch, biodegradation technology, applied in the direction of biological packaging, sustainable packaging, packaging, etc., can solve the problems of resource waste, plastic film discarding, difficult to decompose and absorb, etc., and achieve good acid and alkali resistance and strong antibacterial property , high-strength effect

Inactive Publication Date: 2014-02-05
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the packaging films used by people in daily life are mainly polyethylene or polyvinyl chloride plastic films. These plastic films are difficult to be decomposed by soil microorganisms and absorbed by plant roots. caused adverse effects
Moreover, these polyethylene or polyvinyl chloride plastic films have no antibacterial ability, and it is difficult to preserve food packaged in such films for a long time, which brings hidden dangers to food safety.
For a long time, people have used different methods to improve the performance of plastic films for daily life packaging, but none of them can fundamentally solve the problem of biodegradability of plastic films
On the other hand, in the process of rice processing, it is inevitable to produce a large amount of broken rice, which is rich in starch. Due to technical limitations, the starch of these broken rice has not been fully utilized, resulting in a waste of resources

Method used

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  • Rice starch based biodegradable packaging film and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The rice starch-based biodegradable packaging film of this embodiment is made of the following raw materials in weight percentage: 35% rice starch, 0.03% α-amylase, 10% chitosan, 4% sodium benzoate, and 2.95% potassium sorbate , 6% propionic anhydride, 20% polyvinyl alcohol (PVA), 0.02% glutaraldehyde, 2% ethylene glycol, 20% distilled water, a total of 1Kg of raw materials.

[0019] The preparation method of the rice starch-based biodegradable packaging film of the present embodiment comprises the following steps:

[0020] (1) Prepare α-amylase solution: Divide the prepared 200ml of distilled water into two parts, 100ml each, add 0.3g of α-amylase to 100ml of distilled water, stir well to obtain α-amylase solution; the other part is for later use ;

[0021] (2) Add the α-amylase solution obtained in step (1) into a beaker, preheat it to 52°C and place it in a 52°C constant temperature water bath, add rice starch while stirring; then place the beaker containing the mix...

Embodiment 2

[0025] The rice starch-based biodegradable packaging film of the present embodiment is made of the following raw materials in percentage by weight: 40% rice starch, 0.06% α-amylase, 8% chitosan, 4.9% sodium benzoate, 4% Potassium sorbate, 5% propionic anhydride, 17% PVA, 0.04% malondialdehyde, 1% glycerin, 20% distilled water. The preparation method of the rice starch-based biodegradable packaging film of this embodiment is the same as that of Embodiment 1.

Embodiment 3

[0027] The rice starch-based biodegradable packaging film of the present embodiment is made of the following raw materials in percentage by weight: 30% rice starch, 0.06% α-amylase, 8% chitosan, 5.9% sodium benzoate, 3% Potassium sorbate, 5% propionic anhydride, 22% PVA, 0.04% glyoxal, 1% polyethylene glycol, 25% distilled water. The preparation method of the rice starch-based biodegradable packaging film of this embodiment is the same as that of Embodiment 1.

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Abstract

The invention discloses a rice starch based biodegradable packaging film and a preparation method thereof. The rice starch based biodegradable packaging film is prepared from the following raw materials in percentage by weight: 15-55% of rice starch, 0.01-0.1% of alpha-amylase, 5-15% of chitosan, 2-10% of sodium benzoate, 2-10% of potassium sorbate, 2-10% of propionic anhydride, 10-55% of polyvinyl alcohol, 0.01-0.05% of a crosslinking agent, and 0.8-10% of a plasticizer and 15-30% of distilled water. The invention also discloses a preparation method of the rice starch based biodegradable packaging film. The rice starch based biodegradable packaging film disclosed by the invention is strong in antibacterial activity, good in water resistance and acid and alkali resistance, and high in strength, and after being disposed, can be decomposed into carbon dioxide and water by microorganisms in environments.

Description

technical field [0001] The invention relates to a biodegradable packaging film and a preparation method thereof, in particular to a rice starch-based biodegradable packaging film and a preparation method thereof. Background technique [0002] At present, the packaging films used by people in daily life are mainly polyethylene or polyvinyl chloride plastic films. These plastic films are difficult to be decomposed by soil microorganisms and absorbed by plant roots. caused adverse effects. Moreover, these polyethylene or polyvinyl chloride plastic films have no antibacterial ability, so it is difficult to preserve the food packaged in this film for a long time, which brings hidden dangers to food safety. For a long time, people have used different methods to improve the performance of plastic films for daily life packaging, but none of them can fundamentally solve the problem of biodegradability of plastic films. On the other hand, in the process of rice processing, it is ine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/06C08L29/04C08L5/08C08K5/098C08J3/24C08J7/04C12P19/14B65D65/38
CPCY02W90/10
Inventor 孙术国林亲录杨涛徐友志丁玉琴罗非君周慧
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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