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Environmental-friendly coating film for fresh keeping of strawberries and preparation method of environmental-friendly coating film

An environmentally friendly, film-coating technology, applied in the direction of protecting fruits/vegetables with a protective coating, can solve the problems of difficult operation, difficulty in maintaining freshness and prolonging shelf life, and complicated operation, and achieves simple and convenient operation and good freshness preservation. Effect, good application prospect effect

Inactive Publication Date: 2018-06-15
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As we all know, strawberries have high nutritional value and tender and juicy pulp. However, due to the lack of a hard protective outer skin, strawberries are easily damaged and rotten during transportation. It is difficult to preserve freshness and extend shelf life.
Fresh-keeping methods commonly used in the market include cold storage, radiation preservation and PE plastic film preservation, but these preservation methods usually have problems such as high cost, high energy consumption, difficult operation, and unfavorable environmental protection. Therefore, for strawberry fresh-keeping problems, it is necessary to develop a simple, low-cost, green and environmentally friendly fresh-keeping technology
[0003] In order to achieve this goal, for example, a strawberry fresh-keeping method using gas preservation technology is disclosed in Patent Document 1 (Application No.: 201510454932.8), and a strawberry fruit ultrasonic Auxiliary calcium impregnation fresh-keeping method, but both of them have problems such as large energy consumption and complicated operation
In the non-patent literature, a single polymer component is mostly used, which has the problem of poor fresh-keeping effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Weigh 10 grams of starch, add an appropriate amount of water, heat to 70 degrees Celsius, stir to fully dissolve the starch, make a starch aqueous solution with a concentration of 4%, and let it stand for 12 hours;

[0016] (2) Weigh 10 grams of chitosan, add 2 grams of acetic acid, add appropriate amount of water, heat to 70 degrees Celsius, stir to fully dissolve the chitosan, make a 2% chitosan aqueous solution, and let it stand for 12 minutes;

[0017] (3) Weigh 2 grams of methylcellulose, add an appropriate amount of water, heat to 60 degrees Celsius, stir to fully dissolve the methylcellulose, prepare a 1% methylcellulose aqueous solution, and let stand for 12;

[0018] (4) Take an appropriate amount of the solutions obtained in steps (1), (2), and (3) and mix them, heat to 80 degrees Celsius and stir evenly, then weigh an appropriate amount of citric acid and surfactant and add them to the mixed solution to make starch The concentration of chitosan is 1%, the...

Embodiment 2

[0021] (1) Weigh 10 grams of starch, add an appropriate amount of water, heat to 90 degrees Celsius, stir to fully dissolve the starch, make a starch aqueous solution with a concentration of 6%, and let it stand for 24 hours;

[0022] (2) Weigh 10 grams of chitosan, add 2 grams of acetic acid, add an appropriate amount of water, heat to 90 degrees Celsius, stir to fully dissolve the chitosan, prepare a 4% chitosan aqueous solution, and let it stand for 24 hours;

[0023] (3) Weigh 2 grams of methylcellulose, add an appropriate amount of water, heat to 80 degrees Celsius, stir to fully dissolve the methylcellulose, prepare a 2% aqueous solution of methylcellulose, and let it stand for 24 hours;

[0024] (4) Take an appropriate amount of the solutions obtained in steps (1), (2), and (3) and mix them, heat to 80 degrees Celsius and stir evenly, then weigh an appropriate amount of citric acid and surfactant and add them to the mixed solution to make starch 2% concentration of chit...

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PUM

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Abstract

The invention provides an environmental-friendly coating film for fresh keeping of strawberries. The coating film is a mixture consisting of the components in percentage by weight of 1-5% of starch, 0.5-2.5% of chitosan, 0.1-0.5% of methycellulose, 0.01-0.05% of citric acid, 0.005-0.03% of a surfactant, and balance of water. The formula provided by the invention is reasonable, the preparation method is simple, the environmental-friendly coating film has favorable fresh keeping effect on the strawberries, the shelf life of the strawberries is prolonged, and besides, the formula is safe, environmental-friendly, simple and convenient to operate and low in cost, and has favorable economic benefits. The raw materials are easy to obtain.

Description

technical field [0001] The invention belongs to the technical field of preparation for fresh-keeping of fruits and vegetables, and in particular relates to a preparation method of an environment-friendly coating film for strawberry fresh-keeping. Background technique [0002] As we all know, strawberries have high nutritional value and tender and juicy pulp. However, due to the lack of a hard protective outer skin, strawberries are easily damaged and rotten during transportation. It is difficult to preserve freshness and extend shelf life. Fresh-keeping methods commonly used in the market include cold storage, radiation preservation and PE plastic film preservation, but these preservation methods usually have problems such as high cost, high energy consumption, difficult operation, and unfavorable environmental protection. Therefore, for strawberry To solve the fresh-keeping problem, it is necessary to develop a simple, low-cost, green and environmentally friendly fresh-keep...

Claims

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Application Information

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IPC IPC(8): A23B7/16
CPCA23B7/16
Inventor 刘文勇钟环宇吴梦君喻慕琳李樟华朱钦林刘赐
Owner HUNAN UNIV OF TECH