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Antibacterial preservative film and preparation method thereof

A fresh-keeping film and fresh technology, applied in the field of fresh-keeping film, can solve the problems of increased material cost, difficult degradation of precious metals, environmental soil pollution, etc., and achieve the effects of promoting release, enhancing interface effect, and improving interface bonding force.

Inactive Publication Date: 2019-02-01
蚌埠尚岛宜家日用品科技工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, the total amount of plastic film preservation of fruits and vegetables accounts for more than 60% of the total storage. Functional preservation films have developed rapidly, such as ethylene adsorption films with zeolite molecular sieves, antibacterial preservation films with metallic silver, etc., but these preservation films are due to the addition of precious metals. , not only increases the cost of materials, but also precious metals are difficult to degrade, and will cause environmental soil pollution after being discarded. Therefore, its application and promotion are limited to a certain extent. To explore a new type of fresh-keeping film, so that it not only has antibacterial and fresh-keeping functions, but also is green and environmentally friendly.

Method used

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  • Antibacterial preservative film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] An antibacterial fresh-keeping film, characterized in that it is made of the following parts by weight of raw materials:

[0019] Fresh aloe leaves 10, fresh toon buds 5, montmorillonite 5, polylactic acid slices 80, ascorbic acid 1, polymethylethylene carbonate 2, methyl salicylate 10.

[0020] Further, the preparation method includes the following steps:

[0021] (1) Clean the fresh aloe leaves and dry them at 30°C for 2h before use; take the fresh toon buds picked in March, rinse them with clean water and wipe off the surface water, then add 3 times the volume with the above aloe leaves Put it into a juice extractor at 50℃ and extract the juice, then put the resultant in a sealed environment at 80℃, 200rpm, -0.85MPa, stir and extract under negative pressure for 2h, and then filter to obtain the extract;

[0022] (2) Add montmorillonite to the extract obtained in step (1), disperse it by ultrasonic at 70℃ for 40min, then put it at 5℃ for 3h, then put it at 90℃ for 20min, then...

Embodiment 2

[0028] An antibacterial fresh-keeping film, characterized in that it is made of the following parts by weight of raw materials:

[0029] Fresh aloe leaves 11, fresh toon buds 7, montmorillonite 6, polylactic acid slices 90, ascorbic acid 2, polymethylethylene carbonate 3, and methyl salicylate 15.

[0030] Further, the preparation method includes the following steps:

[0031] (1) Clean the fresh aloe leaves and dry them at 35°C for 3 hours before use; take the fresh toon buds picked in April, rinse them with clean water and wipe off the surface water, then add 4 times the volume with the above aloe leaves Put it into a juice extractor at a temperature of 53°C without ethanol, and then put the resultant into a sealed environment at 82°C, 250rpm, -0.9MPa, stir under negative pressure for 3h, and then filter to obtain the extract;

[0032] (2) Add montmorillonite to the extract obtained in step (1), disperse by ultrasonic at 72°C for 45min, then put it at 8°C for 4h, then put it at 91°C ...

Embodiment 3

[0038] An antibacterial fresh-keeping film, characterized in that it is made of the following parts by weight of raw materials:

[0039] Fresh aloe leaves 12, fresh toon buds 10, montmorillonite 8, polylactic acid slices 100, ascorbic acid 2, polymethyl ethylene carbonate 3, methyl salicylate 20.

[0040] Further, the preparation method includes the following steps:

[0041] (1) Clean the fresh aloe leaves and dry them at 40°C for 3 hours before use; take the fresh toon buds picked in April, rinse them with water and wipe off the surface water, and then add 5 times the volume with the above aloe leaves Put it into a juice extractor at 55°C without ethanol, put the resultant into a sealed environment at 84°C, 300rpm, -0.1MPa, stir under negative pressure for 3h, and then filter to obtain the extract;

[0042] (2) Add montmorillonite to the extract obtained in step (1), disperse it by ultrasonic at 75°C for 50min, then place it at 10°C for 4h, then place it at 92°C for 30min, then at 60...

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Abstract

The invention discloses an antibacterial preservative film and a preparation method thereof. The preservative film prepared in the invention has good fresh-keeping and antibacterial effects, and polylactic acid is safe and nontoxic, can be completely degraded after being discarded, and can effectively alleviate the white pollution problem. Methyl salicylate added in the process of extracting aloevera and Chinese toon sprout cooperates with negative pressure treatment in the extraction process to promote the release of active ingredients and enhance the antibacterial effect of the final preservative film, obtained extract is used to modify montmorillonite in order to increase the interfacial bonding force between the montmorillonite and the polylactic acid substrate and enhance the interfacial effect, so the structure of the preservative film is dense, and the fresh-keeping effect is enhanced; and aloe leaves and the Chinese toon sprouts are compounded, so the synergistic effect of thealoe leaves and the Chinese toon sprouts enhances the antibacterial effect of the preservative film, thereby the preservative film has a better antibacterial effect than the aloe leaves used alone.

Description

Technical field [0001] The invention belongs to the technical field of fresh-keeping film, in particular to an antibacterial fresh-keeping film and a preparation method thereof. Background technique [0002] In recent years, the total amount of fresh-keeping fruits and vegetables with plastic film accounts for more than 60% of the total storage. Functional cling films have developed rapidly, such as ethylene adsorption films with zeolite molecular sieve and antibacterial cling films with metallic silver. However, these cling films are due to the addition of precious metals. , Which not only increases the material cost, but also the precious metals are difficult to degrade, which will cause environmental soil pollution after being discarded. Therefore, its application and promotion are limited to a certain extent. Explore a new type of fresh-keeping film to make it both antibacterial and fresh-keeping functions, while being green and environmentally friendly. [0003] It is the diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L69/00C08K13/06C08K9/04C08K3/34C08K5/134C08K5/00C08J5/18
CPCC08J5/18C08J2367/04C08J2469/00C08K3/346C08K5/0058C08K5/1345C08K9/04C08K13/06
Inventor 袁志杰王丹
Owner 蚌埠尚岛宜家日用品科技工业有限公司