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Near-infrared light response type slow-release composite packaging film as well as preparation method and application thereof

A near-infrared light response, composite packaging technology, applied in packaging, application, wrapping paper, etc., can solve the problems of poor preservation effect and no preservation effect, and achieve the effect of controllable release and prolonging the preservation period of food

Active Publication Date: 2022-03-08
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the release of active substances in active food packaging films is not controlled, and it is in a released state after the film is prepared. It is necessary to use the film for food packaging as soon as possible. Poor, or even no preservation effect

Method used

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  • Near-infrared light response type slow-release composite packaging film as well as preparation method and application thereof
  • Near-infrared light response type slow-release composite packaging film as well as preparation method and application thereof
  • Near-infrared light response type slow-release composite packaging film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0027] (1) Preparation of microsphere suspension: add food preservation agent and amphiphilic polymer containing o-nitrobenzyl ester structure into deionized water, and undergo high-speed homogenization to obtain microsphere suspension wrapped in food preservation agent; The weight ratio of food preservative, amphiphilic polymer and deionized water is 1:2–5:20–50;

[0028] (2) Preparation of spray solution: dissolve the base material of edible film in deionized water, then add the above-mentioned microsphere suspension and stir evenly; wherein the weight of deionized water, the base material of edible film and microsphere suspension The ratio is 50–100:5–20:2;

[0029] (3) Preparation of composite packaging film: Corona treatment is performed on the polymer film, and then the spray solution is sprayed on the corona-treated surface of the polymer film, and dried in a blast oven at 40–60°C to obtain a near-infrared light-responsive slow release composite packaging film.

Embodiment 1

[0032] This example provides a method for preparing a near-infrared light-responsive slow-release composite packaging film, specifically as follows:

[0033] (1) 1 gram of clove essential oil and 2 grams of amphiphilic polymer (m=4, n=100) containing o-nitrobenzyl ester structure are added to 50 grams of deionized water, through high-speed homogenization, to obtain the wrapped clove essential oil microsphere suspension;

[0034] (2) Dissolve 5 grams of gelatin in 100 grams of deionized water, then add 2 grams of microsphere suspension, and stir evenly;

[0035] (3) Corona treatment is performed on the polyethylene film, and then the spray solution is sprayed on the corona treated surface of the polymer film, and dried in a blast oven at 40°C to obtain a near-infrared photoresponsive slow-release composite packaging film.

[0036] The near-infrared light-responsive slow-release composite packaging film is used to store tomatoes, and then activated by near-infrared light to rel...

Embodiment 2

[0038] This example provides a method for preparing a near-infrared light-responsive slow-release composite packaging film, specifically as follows:

[0039] (1) 1 gram of cinnamon essential oil and 5 grams of amphiphilic polymer (m=18, n=20) containing o-nitrobenzyl ester structure were added to 30 grams of deionized water, and homogenized at a high speed to obtain the wrapped cinnamon essential oil microsphere suspension;

[0040] (2) Dissolve 20 grams of pectin in 80 grams of deionized water, then add 2 grams of microsphere suspension, and stir evenly;

[0041] (3) Corona treatment is performed on the polylactic acid film, and then the spray solution is sprayed on the corona-treated surface of the polymer film, and dried in a blast oven at 60° C. to obtain a near-infrared light-responsive slow-release composite packaging film.

[0042] The near-infrared light-responsive slow-release composite packaging film is used to hold oranges, and then activated by near-infrared light...

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Abstract

The invention provides a near-infrared light response type slow-release composite packaging film and a preparation method and application thereof.The composite packaging film is of a two-layer structure, the outer layer is a polymer film, and the inner layer is an edible film containing near-infrared light response dissociation microspheres; the food preservative is prepared by wrapping a food preservative with an amphiphilic polymer containing an o-nitrobenzyl ester structure. According to actual use conditions, after food is packaged, through irradiation of external near-infrared light, microsphere shells in the inner layer of the composite film are dissociated, active substances are released, controllable release of fresh-keeping active ingredients is achieved, and the composite film is used for food fresh keeping and can greatly prolong the fresh-keeping period of food.

Description

technical field [0001] The invention belongs to the technical field of composite films, and in particular relates to a near-infrared light-responsive slow-release composite packaging film and its preparation method and application. Background technique [0002] Active food packaging films can release antimicrobials and antioxidants to extend the shelf life of food. At present, the release of active substances in active food packaging films is not controlled, and it is in a released state after the film is prepared. It is necessary to use the film for food packaging as soon as possible. Poor, or even no preservation effect. [0003] Under the action of near-infrared light, the o-nitrobenzyl ester structure will undergo photocleavage, and it is often used as a carrier for photoresponsive drugs. The near-infrared light-responsive amphiphilic polymer can be obtained by connecting hydrophilic polyethylene glycol and hydrophobic long-chain alkanes with the structure of o-nitrobe...

Claims

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Application Information

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IPC IPC(8): C08J7/04C08J7/12C09D189/00C09D105/06C09D105/04C09D7/65A23L3/00B65D65/42B65D65/46C08L23/06C08L67/04C08L23/12C08L67/02
CPCC08J7/0427C08J7/123B65D65/42B65D65/463B65D2565/381C08J2323/06C08J2367/04C08J2323/12C08J2367/02C08J2489/00C08J2405/06C08J2405/04C08J2491/00C08J2471/02Y02W90/10
Inventor 董庆丰李立戴雅琦杨岚巩凡
Owner SHANGHAI OCEAN UNIV
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