Responsive slow-release active packaging film as well as preparation method and application thereof

A packaging film and active technology, which is applied in the field of slow-release active packaging film and preparation, can solve the problems affecting the functional effect and unresolved excitation mechanism, etc.

Pending Publication Date: 2020-11-27
SHANGHAI OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, for the release type active packaging film, the film is in the release state after the preparation is completed, and its excitation mechanism has not yet been resolved. During the storage process before use in food packaging, a certain amount of release will also occur due to the influence of environmental temperature and humidity, thus affecting Functional effect in actual use

Method used

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  • Responsive slow-release active packaging film as well as preparation method and application thereof
  • Responsive slow-release active packaging film as well as preparation method and application thereof
  • Responsive slow-release active packaging film as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0035]

[0036] The preparation method of response type sustained-release active packaging film of the present invention comprises the steps:

[0037] (1) Preparation of pure gelatin solution: add 10±1g of gelatin powder into 100±1mL of distilled water, heat at 50-55°C for 1±0.1h to obtain a gelatin solution, and dropwise add 100±1mL of Acetone, remove the supernatant, redissolve the remaining precipitate in 100±1mL of distilled water, add 2.5±0.1g of glycerol, mix well and set aside;

[0038] (2), preparation of the gelatin solution containing the active substance: adding 1±0.1g of the active substance into the pure gelatin solution of step (1), uniformly dispersed and then set aside;

[0039] (3), the preparation of the gelatin solution containing magnetite nanoparticle: the magnetite nanoparticle of 10 ± 1g is added in the pure gelatin solution of step (1), and use ultrasonic treatment after mixing solution for subsequent use;

[0040] (4), preparation of active packagin...

Embodiment 1

[0048] The preparation method of the response type slow-release active packaging film of the present embodiment comprises the following steps:

[0049] (1), preparation of pure gelatin solution: add 10g of gelatin powder into 100mL of distilled water, heat at 55°C for 1h to obtain a gelatin solution, add 100mL of acetone dropwise to the gelatin solution, remove the supernatant, and Redissolve the precipitate in 100mL distilled water, add 2.5g glycerin, mix well and set aside;

[0050] (2), preparation of the gelatin solution containing ε-polylysine hydrochloride: 1g ε-polylysine hydrochloride is added in the pure gelatin solution of step (1), disperse evenly and set aside;

[0051] (3), preparation of the gelatin solution containing magnetite nanoparticles: add 10g of magnetite nanoparticles into the pure gelatin solution of step (1), and use the ultrasonic treatment mixed solution for 15min for subsequent use;

[0052] (4), preparation of active packaging film: at first the po...

Embodiment 2

[0054] The preparation method of the response type slow-release active packaging film of the present embodiment comprises the following steps:

[0055] (1), preparation of pure gelatin solution: add 10g of gelatin powder into 100mL of distilled water, heat at 55°C for 1h to obtain a gelatin solution, add 100mL of acetone dropwise to the gelatin solution, remove the supernatant, and Redissolve the precipitate in 100mL distilled water, add 2.5g glycerin, mix well and set aside;

[0056] (2), the preparation of the gelatin solution that contains sodium ascorbate: 1g sodium ascorbate is joined in the pure gelatin solution of step (1), after dispersing evenly, set aside;

[0057] (3), preparation of the gelatin solution containing magnetite nanoparticles: add 10g of magnetite nanoparticles into the pure gelatin solution of step (1), and use the ultrasonic treatment mixed solution for 15min for subsequent use;

[0058] (4), preparation of active packaging film: at first the polyadi...

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Abstract

The invention provides a responsive slow-release active packaging film as well as a preparation method and an application thereof. The active packaging film is of a multi-layer structure formed by compounding an inner layer, a middle layer and an outer layer, the inner layer is a gelatin film containing magnetite nanoparticles and has a magnetic field response function, the middle layer is a gelatin film containing a water-soluble antibacterial agent or a water-soluble antioxidant, and the outer layer is a common polymer film. The invention discloses a packaging film. Under the action of an external magnetic field, the permeability of the inner layer of the film can be changed, release of active substances of the middle layer is stimulated, the active film is in a releasable state only after being packaged and used, the active effect of the prepared film is effectively guaranteed, and the film is applied to food packaging and more beneficial to food protection and food shelf life prolonging. Therefore, the packaging film solves the problem of an excitation mechanism of an active film, so that the packaging film is in a controllable state in the whole circulation use process.

Description

technical field [0001] The invention belongs to the technical field of film slow-release materials, and in particular relates to a slow-release active packaging film based on magnetic field response, a preparation method and an application. Background technique [0002] Compared with traditional food packaging technology, active packaging technology can extend food shelf life, improve sensory quality and food safety. Slow-release active packaging film is a type of active packaging. It uses film materials as the base material, and adds active substances such as antibacterial agents and antioxidants into the film base material. functional active film. By adjusting the release rate of the active substance to make it slow and sustained release, the effective action time of the active substance is prolonged, thereby prolonging the shelf life of the food. At present, for the release type active packaging film, the film is in the release state after the preparation is completed, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C08J7/12C08J5/18C09D189/00C09D7/63C09D5/14C09D5/23B65D65/40C08L67/02C08L67/04C08L77/00C08L23/06C08L23/12
CPCC08J7/042C08J7/0427C08J7/12C08J5/18C09D189/00C09D7/63C09D5/14C09D5/23B65D65/40C08J2367/02C08J2367/04C08J2377/00C08J2323/06C08J2323/12C08J2489/00C08J2477/04C08K2201/011C08K2201/01C08L77/04C08K5/053C08K3/00C08K5/1535Y02W90/10Y02A40/90
Inventor 陈晨伟王佳熙王蕾谢晶
Owner SHANGHAI OCEAN UNIV
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