Method for preparing antibacterial edible films

An antibacterial and edible technology, which is applied in the field of preparation of edible films, can solve the problems of insufficient antibacterial ability and off-white color, and achieve the effect of good film-forming effect, off-white color and low temperature

Active Publication Date: 2015-12-02
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The technical problem to be solved by the present invention is to overcome the defect of insufficient antibacterial ability of common film-forming materials without adding any reaction solvent and auxiliary agent, and to prepare a polysaccharide matrix with high broad-spectrum antibacterial activity by usi

Method used

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  • Method for preparing antibacterial edible films
  • Method for preparing antibacterial edible films
  • Method for preparing antibacterial edible films

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0040] Example 1

[0041] Using a stirring ball mill as the reaction device, a mechanical solid phase activation method is used for the ball milling reaction. Pullulan and ε-polylysine are used as raw materials. The mass ratio is 5:1.5, the mechanical activation time is 5 minutes, and the temperature is 25°C. , The stirring speed is 415r / min, and the grinding medium is a stainless steel grinding ball with φ5-10mm to prepare pullulan and ε-polylysine complex. Prepare the film-forming solution according to the ratio of the mass concentration of pullulan and ε-polylysine complex of 2g / 100mL, gelatin of 5g / 100mL, and glycerol of 1g / 100mL: Gelatin was dissolved in distilled water at 80-90°C, and after cooling to 50-60°C, the complex of pullulan and ε-polylysine was added to dissolve, and glycerin was added after cooling to room temperature, stirred uniformly, and stirred magnetically for 10 minutes. The obtained film-forming solution is poured into a polypropylene petri dish, placed ...

Example Embodiment

[0042] Example 2

[0043] The stirring ball mill is used as the reaction device, and the mechanical solid phase activation method is used to carry out the ball milling reaction. Chitosan and ε-polylysine are used as raw materials. The mass ratio is 5:1.8, the mechanical activation time is 10min, and the temperature is 25℃. The stirring speed is 415 r / min, and a complex of chitosan and ε-polylysine is prepared. The film-forming solution was prepared according to the ratio of the mass concentration of the complex of chitosan and ε-polylysine of 2g / 100mL, the mass concentration of gelatin of 5g / 100mL, and the mass concentration of glycerol of 2g / 100mL: first gelatin Dissolve in distilled water at 80~90℃, add the complex of chitosan and ε-polylysine to dissolve after cooling to 50~60℃, add glycerin after cooling to room temperature, stir evenly and magnetically stir for 10min. The film-forming solution is poured into a polypropylene culture dish, placed at room temperature to form a...

Example Embodiment

[0044] Example 3

[0045] The stirring ball mill is used as the reaction device, and the mechanical solid phase activation method is used to carry out the ball milling reaction. The dextran and ε-polylysine are used as raw materials. The mass ratio is 5:2, the mechanical activation time is 8min, and the temperature is 25℃. The stirring speed is 415 r / min, and a complex of dextran and ε-polylysine is prepared. Prepare the film-forming solution according to the ratio of the mass concentration of the complex of dextran and ε-polylysine of 3g / 100mL, the mass concentration of gelatin of 5g / 100mL, and the mass concentration of glycerol of 1g / 100mL: gelatin Dissolve in distilled water at 80-90°C, add the esterified compound of dextran and ε-polylysine after cooling to 50-60°C to dissolve, add glycerin after cooling to room temperature, stir evenly, and magnetically stir for 10 minutes. The film-forming solution is poured into a polypropylene culture dish, placed at room temperature to ...

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Abstract

The invention discloses a method for preparing antibacterial edible films. The method includes adding polysaccharide materials and epsilon-polylysine into a stirring ball mill and enabling the polysaccharide materials and the epsilon-polylysine to carry out ball-milling reaction at the temperature of 25-50 DEG C for the reaction time of 5-10min to obtain polysaccharide and epsilon-polylysine compounds; adding water into the polysaccharide and epsilon-polylysine compounds, gelatin and glycerin to prepare film forming liquor; coating the film forming liquor to form the antibacterial edible films. A mass ratio of the polysaccharide materials to the epsilon-polylysine is 5:0.8-2.2. The method has the advantages that other solvents can be omitted in reaction procedures, the reaction time is short, the temperature is low, products have light colors, good film forming effects can be realized, the films obtained by the aid of the method have broad-spectrum antibacterial activity, and the toughness and the oxygen barrier capacity of the edible films can be improved.

Description

technical field [0001] The invention belongs to the technical field of food packaging materials, and in particular relates to a preparation method of an edible film with antibacterial function. Background technique [0002] Synthetic polymeric plastic packaging is now widely used commercially. Although these polymer materials have good mechanical properties and barrier properties, plastic products generally contain toxic and harmful substances such as plasticizers, which will bring a lot of potential food safety problems. In recent years, due to the advantages of edible film over chemically synthesized packaging film, the research on it has become a current hot spot. The main materials used to prepare the edible film are food materials such as lipids, proteins and polysaccharides, which can be directly eaten and absorbed by the human body, and there is no problem such as environmental pollution. In addition, it also has the functions of maintaining moisture, isolating oxyge...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L5/00C08L5/02C08L5/08C08L77/02B65D65/46
CPCY02A40/90Y02W90/10
Inventor 何荣军王宇光赵瑞娜施俊妃孙培龙
Owner ZHEJIANG UNIV OF TECH
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