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Antibacterial film as well as preparation method and application thereof

A technology of antibacterial film and pectin, which is applied in the field of antibacterial film and its preparation, can solve problems such as difficulties, and achieve the effects of excellent antibacterial property, simple preparation method, and wide source of raw materials

Inactive Publication Date: 2020-10-13
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, how to select a suitable antibacterial agent from many natural materials with antibacterial activity and prepare a film with the above-mentioned basic raw materials, overcome the antagonism between each component, and further make the obtained film have antibacterial activity and other properties such as transparency and mechanical properties etc., there are still many difficulties

Method used

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  • Antibacterial film as well as preparation method and application thereof
  • Antibacterial film as well as preparation method and application thereof
  • Antibacterial film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] At room temperature, 2 parts by weight of low-ester pectin and 5 parts by weight of polyvinyl alcohol (type 1799) are formulated into an aqueous solution, and then 1 part by weight of glycerin, 1 part by weight of sorbitol and 1 part by weight of tannic acid are added to form a film-forming solution. The total weight is 100 parts, and the prepared film-forming solution is added dropwise on the polypropylene substrate, and baked at 60°C for 12 hours until the solution is dried to obtain the antibacterial film. It is a light yellow transparent film, which is recorded as TA1%. The scanning electron microscope results of the samples are as follows figure 1 shown by figure 1 It can be seen that after tannic acid is added in the film-forming liquid system, gel balls are formed with pectin and polyvinyl alcohol. The diameter of the gel balls is in the range of 4-10 μm, and the antibacterial film is formed by the gel balls. Its thickness is about 0.12mm.

Embodiment 2

[0033] According to the same method of embodiment 1, only the quality of tannic acid is improved to 2 parts by weight, and oven dry promptly obtains described antibacterial film, is light yellow transparent film, is recorded as TA2%. The scanning electron microscope results of the samples are as follows figure 2 shown by figure 2 It can be seen that after tannic acid is added in the film-forming liquid system, it forms gel balls with pectin and polyvinyl alcohol. The diameter of the gel balls is in the range of 4-10 μm, and the antibacterial film is formed by the gel balls. About 0.12mm.

Embodiment 3

[0035] According to the same method of embodiment 1, only the quality of tannic acid is improved to 3 parts by weight, and oven dry promptly obtains described antibacterial film, is light yellow transparent film, is recorded as TA3%. The scanning electron microscope results of the samples are as follows image 3 shown by image 3 It can be seen that after tannic acid is added in the film-forming liquid system, it forms gel balls with pectin and polyvinyl alcohol. The diameter of the gel balls is in the range of 4-10 μm, and the antibacterial film is formed by the gel balls. About 0.12mm.

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Abstract

The invention belongs to the technical field of film preparation, and particularly relates to an antibacterial film and a preparation method thereof. Wherein the antibacterial film is mainly preparedfrom the following components in parts by weight: 0.5 to 3.5 parts of pectin, 2 to 8 parts of polyvinyl alcohol, 0.5 to 1.5 parts of glycerol, 0.5 to 1.5 parts of sorbitol, 0.5 to 4.5 parts of tannicacid and water; wherein the total weight part of the components and the water is 100. According to the antibacterial film provided by the invention, a natural raw material tannic acid is used as an antibacterial agent, and the prepared film has excellent antibacterial property. In addition, the film also has good mechanical properties (such as relatively high tensile strength and elongation at break), and also has certain water solubility and water content; finally, the film also has proper transmittance, so that the film can be better applied to food preservation. Moreover, the antibacterialfilm is simple in preparation method and wide in raw material source, so that the antibacterial film is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of film preparation, and in particular relates to an antibacterial film and its preparation method and application. Background technique [0002] With the improvement of consumers' requirements for food preservation period and the enhancement of environmental awareness, antibacterial films made of natural biological materials have gradually become a research hotspot. Based on natural edible substances that can be absorbed and digested by the human body (such as protein, polysaccharide, cellulose and its derivatives, etc.), supplemented with additives with antibacterial activity, the porous network is made through the interaction between different molecules. The thin film of the structure has good antibacterial performance and degradation performance, so it is widely used. [0003] There are a large number of natural antibacterial substances in nature, including enzymes such as lactoperoxidase and lysozyme, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L5/06C08K5/053C08K5/1545C08J5/18
CPCC08J5/18C08J2329/04C08J2405/06C08K5/053C08K5/1545
Inventor 曹涵雪徐坚赵宁
Owner INST OF CHEM CHINESE ACAD OF SCI
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