Epsilon-polylysine and polyvinyl alcohol composite biological antibacterial film and its preparation method

A technology of polylysine and polyvinyl alcohol is applied in the field of preparation of ε-polylysine polyvinyl alcohol composite biological antibacterial film, which can solve the problem of no research on ε-polylysine polyvinyl alcohol composite preparation of antibacterial film, etc. question

Active Publication Date: 2012-06-13
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned patent documents mainly focus on the preparation of polyvinyl alcohol film, but none of them studied the compound preparation of ε-polylysine polyvinyl alcohol to prepare antibacterial film, which is essentially different from this patent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A preparation method of ε-polylysine polyvinyl alcohol biocomposite film, the steps are as follows:

[0015] Connect the water bath, electric stirrer and three-neck flask; add tap water to the water bath, put the thermometer into the water bath, turn on the water bath at 20°C; add 100ml of distilled water to the three-necked flask; add 1g of glycerin and 0.25g of ethylene glycol , turn on the electric stirrer and stir the solution evenly; add 0.625g of ε-polylysine, stir evenly; add 2.875g of polyvinyl alcohol to swell at 20°C for 1.5h, and keep warm at 95°C for 3h; use a measuring cylinder to measure 5ml of The molten liquid was dried in a petri dish at 25°C to form a film.

[0016] The control was the treatment without adding ε-polylysine, other conditions were consistent with Example 1, and the antibacterial rate of ε-polylysine polyvinyl alcohol biocomposite film prepared in Example 1 was 95.0%.

Embodiment 2

[0018] A preparation method of ε-polylysine polyvinyl alcohol biocomposite film, the steps are as follows:

[0019] Connect the water bath, electric stirrer and three-neck flask; add tap water to the water bath, put the thermometer into the water bath, turn on the water bath at 20°C; add 100ml of distilled water to the three-necked flask; add 1g of glycerin and 0.25g of ethylene glycol , turn on the electric stirrer and stir the solution evenly; add 1.25g of ε-polylysine, stir evenly; add 2.875g of polyvinyl alcohol to swell at 20°C for 1.5h, keep warm at 95°C for 3h; measure 5ml of The molten liquid was dried in a petri dish at 25°C to form a film.

[0020] The control was the treatment without adding ε-polylysine, other conditions were consistent with Example 2, and the antibacterial rate of ε-polylysine polyvinyl alcohol biocomposite film prepared in Example 2 was 95.6%.

Embodiment 3

[0022] A preparation method of ε-polylysine polyvinyl alcohol biocomposite film, the steps are as follows:

[0023] Connect the water bath, electric stirrer and three-necked flask; add tap water to the water bath, put the thermometer into the water bath, turn on the water bath at 20°C; add 100ml of distilled water to the three-necked flask; add 0.75g of glycerin and 0.5g of ethylene glycol Alcohol, turn on the electric stirrer and stir the solution evenly; add 0.625g of ε-polylysine, stir evenly; add 2.875g of polyvinyl alcohol to swell at 20°C for 1.5h, keep warm at 95°C for 3h; measure 5ml with a graduated cylinder The molten solution was dried in a petri dish at 50°C to form a film.

[0024] The control was the treatment without adding ε-polylysine, other conditions were consistent with Example 3, and the antibacterial rate of ε-polylysine polyvinyl alcohol biocomposite film prepared in Example 3 was 95.4%.

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Abstract

The invention relates to a production method of an epsilon-polylysine and polyvinyl alcohol composite biological antibacterial film. One or two components selected from glycerol and ethylene glycol are taken as a compound plasticizer and the epsilon-polylysine and polyvinyl alcohol composite polymer film is prepared by a melt blending method. The addition of epsilon-polylysine endows the film with good antibacterial activity and the film can be used as a packaging material and an agricultural film.

Description

technical field [0001] The invention belongs to the field of biochemical industry, and relates to a preparation method of an ε-polylysine polyvinyl alcohol composite biological antibacterial film. Background technique [0002] ε-polylysine (ε-PL) is a lysine homopolymer produced by microorganisms, which is composed of lysine residues linked by α-carboxyl and ε-amino groups. In 1977, Shima and Sakai first discovered this amino acid polymer in the fermentation serum of Streptomyces albulus NBRC 14147 strain. ε-polylysine is a polycationic polypeptide that is safe and non-toxic to the human body. It can inhibit Gram-negative bacteria, Gram-positive bacteria, fungi and even some viruses, and has a wide antibacterial spectrum. Since the safety of ε-PL was proved by mouse experiments, it has been widely used as a natural food preservative in Japan, South Korea, the United States and other countries. [0003] Polyvinyl alcohol has unique strong adhesion, film flexibility and smoo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L29/04C08L77/02C08K5/053
Inventor 谭之磊贾士儒戴玉杰乔长晟钟成贾原媛韩培培姚芳莲夏苗苗
Owner TIANJIN UNIV OF SCI & TECH
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