Preparation method and product of chitosan antibacterial film

A chitosan and product technology, applied in the field of preparation of chitosan antibacterial film, can solve problems such as environmental pollution and white pollution, and achieve the effects of good antibacterial effect, low dissolution temperature and high film strength

Inactive Publication Date: 2018-06-12
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among the currently commonly used food packaging materials, petroleum-based polymer materials dominate, but they pollute the environment, which causes white pollution problems.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0019] The preparation method of the chitosan antibacterial film of the present invention comprises the steps: chitosan is impregnated with tartaric acid, then washed with dehydrated alcohol; tartaric acid is mixed with 1-ethyl-3 methylimidazole acetate, and Add the chitosan obtained after washing, then add chitinase, and then cool down until the coating solution is obtained; the obtained coating solution is scraped off, placed in a solvent for phase transfer to form a film, and the chitosan is obtained after drying. biofilm.

[0020] The action mechanism of each substance used in the present invention will be described in detail below.

[0021] Tartaric acid and 1-ethyl-3 methylimidazole acetate can dissolve chitosan respectively, but it is difficult for 1-ethyl-3 methylimidazole acetate to dissolve chitosan, requiring high temperature and long time (about 6h) , and the dissolved concentration is relatively low, the highest is about 3%. However, tartaric acid dissolves chit...

Embodiment 1

[0026] Dissolve 0.49g of tartaric acid in 40ml of water, add 0.5g of chitosan, heat up to 60°C, pre-soak for 10 minutes, then wash with absolute ethanol three times, and suction filter for later use;

[0027] Dissolve 0.4g of tartaric acid in 40ml of water, mix it with 3g of 1-ethyl-3-methylimidazole acetate, add pretreated chitosan, add chitinase, heat up to 50°C, at 300r / min Stir at a high speed for 5 minutes, the chitosan can be completely dissolved, then cool down to room temperature to form a coating solution with a viscosity of 300mPa·s;

[0028] Scrape the coating liquid on a flat plate to control the thickness of the film to 0.05mm. Then place in glycerin to exchange solvent, dry for 8 hours after film formation to obtain chitosan antibacterial film material.

Embodiment 2

[0030] Dissolve 0.61g of tartaric acid in 40ml of water, add 0.5g of chitosan, heat up to 70°C, pre-soak for 10 minutes, then wash with absolute ethanol three times, and suction filter for later use;

[0031] Dissolve 1 g of tartaric acid in 40 ml of water, mix it with 3 g of 1-ethyl-3 methylimidazole acetate, add pretreated chitosan, add chitinase, heat up to 60 ° C, at 400 r / min Stir at high speed for 10 minutes, the chitosan can be completely dissolved, and then cool down to room temperature to form a coating solution with a viscosity of 400mPa·s;

[0032] Scrape the coating liquid on a flat plate to control the thickness of the film to 0.05mm. Then place in ethanol to exchange the solvent, and dry for 8 hours after film formation to obtain the chitosan antibacterial film material.

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Abstract

The invention relates to the field of food packaging, in particular to a preparation method and product of a chitosan antibacterial film. The preparation method of the chitosan antibacterial film, provided by the invention, comprises the following steps: dipping the chitosan with tartaric acid and then washing with absolute ethyl alcohol; mixing the tartaric acid with 1-ethyl-3methyl imidazole acetate series and adding the washed chitosan; then adding chitinase and cooling the temperature until coating liquid is obtained; performing strickling on the obtained coating liquid and putting into asolvent for carrying out phase transfer to obtain a film and drying to obtain the chitosan antibacterial film. The obtained chitosan antibacterial film disclosed by the invention has good antibacterial effects and high film strength.

Description

technical field [0001] The invention relates to the field of packaging, in particular to a preparation method of a chitosan antibacterial film and a product thereof. Background technique [0002] With the rapid development of the economy, food safety issues have attracted global attention and become a topic closely related to our lives. Fresh food will rot and deteriorate in contact with microorganisms in the environment. It is difficult to store food for a long time. Only the use of materials with antibacterial properties can prolong the storage time of food. [0003] Among the currently commonly used food packaging materials, petroleum-based polymer materials dominate, but they pollute the environment, which causes white pollution problems. Especially with the continuous consumption of petroleum-based polymer materials such as polyethylene and polyamide, human society is facing unprecedented energy and environmental crises. In addition, polymer plastics are not easy to de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L5/08
CPCC08J5/18C08J2305/08
Inventor 高珊珊崔鲁青宋晓明陈夫山刘金岭黄连青
Owner QINGDAO UNIV OF SCI & TECH
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