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Composite antibacterial film and preparation method thereof

A compound antibacterial and film liquid technology, applied in the field of food preservation, can solve the problems of no antibacterial effect and limited shelf life extension effect, and achieve good antibacterial effect, good antibacterial effect, and enhanced antibacterial effect

Pending Publication Date: 2020-05-08
WUHAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, pure polyvinyl alcohol film has no antibacterial effect, and when it is used for fresh meat preservation, it has a limited effect on extending the shelf life

Method used

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  • Composite antibacterial film and preparation method thereof
  • Composite antibacterial film and preparation method thereof
  • Composite antibacterial film and preparation method thereof

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preparation example Construction

[0029] The present invention also proposes a method for preparing a composite antibacterial film, which is used for preparing the above composite antibacterial film. figure 1 It is an embodiment of the preparation method of the composite antibacterial film of the present invention.

[0030] refer to figure 1 , the preparation method of composite antibacterial film comprises the following steps:

[0031] Step S10, adding polyvinyl alcohol into the water, soaking until the polyvinyl alcohol absorbs water and swells to obtain a swollen body.

[0032] In this embodiment, polyvinyl alcohol and water are mixed according to the ratio of g:mL=1-3:100, and then soaked until the polyvinyl alcohol fully absorbs water and swells. Specifically, the soaking time is 1-3 hours.

[0033] Step S20, heating and melting the swollen body, adding glycerin, stirring and mixing to form a mixed liquid.

[0034] In specific implementation, the polyvinyl alcohol particles swelled by water absorption...

Embodiment 1

[0046] Weigh 3g polyvinyl alcohol into 100mL distilled water and soak for 1.7h, then place the polyvinyl alcohol particles swollen by water absorption in a boiling water bath and heat for 30min until completely melted, add 0.5g glycerin, stir magnetically for 20min, add 1gε-polylysine Acid, magnetically stirred for 20 minutes, put into an ultrasonic instrument for defoaming for 40 minutes, and obtained a membrane solution. Spread the film solution in a film forming device, bake at 30°C for 11 hours, then raise the temperature to 50°C, bake for 4 hours, and peel off the film to obtain a polyvinyl alcohol / ε-polylysine composite antibacterial film.

Embodiment 2

[0048] Weigh 1g polyvinyl alcohol and add it to 100mL distilled water to soak for 2h, then place the water-swellable polyvinyl alcohol particles in a boiling water bath and heat for 35min until completely melted, add 1g glycerin, stir magnetically for 40min, add 2gε-polylysine, Magnetically stirred for 40 minutes, put into an ultrasonic instrument for defoaming for 33 minutes, and obtained a casting solution. Spread the film solution in a film forming device, bake at 20°C for 13 hours, then raise the temperature to 40°C, bake for 4.2 hours, and peel off the film to obtain a polyvinyl alcohol / ε-polylysine composite antibacterial film.

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Abstract

The invention discloses a composite antibacterial film and a preparation method thereof, and relates to the technical field of food preservation. The composite antibacterial film is prepared from thefollowing raw materials: polyvinyl alcohol, glycerol, water and epsilon-polylysine. The preparation method of the composite antibacterial film comprises the following steps: adding polyvinyl alcohol into water, and soaking until polyvinyl alcohol absorbs water and swells to obtain a swelled body; heating and melting the swelling body, adding glycerol, and uniformly stirring and mixing the components to form a mixed solution; adding epsilon-polylysine into the mixed solution, stirring the mixed solution, and performing a reaction to generate a membrane solution; and spreading the film liquid ina film forming device, and baking the device to form a film, thereby obtaining the composite antibacterial film. The invention aims to provide the composite antibacterial film with a good antibacterial effect so as to prolong the shelf life of food.

Description

technical field [0001] The invention relates to the technical field of food preservation, in particular to a composite antibacterial film and a preparation method thereof. Background technique [0002] With the improvement of people's living standards, fresh livestock and poultry meat has become one of the requisite foods on people's tables. Extending the shelf life of fresh meat can not only increase the commercial value of the product, but also expand the consumer market for fresh meat. [0003] Polyvinyl alcohol is a degradable and environmentally friendly plastic material, which is widely used in various fields such as medicine, agriculture, chemical industry, and food, and has attracted more and more attention in recent years. However, pure polyvinyl alcohol film has no antibacterial effect, and when it is used for fresh meat preservation, it has a limited effect on extending the shelf life. Contents of the invention [0004] The main purpose of the present inventio...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L77/04C08K5/053C08J5/18
CPCC08J5/18C08J2329/04C08J2477/04C08K5/053C08J2377/04C08J2429/04
Inventor 王宏勋杨萍萍侯温甫胥伟
Owner WUHAN POLYTECHNIC UNIVERSITY
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