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A kind of preparation method of hop extract-gelatin-chitosan antibacterial film

A technology of chitosan film and hops, applied in flexible coverings, packaging, wrapping paper, etc., can solve the problems of high dosage and unclear mechanism of antibacterial effect, and achieve easy production process, convenient storage and transportation , Eating safe and reliable effect

Inactive Publication Date: 2021-10-08
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method overcomes the defects that most of the natural antibacterial agents used in the existing methods are mixed extracts, the mechanism of antibacterial effect is not clear, and the addition amount is relatively high, and it provides a natural source compound with strong antibacterial activity as an antibacterial agent. The prepared film has better biocompatibility and antibacterial activity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 220 mL of water in a 500 mL beaker, add 10 g of gelatin, stir at 60 °C until dissolved, cool to room temperature, add 1.75 g of glycerin, and stir at 30 °C for 1 h until the solution is clear and transparent; take another 220 mL of water in a 500 mL Add 4.5 mL of 36% acetic acid to the beaker, mix well, then add 4 g of chitosan, stir at 70 °C until completely dissolved, cool to room temperature, add 4.5 g of glycerin, and stir at 30 °C for 1 h. Mix the gelatin film solution prepared above with the chitosan film solution, stir at 30 °C for 1.5 h, then add 7 mL of ethanol solution with a mass concentration of 100 mg / mL hops extract that has been pre-configured under continuous stirring, to make the film solution The concentration of the hop extract in the medium was 1.5mg / mL, and the stirring was continued at 30°C for 1 h, left to stand for 24 h, and then ultrasonically degassed for 2 h to obtain the prepared hop extract-gelatin-chitosan antibacterial film film liquid...

Embodiment 2

[0030] Take 220 mL of water in a 500 mL beaker, add 10 g of gelatin, stir at 60 °C until dissolved, cool to room temperature, add 1.75 g of glycerin, and stir at 30 °C for 1 h until the solution is clear and transparent; take another 220 mL of water in a 500 mL Add 4.5 mL of 36% acetic acid to the beaker, mix well, then add 4 g of chitosan, stir at 70 °C until completely dissolved, cool to room temperature, add 4.5 g of glycerin, and stir at 30 °C for 1 h. Mix the gelatin film solution prepared above with the chitosan film solution, stir at 30 °C for 1.5 h, then add 7 mL of ethanol solution with a mass concentration of 100 mg / mL hops extract that has been pre-configured under continuous stirring, to make the film solution The concentration of the hop extract in the medium was 1.5mg / mL, and the stirring was continued at 30°C for 1 h, left to stand for 24 h, and then ultrasonically degassed for 2 h to obtain the prepared hop extract-gelatin-chitosan antibacterial film film liquid...

Embodiment 3

[0032] Take 140 mL of water in a 500 mL beaker, add 5 g of gelatin, stir at 60 °C until dissolved, cool to room temperature, add 1.2 g of glycerin, and stir at 30 °C for 1 h until the solution is clear and transparent; take another 140 mL of water in a 500 mL In the beaker, add 2 mL of 36% acetic acid, mix well, then add 3.8 g of chitosan, stir at 70 °C until completely dissolved, cool to room temperature, add 2.5 g of glycerin, and stir at 30 °C for 1 h. Mix the gelatin film solution prepared above with the chitosan film solution, stir at 30°C for 2 h, then add 6 mL of ethanol solution with a mass concentration of 50 mg / mL hops extract that has been pre-configured under continuous stirring, to make the film The concentration of the hop extract in the solution was 1.0 mg / mL, and the stirring was continued for 1 h at 30 °C, left to stand for 24 h, and then ultrasonically degassed for 2 h to obtain the prepared hop extract-gelatin-chitosan antibacterial film liquid. The prepare...

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Abstract

The invention provides an edible hop extract-gelatin-chitosan antibacterial agent prepared from pure natural raw materials, which uses hop extract as a bacteriostatic agent, gelatin and chitosan as a composite base material, and glycerin as a plasticizer The preparation method of the membrane has a simple process, the adopted raw materials are natural and non-toxic, and the process is green and environment-friendly. The film solution of the prepared hop extract-gelatin-chitosan antibacterial film can be directly used for directly dipping the picked fruit into the film to prolong the shelf life, and can also be used for various fruits and vegetables after being prepared into a film , fresh food and bread, pastry and other food packaging.

Description

technical field [0001] The invention relates to a preparation method of a hop extract-gelatin-chitosan antibacterial film, belonging to the field of novel functional packaging materials. More specifically, the present invention provides an edible hop extract-gelatin-shell prepared from pure natural raw materials using hop extract as a bacteriostatic agent, gelatin and chitosan as a composite substrate, and glycerin as a plasticizer Preparation method and application of polysaccharide antibacterial film. Background technique [0002] The deterioration of the environment is the most severe challenge faced by human beings, and environmental protection has become one of the world's most important issues. While the development of the food packaging industry has made great contributions to economic construction, it has also brought serious environmental pollution to humans. This kind of pollution is second only to air pollution, water pollution, and ocean and lake pollution, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L89/00C08L5/08C08K5/053C08K5/00C08J5/18B65D65/46
Inventor 刘玉梅陈婷
Owner XINJIANG UNIVERSITY
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