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Composite chitosan coating film for poultry egg preservation as well as preparation method and application thereof

A technology of chitosan and poultry eggs, which is applied in the direction of application, coating protective layer to preserve eggs, and food ingredients as antimicrobial preservation, etc. It can solve the problems of poor antibacterial durability, discounted antibacterial effect, and single structure of antibacterial coatings. Achieve the effect of not easy clustering, easy nucleation and uniform reaction

Active Publication Date: 2020-11-10
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nano-silver is easy to aggregate, has a single structure, and is easily destroyed.
The antibacterial coating film prepared only with nano-silver has poor antibacterial durability, and the antibacterial effect will be greatly reduced after repeated washing several times
However, there is no research report on the preparation of nano-silver modified titanium dioxide composite chitosan coating film and its antibacterial and fresh-keeping properties.

Method used

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  • Composite chitosan coating film for poultry egg preservation as well as preparation method and application thereof
  • Composite chitosan coating film for poultry egg preservation as well as preparation method and application thereof
  • Composite chitosan coating film for poultry egg preservation as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The preparation method of the composite chitosan coating film that is used for poultry egg fresh-keeping of the present embodiment, comprises the steps:

[0060] Step 1: Preparation of nano-silver sol

[0061] Take analytically pure glacial acetic acid and sulfinic acid and mix them in equal volumes to obtain a compound acid solution.

[0062] Take 50mL of AgNO with a concentration of 0.5mM 3 solution and 50 mL of the above compound acid solution with a concentration of 0.1 mM, under vigorous stirring at a speed of 100 r / min, 2 mL of freshly prepared ice NaBH with a concentration of 1 mM was added dropwise. 4 solution, and reacted for 60s to obtain nano-silver sol.

[0063] Step 2: Preparation of nano-silver-titanium dioxide composite colloid

[0064] At room temperature, 3 mL of tetrabutyl titanate was dissolved in 20 mL of absolute ethanol to obtain a tetrabutyl titanate solution.

[0065] The above tetrabutyl titanate solution was slowly added dropwise to 30 mL o...

Embodiment 2

[0075] The preparation method of the composite chitosan coating film that is used for poultry egg fresh-keeping of the present embodiment, comprises the steps:

[0076] Step 1: Preparation of nano-silver sol

[0077] Take analytically pure sulfinic acid, thiocarboxylic acid and formic acid and mix them in equal volumes to obtain a compound acid solution.

[0078] Take 50mL of AgNO with a concentration of 0.6mM 3 Solution and 50mL of the above compound acid solution with a concentration of 0.2mM, under vigorous stirring at a speed of 250r / min, add 2mL-5mL of freshly prepared ice NaBH with a concentration of 1.1mM dropwise 4 solution, and reacted for 120s to obtain nano-silver sol.

[0079] Step 2: Preparation of nano-silver-titanium dioxide composite colloid

[0080] At room temperature, 5 mL of tetrabutyl titanate was dissolved in 30 mL of absolute ethanol to obtain a tetrabutyl titanate solution.

[0081] The above-mentioned tetrabutyl titanate solution was slowly added d...

Embodiment 3

[0091] The preparation method of the composite chitosan coating film that is used for poultry egg fresh-keeping of the present embodiment, comprises the steps:

[0092] Step 1: Preparation of nano-silver sol

[0093] Take analytically pure thiocarboxylic acid and formic acid and mix them in equal volumes to obtain a compound acid solution.

[0094] Take 50mL of AgNO with a concentration of 0.8mM 3 solution and 50 mL of the above compound acid solution with a concentration of 0.3 mM, under vigorous stirring at a speed of 500 r / min, 5 mL of freshly prepared ice NaBH with a concentration of 1.2 mM was added dropwise. 4 solution, and reacted for 180s to obtain nano-silver sol.

[0095] Step 2: Preparation of nano-silver-titanium dioxide composite colloid

[0096] At room temperature, 8 mL of tetrabutyl titanate was dissolved in 40 mL of absolute ethanol to obtain a tetrabutyl titanate solution.

[0097] The above tetrabutyl titanate solution was slowly added dropwise to 50 mL ...

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Abstract

The invention discloses a composite chitosan coating film for poultry egg preservation as well as a preparation method and application thereof, and belongs to the technical field of coating film preservation. The preparation method of the composite chitosan coating film for poultry egg preservation comprises the following steps of: 1, preparing nano-silver sol; 2, preparing a nanosilver-titanium dioxide composite colloid; 3, preparing a chitosan coating film; and 4, preparing the composite chitosan coating film for poultry egg preservation. The invention further discloses the composite chitosan coating film for poultry egg preservation, which is obtained by adopting the preparation method, and the application of the composite chitosan coating film. The composite chitosan coating film obtained by adopting the preparation method can be used for performing cleaning and degerming, preventing invasion of bacteria and oxygen, preventing loss of water and CO2 in eggs, maintaining the pH valueof protein to be less than 7, inhibiting respiration in the eggs, preventing growth and propagation of aerobic bacteria, delaying egg white hydration, inhibiting yolk dispersion and prolonging the shelf life of fresh poultry eggs.

Description

technical field [0001] The invention relates to a composite chitosan coating film for poultry and egg preservation, a preparation method and application thereof, and belongs to the technical field of coating film preservation. Background technique [0002] The eggshell of the egg has a good protective effect on the contents of the egg. During storage, the pores of the eggshell are also microbial invasion, and the CO inside the egg 2 and channels for the continuous loss of moisture. In addition, during transportation and storage, eggshells are prone to tiny cracks due to their brittleness, which accelerates the decline of egg quality. [0003] At present, the preservation methods of eggs include refrigeration method, modified atmosphere method, irradiation method and film coating method. The coating method has received widespread attention due to its low cost, convenient operation, remarkable and long-lasting effect. Chitosan is a kind of basic polysaccharide polymer with ...

Claims

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Application Information

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IPC IPC(8): A23B5/06
CPCA23B5/06A23V2002/00A23V2200/10A23V2250/511A23V2250/1562
Inventor 汪远昊王尔特冀亚雄刘光焰沈陶
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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