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Edible composite sodium alginate antibacterial film liquid as well as preparation method and application thereof

The technology of sodium alginate and antibacterial film is applied in the field of edible composite sodium alginate antibacterial film liquid and its preparation field, which can solve the problems that the growth of microorganisms cannot be completely inhibited, the toxicity of residual substances needs to be studied, and the fresh-keeping effect is not ideal. To achieve the effect of reducing water permeability, low price and good antibacterial effect

Active Publication Date: 2015-09-30
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the storage and transportation of chilled ducks, because the refrigeration temperature cannot completely inhibit the growth of microorganisms, and the current domestic cold chain system is not scaled up, the preservation effect is not ideal
Fresh-keeping technologies for chilled duck include high-pressure preservation, radiation preservation, chemical preservation, etc. These methods are highly technical, costly, and the toxicity of residual substances needs to be studied, and the preservation effect is very unstable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] An edible compound sodium alginate antibacterial film solution, with a sodium alginate solution with a mass concentration of 2% as the film bottom liquid, adding 1% glycerin of the film bottom liquid quality, 0.3% ε-polylysine, and 0.2% Grapefruit peel nanofibers, and after adding citric acid to adjust the pH value of the solution to 5.5, mix evenly, and the preparation method specifically includes the following steps:

[0020] (1) Preparation of sodium alginate solution: Dissolve 2g of sodium alginate in 1000ml of water, stir and dissolve continuously at 60°C to prepare a sodium alginate solution with a mass concentration of 2%;

[0021] (2) Preparation of pomelo peel nanofibers: dried pomelo peel and crushed through a 200-mesh sieve, weighed a certain quality of pomelo peel powder, obtained microcrystalline fiber by acid-base high-temperature extraction method, and then hydrolyzed the microcrystalline fiber with concentrated sulfuric acid fiber, to obtain grapefruit p...

Embodiment 2

[0024] With above-mentioned embodiment 1, its difference is:

[0025] Use sodium alginate solution with a mass concentration of 1% as the membrane bottom solution, add 0.5% glycerin, 0.15% ε-polylysine, 0.15% grapefruit peel nanofibers, and add citric acid to adjust the solution After the pH value reaches 5, just mix evenly, and the specific preparation methods are as follows:

[0026] Step (1) Preparation of sodium alginate solution: Dissolve 1g of sodium alginate in 1000ml of water, stir and dissolve continuously at 50°C to prepare a sodium alginate solution with a mass concentration of 1%.

[0027]Step (2) In the preparation of grapefruit peel nanofibers: the microcrystalline fibers are added to a concentrated sulfuric acid solution with a mass concentration of 62% for a hydrolysis reaction for 35 minutes, and then sonicated for 35 minutes under the condition of a power of 300w, and then centrifuged to take the supernatant. Freeze-dried after dialysis at room temperature; ...

Embodiment 3

[0030] With above-mentioned embodiment 1, its difference is:

[0031] Taking sodium alginate solution with a mass concentration of 4% as the membrane bottom liquid, adding 1.5% glycerol, 0.5% ε-polylysine, 0.25% grapefruit peel nanofibers, and adding citric acid to adjust the solution After the pH value reaches 6, it can be mixed evenly. The specific preparation methods are as follows:

[0032] Step (1) in the preparation of sodium alginate solution: dissolve 4g of sodium alginate in 1000ml of water, and continuously stir and dissolve at 70°C to prepare a sodium alginate solution with a mass concentration of 1%;

[0033] Step (2) In the preparation of grapefruit peel nanofibers: the microcrystalline fibers are added to a concentrated sulfuric acid solution with a mass concentration of 66% for a hydrolysis reaction for 45 minutes, and then sonicated for 25 minutes under the condition of a power of 400w, and then centrifuged to take the supernatant. Freeze-dried after dialysis ...

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Abstract

The invention discloses edible composite sodium alginate antibacterial film liquid as well as a preparation method and application thereof. The edible composite sodium alginate antibacterial film liquid is characterized in that by taking a sodium alginate solution with the mass concentration of 1%-4% as a film base solution, glycerin accounting for 0.5%-1.5% of the film base solution by mass, epsilon-polylysine accounting for 0.15% -0.5% of the film base solution by mass and shaddock peel nanofiber accounting for 0.15%-0.25% of the film base solution by mass are added, citric acid is added to adjust the pH value of the solution to 5-6 and then uniform mixing is carried out; the preparation method comprises the following steps: sodium alginate solution preparation, shaddock peel nanofiber preparation and composite sodium alginate antibacterial film liquid preparation. The edible composite sodium alginate antibacterial film liquid can be used for fresh keeping of fresh-frozen ducks and has the advantages that moisture permeability of a film can be reduced, so that water loss of the duck meat is controlled and a biological antibacterial agent contained in the edible composite sodium alginate antibacterial film liquid can restrain the growing of putrefying bacteria in the fresh-frozen ducks. Therefore, color, luster and flavor of duck meat can be kept, and the shelf life of the fresh-frozen duct is prolonged.

Description

technical field [0001] The invention relates to an edible antibacterial film, in particular to an edible compound sodium alginate antibacterial film liquid and its preparation method and application. Background technique [0002] Sodium alginate is a linear polymer polysaccharide composed of uronic acid monomers extracted from kelp. In addition to being used as a thickener and stabilizer in the food industry, it has been used as artificial casings and food preservation films. Such auxiliary materials have the effect of slowing down the water loss of food and inhibiting microbial contamination, and are low in cost. They are environmentally friendly and have no toxic effect on the human body when used in food fresh-keeping packaging, and can expand the application range of marine resources in the existing market. [0003] ε-polylysine is an amino acid homopolymer produced in large quantities by microorganisms. It is a homopolymer connected by the essential amino acid L-lysine ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L3/3481
CPCA23L3/3481Y02A40/90
Inventor 潘道东汤秋冶吴振孙杨赢曹锦轩曾小群
Owner NINGBO UNIV
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