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Composited sodium alga acid antibacterial film and application thereof in preservation of livestock meat carcass

A sodium alginate and compound antibacterial technology, which is applied in the direction of preserving meat/fish with chemicals and preserving meat/fish with a protective coating

Inactive Publication Date: 2013-04-24
NORTHEAST AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] And take sodium alginate as base material, add antiseptic to form edible antimicrobial film, and the research of the application in chilled meat fresh-keeping has not been seen in the report

Method used

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  • Composited sodium alga acid antibacterial film and application thereof in preservation of livestock meat carcass
  • Composited sodium alga acid antibacterial film and application thereof in preservation of livestock meat carcass
  • Composited sodium alga acid antibacterial film and application thereof in preservation of livestock meat carcass

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specific Embodiment approach 1

[0019] Specific embodiment one: In this embodiment, sodium alginate is used as the film-forming base material, sodium carboxymethyl cellulose is the raw material of the blended film, and plasticizer glycerin and preservative potassium sorbate are added, and the transparency of the film is measured , thickness, mechanical properties and other indicators, the optimal composition of the composite antibacterial film is determined as:

[0020] (1) Sodium alginate film-forming solution:

[0021] ① Determination of the concentration of sodium alginate: Dissolve 1, 2, 3, 4, and 5 g of sodium alginate in distilled water, and stir with an electric stirrer in a water bath at 60°C until fully swollen to make a concentration of 0.5 g / mL and 1 g / mL, 1.5g / mL, 2g / mL, 2.5g / mL film-forming solution, according to the thickness of the film, transparency, water absorption, water vapor transmission coefficient, tensile strength, elongation at break and other indicators, screening The most suitabl...

specific Embodiment approach 2

[0028] Specific embodiment two: the difference between this embodiment and specific embodiment one is that in the composite film-forming solution of sodium alginate and sodium carboxymethyl cellulose, the sodium alginate film-forming solution and sodium carboxymethyl cellulose solution The volume ratios are 10:0, 9:1, 8:2, 7:3, 6:4, 5:5, respectively.

specific Embodiment approach 3

[0029] Specific Embodiment Three: In this embodiment, the technical solution of the present invention will be further explained in conjunction with the accompanying drawings.

[0030] 1. Preparation of sodium alginate edible film

[0031] 1. Effect of sodium alginate concentration on membrane properties

[0032] Table 1 Effect of sodium alginate concentration on membrane properties

[0033]

[0034] It can be seen from Table 1 that as the concentration of sodium alginate film-forming solution increases, the thickness of the film increases continuously, and the light transmittance of the film decreases continuously, and the difference is significant (p<0.05). When the concentration of the sodium alginate film-forming solution is 0.5g / mL, the film-forming solution is thin and the film formed after drying is thin and difficult to form a complete film, but the transparency reaches 96%. When the concentration increased to 2g / mL, the film liquid became viscous, yellow in color,...

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Abstract

A composited sodium alga acid antibacterial film and an application thereof in the preservation of livestock meat carcass relate to an antibacterial film and an application of the antibacterial film. The composited sodium alga acid antibacterial film is prepared according to the following steps: dissolving sodium alga acid in distilled water, adding glycerol, and mixing uniformly to obtain a sodium alga acid film formation solution; adding sodium carboxymethylcellulose and mixing uniformly to obtain a composited film formation solution; and adding potassium sorbate and mixing uniformly to obtain a composited antibacterial film formation solution. The composited sodium alga acid antibacterial film is applied to the preservation of the livestock meat carcass, as a result, the shelf life of cooled beef is prolonged by 6 days, and at the moment, the total bacterial count is 6.55 cfu / g, the TBV-N value is 25.7 mg / 100g, the drip loss is 9.1%, the color value is 25.7 and the pH value is 6.57. The thickness of the composited antibacterial film is 45-47 micrometers, the transparency is 79-81%, the water absorption is 8.21-8.53%, the tensile strength is 1.45-1.48 kg / cm<2>, the elongation at break is 19.98-23.21%, and the water vapor permeability is 8.89-9.06%.

Description

technical field [0001] The invention relates to an antibacterial film and its application, in particular to a sodium alginate composite antibacterial film and its application in preservation of livestock carcasses. Background technique [0002] Sodium alginate is a linear polymer polysaccharide extracted from brown algae and composed of uronic acid monomers. It is widely used in the fresh-keeping of meat food because of its good film-forming properties, biodegradability and biocompatibility. . However, the single sodium alginate film is brittle, has poor water resistance, and has no obvious antibacterial effect, which limits its application in food preservation. In order to solve this problem, many scholars have studied and prepared composite blend membranes. Blended film is an effective method to improve the performance of edible film materials. It not only improves the physical and chemical properties of a single sodium alginate film, but also improves the antibacterial,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B4/10A23B4/20
Inventor 孔保华夏秀芳李沛军王瑞陈倩
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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