Manufacturing method of chitosan-PE double-layer bacteriostatic preservative film
A technology of chitosan film and production method, applied in chemical instruments and methods, coatings, layered products, etc., can solve problems such as hidden dangers of food safety, migration, and PE film does not have bacteriostatic and antioxidant properties, and achieves an increase in the Economic benefits, improved quality and shelf life
Inactive Publication Date: 2014-02-12
CHANGCHUN UNIV OF TECH
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Problems solved by technology
However, when applied to the packaging of oily foods, some of the small molecule processing aids (such as flexibilizers) will migrate, causing food safety hazards
In addition, a single PE film does not have the functions of antibacterial and anti-oxidation
Method used
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[0025] The preparation method of chitosan-PE double-layer antibacterial fresh-keeping film of the present invention comprises the following steps:
[0026] 1. The preparation of chitosan membrane liquid comprises the following steps:
[0027] 1.1 Prepare the following materials according to mass percentage: 1% acid-soluble chitosan, 0.5% acetic acid, 1.5% glycerin, 1.5% Span40, 0.05% oregano oil, 95.45% distilled water;
[0028] 1.2 According to the materials prepared in step 1.1, add acetic acid to distilled water to form an acetic acid solution, then fully dissolve the acid-soluble chitosan in the acetic acid solution, then add glycerin, Span40 and oregano oil, and stir to form a solution;
[0029] 1.3 Homogenize the solution obtained in step 1.2 at 8000r / min for 15min;
[0030] 1.4 The homogeneous solution obtained in step 1.3 was vacuum degassed at 0.09 MPa for 10 minutes to remove the air bubbles in the solution to obtain the chitosan film liquid;
[0031] 2. The maki...
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The invention discloses a manufacturing method of a chitosan-PE (poly ethylene) double-layer bacteriostatic preservative film, and belongs to the technical field of agricultural product preservation. The method comprises the steps that acid-soluble chitosan is dissolved in acetum fully; Span40, glycerol and origanum oil are added respectively, stirred uniformly, homogenized and subjected to the vacuum degassing to obtain a chitosan film liquid, and the chitosan filmliquid is uniformly cast on a film formation medium laid with a PE preservative film; the coating quantity is 3-4mL / cm<2>; the film formation medium coated with the chitosan film liquid is placed in an oven for drying; when the moisture content of a chitosan film reaches 8-10%, the film is uncovered to obtain the chitosan-PE double-layer bacteriostatic preservative. With the adoption of the chitosan-PE double-layer bacteriostatic preservative film, the microorganic pollution and the moisture loss of meat during processing, transportation and storage courses can be reduced; a novel effective preservative approach is provided for meat products; the quality of the meat products is improved; and the economic benefit of the meat products is increased.
Description
technical field [0001] The invention belongs to the technical field of fresh-keeping of agricultural products, and in particular relates to a preparation method of a chitosan-PE double-layer antibacterial fresh-keeping film. Background technique [0002] Chitosan is a polysaccharide organic polymer obtained by deacetylation of chitin. Chitosan has good film-forming properties, broad-spectrum antibacterial properties, biocompatibility and biodegradability, and it can be absorbed by the human body as a functional component. It is widely used in the meat industry, especially in the storage and preservation of chilled meat. application. Its disadvantages are low mechanical strength, poor water resistance, and weak gas barrier effect, so it is not suitable for use as a packaging film alone. [0003] PE film is polyethylene film, safe and non-toxic, with moderate water permeability and air permeability, which can keep the packaged products from pollution during production, proce...
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IPC IPC(8): C08J7/04C08J5/18C08L23/06C08L5/08C08K5/053B32B27/06B32B27/32B32B9/04B65D65/40
Inventor 姜燕张海悦鲍慧娟柳佳齐
Owner CHANGCHUN UNIV OF TECH