Preparation method of water-blocking oxygen-blocking edible film

A technology of water blocking and oxygen blocking, edible film, applied in the direction of flexible covering, packaging, wrapping paper, etc., to achieve good elongation performance, prolong shelf life, and increase the effect of elongation

Active Publication Date: 2014-12-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the polysaccharide film does not h

Method used

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  • Preparation method of water-blocking oxygen-blocking edible film
  • Preparation method of water-blocking oxygen-blocking edible film
  • Preparation method of water-blocking oxygen-blocking edible film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The first step prepares the acetic acid solution that the mass concentration of acetic acid is 1%, adds the chitosan that is equivalent to 1% and 0.05% of the mass of acetic acid solution respectively to acetic acid solution, fully hydrates, respectively obtains the first chitosan acetic acid solution and the second Dichitosan acetate solution. Adding 1% chitosan acetic acid solution equivalent to the quality of acetic acid solution is used as a membrane matrix, which is the first polysaccharide acetic acid solution; adding 0.05% chitosan acetic acid solution equivalent to the quality of acetic acid solution is used to prepare Pickering The emulsion is the second polysaccharide acetate solution.

[0028] The second step is to prepare an ethanol solution with an ethanol mass concentration of 70%, adding zein equivalent to 2.5% of the mass of the ethanol solution into the ethanol solution, and fully dissolving to obtain a zein ethanol solution.

[0029] The third step is...

Embodiment 2

[0038] The first step prepares the acetic acid solution that acetic acid mass concentration is 1%, will be equivalent to the chitosan of acetic acid solution quality 0.8% and 0.06% respectively to add acetic acid solution, fully hydration, obtain the first chitosan acetic acid solution and the second respectively chitosan acetate solution. The acetic acid solution of adding 1% chitosan equivalent to the mass of the acetic acid solution is prepared as a film matrix, which is the first polysaccharide acetic acid solution; the acetic acid solution adding 0.05% chitosan equivalent to the mass of the acetic acid solution is used to prepare Pickering emulsion , is the second chitosan acetate solution.

[0039] The second step is to prepare an ethanol solution with an ethanol mass concentration of 75%, adding zein equivalent to 5.0% of the mass of the ethanol solution into the ethanol solution, and fully dissolving to obtain a zein ethanol solution.

[0040]The third step is to take...

Embodiment 3

[0049] The first step prepares the acetic acid solution that the mass concentration of acetic acid is 1%, and the chitosan that is equivalent to 1.2% and 0.05% of the mass of acetic acid solution is added into the acetic acid solution respectively, fully hydrated, obtain the first chitosan acetic acid solution and the second respectively Dichitosan acetate solution. The 1.2% chitosan acetic acid solution that is equivalent to the quality of the acetic acid solution is used as the membrane matrix, which is the first polysaccharide acetic acid solution; the acetic acid solution that adds 0.05% chitosan equivalent to the quality of the acetic acid solution is used to prepare The emulsion is the second polysaccharide acetate solution.

[0050] The second step is to prepare an ethanol solution with an ethanol mass concentration of 75%, adding zein equivalent to 5.0% of the mass of the ethanol solution into the ethanol solution, and fully dissolving to obtain a zein ethanol solution...

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PUM

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Abstract

The invention discloses a preparation method of a water-blocking oxygen-blocking edible film. The method comprises the following steps: adding chitosan which accounts for 0.5-2.0% and 0.03-0.06% of the mass of an acetate solution into the acetate solution respectively, sufficiently hydrating the mixtures to obtain a first chitosan acetate solution and a second chitosan acetate solution; adding corn alcohol soluble protein into an ethanol solution to be sufficiently dissolved to obtain a corn alcohol soluble protein ethanol solution; adding the second chitosan acetate solution into the corn alcohol soluble protein ethanol solution, carrying out water-bath rotary evaporation on the obtained material until the mass of the material is 40%-80% of the original mass, centrifuging the solution and taking liquid supernatant; adding corn oil into the liquid supernatant, shearing and homogenizing the mixture to prepare Pickering emulsion; adding the Pickering emulsion into the first chitosan acetate solution, adding glycerol into the solution, ultrasonically treating and the drying the mixture to obtain the water-blocking oxygen-blocking edible film material. According to the invention, in comparison with a chitosan film, the water-blocking oxygen-blocking capacity of the water-blocking oxygen-blocking edible film is greatly improved, and the water vapor blocking cavity of the water-blocking oxygen-blocking edible film is also greatly improved.

Description

technical field [0001] The invention relates to an edible film material, in particular to a preparation method of an edible film material that blocks water and oxygen. technical background [0002] In recent years, green packaging has become a hot spot in product development and laboratory research. Due to the intramolecular and intermolecular hydrogen bonds of proteins and polysaccharides, the formed film has good mechanical properties and gas barrier properties (oxygen, nitrogen, carbon dioxide), but water molecules can easily open the hydrogen bonds, thereby forming a three-dimensional membrane in the polysaccharide or protein. Through the structure, so the water resistance performance is poor. Conversely, hydrophobic greases are better at blocking water, but have poorer structural properties. Composite films of oils, proteins, and polysaccharides, which combine the good structural properties of protein or polysaccharide colloids with the water-blocking properties of oi...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08J3/09C08L5/08C08L89/00C08L91/00C08K5/053B65D65/46
Inventor 尹寿伟石伟健唐传核杨晓泉
Owner SOUTH CHINA UNIV OF TECH
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