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Preparation method of antibacterial and antioxidant food fresh-keeping film

A technology for food preservation and anti-oxidation, applied in the field of food packaging materials, can solve the problems of direct utilization of camellia oleifera meal extract, which has not been reported, and achieve the effects of low cost, high barrier performance, and widening application fields.

Active Publication Date: 2015-12-02
HUNAN ACAD OF FORESTRY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the reports in the existing patent literature are the direct extraction of polyphenols and tea saponin in the camellia oleifera meal to add to various materials, and the direct utilization of the camellia oleifera meal extract has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The present embodiment provides a kind of preparation method of food preservation film, concrete steps are as follows:

[0025] (1) Take 100g of camellia oleifera meal that has been crushed and passed 20 meshes, put it in a beaker, add 500ml of 70% ethanol (volume fraction, the same below), leaching in a 90°C water bath for 120min with constant temperature ultrasonic waves, and filter. Add 500ml of 70% ethanol to the filter residue, leaching in a 90°C water bath for 120 minutes with constant temperature ultrasonic waves, filtering, repeating twice, and combining the filtrates from the three times of leaching into the extract.

[0026] (2) Mix the extract with activated clay and stir in a water bath at 60°C for 60 minutes at a constant temperature, centrifuge and filter to obtain a decolorized filtrate, then use a rotary evaporator to concentrate under reduced pressure to 1 / 5 of the original volume at 60°C, and then vacuum-dry to obtain the oil tea meal extract .

[002...

Embodiment 2

[0031] The present embodiment provides a kind of preparation method of food preservation film, concrete steps are as follows:

[0032] (1) Take 100g of camellia oleifera meal that has been crushed and passed through 20 meshes, put it in a beaker, add 500ml of 60% ethanol, leaching for 120min with constant temperature ultrasonic in a water bath at 85°C, and filter. Then add 500ml of 60% ethanol to the filter residue, leaching with constant temperature ultrasonic wave in 85°C water bath for 120min, filter, repeat twice, and combine the filtrates from the three times of leaching into the extract.

[0033] (2) Mix the extract with activated clay and stir in a water bath at 60°C for 60 minutes at a constant temperature, centrifuge and filter to obtain a decolorized filtrate, then use a rotary evaporator to concentrate under reduced pressure to 1 / 5 of the original volume at 60°C, and then vacuum-dry to obtain the oil tea meal extract .

[0034] (3) Add edible gelatin and camellia o...

Embodiment 3

[0038] The present embodiment provides a kind of preparation method of food preservation film, concrete steps are as follows:

[0039] (1) Take 100g of camellia oleifera meal that has been crushed and passed through 20 meshes, put it in a beaker, add 500ml of 60% ethanol, leaching in a 95°C water bath with constant temperature ultrasonic for 120min, and filter. Add 500ml of 60% ethanol to the filter residue, leaching in a 95°C water bath for 120 minutes with constant temperature ultrasonic waves, filtering, repeating twice, and combining the filtrates from the three extractions into the extract.

[0040] (2) Mix the extract with activated clay and stir in a water bath at 60°C for 60 minutes at a constant temperature, centrifuge and filter to obtain a decolorized filtrate, then use a rotary evaporator to concentrate under reduced pressure to 1 / 5 of the original volume at 60°C, and then vacuum-dry to obtain the oil tea meal extract .

[0041] (3) Add edible gelatin and camellia...

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Abstract

The invention discloses a preparation method of an antibacterial and antioxidant food fresh-keeping film. The method comprises the following steps that 1, oil-tea meal is extracted and filtered by an ethanol solution at the temperature of 80-95 DEG C to obtain an extraction solution; 2, the extraction solution is decolored, a solvent is evaporated to concentrate the extraction solution, and an oil-tea meal extract is obtained; 3, edible gelatine and the oil-tea meal extract are dissolved in water to obtain a water solution, Pulullan is dissolved in lactic acid to obtain a lactic acid solution, and the water solution and the lactic acid solution are mixed and emulsified to obtain a film solution, wherein in the film solution, the concentration of the oil-tea meal extract is 10-20wt%, the concentration of the edible gelatine is 0.3-0.8wt%, the concentration of the lactic acid is 1-2wt%, and the concentration of the Pulullan is 1-2wt%; 4, the film solution obtained in the step 3 is homogenized and refined, and then degassing, tape casting, drying and film uncovering are performed on the film solution, so that the food fresh-keeping film is obtained. The fresh-keeping film can utilize oil-tea meal and also has the antibacterial and antioxidant performance.

Description

technical field [0001] The invention relates to a preparation method of an antibacterial and antioxidative food preservation film, which belongs to the technical field of food packaging materials. Background technique [0002] With the increasing waste of resources caused by plastic packaging materials and the environmental pollution caused by waste, people have put forward higher requirements for the packaging of commodities, especially for food and medicine. Environmentally friendly biopolymer materials made of natural polymers are gaining more and more attention. Among them, edible film has become a hotspot in the fields of food, medicine and packaging due to its wide source of raw materials, edible and non-polluting advantages, and has achieved certain results. [0003] The materials used to prepare food preservation films mainly include: lipids, proteins and polysaccharides. Among them, materials such as protein and starch are prone to breed microorganisms, and some a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/00C08L89/00C08J5/18
Inventor 周波马力陈永忠彭邵锋陈家法钟海雁蒋海明张燕曾文立廖晨曦
Owner HUNAN ACAD OF FORESTRY
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