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A preparation method of an edible fresh-keeping film and an application of the film in material fresh-keeping

A technology of fresh-keeping film and chitosan, which is applied in application, food preservation, food science, etc., can solve the problems of difficult to meet people's demand for food, poor gas barrier and antibacterial properties, poor oil, water, and gas barrier effects, etc. problems, to achieve the effect of facilitating the combination of membrane molecules, improving cross-linking strength, and increasing shelf life

Inactive Publication Date: 2019-03-29
广西南宁桂尔创环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the edible films currently on the market have single functions, and it is difficult to meet people's needs for edible products.
[0003] In the prior art, the invention patent CN201610945107.2 is a preparation method of an edible food packaging film, which discloses a packaging film compounded from tung oil, pigskin collagen and chitosan. The packaging film solves the problems of moisture permeability, gas barrier The problem of poor antibacterial properties and high brittleness can inhibit the growth of food microorganisms and extend the shelf life of food to 1-2 times the original; the invention patent CN201611135218.3 is a preparation method of high-toughness collagen food preservative film, which discloses that it is made of spider silk , collagen, and chitosan compounded preservative film, the film has high mechanical strength, strong tensile resistance, and has fresh-keeping and antibacterial functions
[0004] The edible film made of a single material has low mechanical properties, poor oil and water resistance and gas resistance, and has a single function, which cannot meet people's various needs for food.
In the prior art, the edible film is mostly used for freshness preservation, but the edible value of the film itself is not high

Method used

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  • A preparation method of an edible fresh-keeping film and an application of the film in material fresh-keeping

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The degree of deacetylation of the chitosan powder of the present embodiment is 94%, the viscosity is 88mPa·s, and the moisture content is 7%.

[0038](1) Take 7 parts of chitosan powder, dissolve in 10 times the volume of sodium acetate buffer solution to prepare chitosan reaction solution, add 7 parts of ferulic acid powder, stir in a water bath oscillator at 50°C, 120rpm for 5min, Add 0.21 parts of laccase solution, place it in a microwave accelerated reaction device, and react for 5 hours; after the reaction is completed, centrifuge at 120 rpm for 5 minutes to remove impurities, and add 1 mol / L NaOH solution until the precipitation in the supernatant does not increase. Centrifugally wash the precipitate with a large amount of distilled water for 15 minutes, then extract with methanol for 12 hours to remove incompletely reacted phenol, wash away the methanol with distilled water, and freeze-dry to obtain laccase-modified chitosan powder;

[0039] The sodium acetate p...

Embodiment 2

[0048] (1) Take 10 parts of the above-mentioned chitosan powder, dissolve in 10 times the volume of sodium acetate buffer solution to prepare the chitosan reaction solution, add 10 parts of ferulic acid powder, and stir in a water bath oscillator at 55 °C at 120 rpm for 5 minutes , add 0.3 parts of laccase solution, place it in a microwave accelerated reaction device, and react for 6 hours; after the reaction is completed, centrifuge at 120rpm for 5 minutes to remove impurities, and add 1mol / L NaOH solution until the supernatant does not increase in precipitation. Centrifugally wash the precipitate with a large amount of distilled water for 10-15 minutes, then extract with methanol for 12 hours to remove incompletely reacted phenol, wash away the methanol with distilled water, and freeze-dry to obtain laccase-modified chitosan powder;

[0049] The sodium acetate pH is 5.0; the laccase activity is 1000u / g; the microwave heating temperature is 75°C, the microwave power is 320w, a...

Embodiment 3

[0058] (1) Take 7 parts of chitosan powder, dissolve in 10 times the volume of sodium acetate buffer solution to prepare chitosan reaction solution, add 7 parts of ferulic acid powder, stir in a water bath oscillator at 50°C, 120rpm for 5min, Add 0.21 parts of laccase solution, place it in a microwave accelerated reaction device, and react for 5 hours; after the reaction is completed, centrifuge at 120 rpm for 5 minutes to remove impurities, and add 1 mol / L NaOH solution until the precipitation in the supernatant does not increase. Centrifugally wash the precipitate with a large amount of distilled water for 15 minutes, then extract with methanol for 12 hours to remove incompletely reacted phenol, wash away the methanol with distilled water, and freeze-dry to obtain laccase-modified chitosan powder;

[0059] The sodium acetate pH is 5.0; the laccase activity is 800u / g; the microwave heating temperature is 70°C, the microwave power is 300w, and the reaction time is 10min;

[00...

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Abstract

The invention provides a preparation method of an edible fresh-keeping film and an application of the film in material fresh-keeping. The edible fresh-keeping film uses collagen-chitosan as a film matrix. Camellia oil, milk powder and other health care substances are added to improve the nutritional value of the film. Glycerol, genipin, sucrose esters and the other film-forming promoters with medicinal effects are added, which effectively improves the health value and mechanical ability of the film prolongs the fresh-keeping time, and has the effects of multi-function, environmental protectionand the like. The film can be used for packaging various materials such as food, health care products, medicine and feed. Meanwhile, the film can be eaten together with packaged materials to providea health care effect.

Description

technical field [0001] The invention relates to a preparation method of an edible health-care film and its application in material preservation, belonging to the fields of preparation of natural material films and food packaging. Background technique [0002] In recent years, with the enhancement of environmental awareness, people pay more and more attention to the environmental pollution and food safety problems caused by plastic packaging materials, and have higher requirements for food packaging materials. Therefore, degradable and edible products prepared from natural biological materials have attracted great attention. Degradable edible film is a new type of packaging material that can be coated to keep fresh and can be processed into bags, boxes and other packaging forms to replace traditional synthetic packaging materials such as plastics. At the same time, it can also be a component of food and add to food. Color, fragrance and nutritional value. However, most of t...

Claims

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Application Information

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IPC IPC(8): C08L89/00C08L5/08C08L91/00C08L3/02C08K13/02C08K5/103C08K5/098C08K3/16A23L3/3463A23L3/3508A23L3/3562A23L3/3571A23L3/358
CPCA23L3/3463A23L3/3508A23L3/3562A23L3/3571A23L3/358A23V2002/00C08J5/18C08J2389/00C08J2405/08C08K2003/162C08K2201/014C08L89/00C08L2201/08C08L2201/14C08L2203/16C08L2205/035C08L5/08C08L91/00C08L3/02C08K13/02C08K5/103C08K5/098C08K3/16A23V2200/10A23V2250/511A23V2200/222A23V2250/5422A23V2250/5114A23V2250/032A23V2250/1582A23V2250/1578A23V2250/192A23V2250/2132
Inventor 戚海冰
Owner 广西南宁桂尔创环保科技有限公司
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