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A kind of degradable Sclerotinia polysaccharide composite fresh-keeping film and its preparation method and application

A technology of sclerotinin and composite fresh-keeping, which is applied in the fields of application, preservation of fruits/vegetables with sugar, food ingredients as anti-microbial preservation, etc., and can solve the problems of hard-to-degrade fresh-keeping film products

Active Publication Date: 2021-07-06
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] For the above-mentioned plastic wraps, its functionality is often reflected in its fresh-keeping performance. However, for perishable fruits such as grapes, the requirements for the fresh-keeping function of the plastic wrap are more stringent. flavor and smell, and in terms of environmental protection, the problem of refractory degradation of conventional plastic wrap products is also more serious

Method used

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  • A kind of degradable Sclerotinia polysaccharide composite fresh-keeping film and its preparation method and application
  • A kind of degradable Sclerotinia polysaccharide composite fresh-keeping film and its preparation method and application
  • A kind of degradable Sclerotinia polysaccharide composite fresh-keeping film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation of the degradable Sclerotin polysaccharide composite plastic wrap of embodiment 1

[0042] (1) Preparation of potato starch solution: Weigh 5.0g of potato starch into 100ml of deionized water, place it on an electric stove and heat it slowly to about 60°C and keep stirring to make it fully swell until a uniform and viscous potato starch paste solution is obtained , filter out insoluble impurities with gauze to obtain a potato starch solution;

[0043] (2) Mixing of raw materials: Add 1.0g of crude Sclerotin to the potato starch solution, stir magnetically for 1-2h in a water bath at 35-50°C, and cool to room temperature; take 1.5g of glycerin and 0.05g of carboxymethyl chitosan and 64mg of tea seed oil, continued magnetic stirring for 10min, and defoamed for 20min under a vacuum of 0.06-0.09MPa to obtain a composite fresh-keeping film liquid of sclerotin; the molecular weight of the sclerotin was 300KDa.

[0044] (3) Film making: absorb 10ml of the Scle...

Embodiment 2

[0046] Embodiment 2 The preparation of a degradable Sclerotin composite plastic wrap, comprising the steps of:

[0047] (1) Preparation of potato starch solution: Weigh 20.0g of potato starch into 100ml of deionized water, place it on an electric furnace and heat it slowly to about 60°C and keep stirring to make it fully swell until a uniform and viscous potato starch paste solution is obtained , filter out insoluble impurities with gauze to obtain a potato starch solution;

[0048] (2) Mixing of raw materials: add 15.0 g of crude sclerotin to the above solution, and magnetically stir for 1-2 hours in a water bath at 35-50° C. to obtain a colloidal solution of sclerotin and potato starch, which is cooled to room temperature; The molecular weight of Sclerotin is 200KDa.

[0049] Weigh 4.4g of glycerin, 84mg of cinnamon essential oil and 90mg of olive oil, continue magnetic stirring for 20min, defoam under 0.06-0.09MPa vacuum for 20min, and obtain Sclerotin composite preservati...

Embodiment 3

[0052] Example 3 Preparation of a Degradable Sclerotin Composite Preservative Film

[0053] (1) Preparation of potato starch solution: Weigh 25g of potato starch in 500ml of deionized water, place it on an electric stove and heat it slowly to about 70°C and keep stirring to make it fully swell until a uniform and viscous paste solution is obtained. Filter out insoluble impurities to obtain a potato starch solution;

[0054] (2) Mixing of raw materials: Add 5.0 g of crude Sclerotin to the above solution, magnetically stir the colloidal solution of Sclerotin and potato starch for 1-2 hours in a water bath at 35-50°C, and cool to room temperature; the Sclerotin The polysaccharide molecular weight is 200KDa.

[0055] Take 4.0g of glycerin, 100mg of clove essential oil and 64mg of tea seed oil, continue magnetic stirring for 20min, and defoam under a vacuum of 0.06-0.09MPa for 20min to obtain the Sclerotin composite preservative film liquid.

[0056] Soak the grapes in the sclero...

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Abstract

The invention discloses a degradable Sclerotinia polysaccharide composite fresh-keeping film, a preparation method and application thereof, and belongs to the field of fresh-keeping materials. The Sclerotin composite fresh-keeping film of the present invention is composed of the following raw materials in percentage by weight: 0.5-20.0% Sclerotin, 5.0-20.0% potato starch, 0.08-5.0% glycerin, 0.05-1.0% antioxidant, antibacterial agent 0.01~0.1%, the balance is deionized water. The preservative film prepared by the invention has good water and oxygen resistance properties, can effectively delay the rot process of fruits and vegetables in the storage process after picking, and retain the moisture, aroma and color of fruits and vegetables, thereby increasing the market value of fruits and vegetables. At the same time, the film has good It has film properties such as flexibility and high mechanical strength, and has multiple functional properties such as significant biodegradability. It can be widely used in the field of food industry and packaging materials, and has high commercial application value.

Description

technical field [0001] The invention belongs to the field of composite film materials, and in particular relates to a degradable Sclerotinia polysaccharide composite fresh-keeping film and a preparation method and application thereof. Background technique [0002] In the context of global food safety and environmental protection issues, the application of polyethylene materials in food has been greatly curbed, and the birth of edible fresh-keeping packaging materials has solved these two problems and has become an important food research. field. Its principle is based on natural edible polymers, supplemented with edible plasticizers, cross-linking agents and functional additives, and forms a porous network structure through the interaction between different molecules. For example, starch, curdlan gum, xanthan gum, konjac glucomannan, gellan gum, alginate and its modified materials have been widely used in the field of biomaterials due to their good film-forming ability. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L5/00C08L5/08C08K5/00C08K5/053C08J5/18A23B7/16A23B7/08
CPCA23B7/08A23B7/16A23V2002/00C08J5/18C08J2303/02C08J2405/00C08J2405/08C08K5/0058C08K5/053A23V2200/02A23V2200/10A23V2250/511A23V2250/5118
Inventor 宋佳王敏贾玉香郑宇周隽涵屠琳娜夏婷骆健美
Owner TIANJIN UNIV OF SCI & TECH