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Preparation method of plant-based fresh-keeping film

A plastic wrap, plant-based technology, applied in the preservation of food ingredients as anti-microbial, food science, food ingredients containing natural extracts, etc. Oxidative effect, cholesterol lowering, antiseptic and bacteriostatic effect

Inactive Publication Date: 2019-01-08
袁杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Technical problem to be solved by the present invention: Aiming at the problems of biodegradation and poor antibacterial performance of commonly used plastic wraps at present, a preparation method of plant-based plastic wrap is provided

Method used

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  • Preparation method of plant-based fresh-keeping film

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preparation example Construction

[0031] A preparation method of plant-based plastic wrap, comprising the steps of:

[0032] (1) Mix beet meal and solvent A according to the mass ratio of 1:20~30, stir magnetically at 400~600r / min for 30~50min, let stand for 3~6h, filter, and take the filter residue and dry it in an oven at 60~75℃ until If the water content is less than 5%, pretreated sugar beet meal is obtained. In a water bath at 50-75°C, polyethylene glycol, glycerol, and silicotungstic acid are mixed at a mass ratio of 5:1-2:0.01 to obtain a mixed solution. Add the pretreated sugar beet meal with 25-50% of the mixed liquid to the mixed solution, and mix it with 300W microwave treatment for 10-15 minutes to obtain the processed sugar beet meal, which is set aside;

[0033] (2) Mix radish red pigment and solvent B according to the mass ratio of 1:20~40, stir magnetically at 350~500r / min for 30~50min, pass through a microporous filter membrane of 0.18~0.22μm, and perform ultrafiltration at 0.2~0.5MPa. Filter...

Embodiment 1

[0038] Adjuvant: Mix paraffin and epichlorohydrin at a mass ratio of 1:4 to obtain the adjuvant.

[0039] Solvent A: Take PBS buffer, NH at a mass ratio of 5:1 4 Cl mixed to obtain solvent A.

[0040] Solvent B: Mix 10% NaOH solution and sodium bicarbonate at a mass ratio of 12:1 to obtain solvent B.

[0041]Plasticizer: Dibutyl phthalate.

[0042] Initiator: sodium persulfate.

[0043] Defoaming agent: Mix polydimethylsiloxane and microcrystalline paraffin at a mass ratio of 5:1 to obtain a defoaming agent.

[0044] Emulsifier: Mix rosin lecithin and soybean lecithin at a mass ratio of 5:1 to obtain an emulsifier.

[0045] Tannin: Arbutus tannin.

[0046] Auxiliary: mix sodium citrate, sodium alginate and carrageenan at a mass ratio of 3:1:1 to obtain the adjuvant.

[0047] A preparation method of plant-based plastic wrap, comprising the steps of:

[0048] (1) Mix sugar beet meal and solvent A according to the mass ratio of 1:20, stir magnetically at 400r / min for 30min...

Embodiment 2

[0054] Adjuvant: Mix paraffin and epichlorohydrin at a mass ratio of 1:7 to obtain the adjuvant.

[0055] Solvent A: Take PBS buffer, NH at a mass ratio of 5:2 4 Cl mixed to obtain solvent A.

[0056] Solvent B: Mix 10% NaOH solution and sodium bicarbonate at a mass ratio of 18:1 to obtain solvent B.

[0057] Plasticizer: Dioctyl phthalate.

[0058] Initiator: potassium persulfate.

[0059] Defoamer: Mix polydimethylsiloxane and microcrystalline paraffin at a mass ratio of 5:2 to obtain a defoamer.

[0060] Emulsifier: Mix rosin lecithin and soybean lecithin at a mass ratio of 5:2 to obtain an emulsifier.

[0061] Tannins: Grape tannins.

[0062] Auxiliary: Mix sodium citrate, sodium alginate and carrageenan at a mass ratio of 3:2:1 to obtain the adjuvant.

[0063] A preparation method of plant-based plastic wrap, comprising the steps of:

[0064] (1) Mix sugar beet pulp and solvent A at a mass ratio of 1:30, stir magnetically at 600r / min for 50min, let it stand for 6h,...

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Abstract

The invention discloses a preparation method of a plant-based fresh-keeping film and belongs to the field of packing materials. The preparation method disclosed by the invention has the beneficial effects that polyol is prepared by taking beet pulp as a raw material, silicotungstic acid as a catalyst, and polyethylene glycol and glycerol as a compound liquefier, the biological bacteriostasis of the polyol can be fully played in combination with a radish red pigment actor, so that the biodegradation of a fresh-keeping film system is improved; a compound is prepared by taking tannin as a raw material, and the tannin contains multiple phenolic hydroxyl groups and can be crosslinked with ligand imino groups of proteins to form a bond, so that hydrogen bonding of the tannin with water is replaced; the convergence of the hydrolyzed tannin is directly related to the content of hydrophobic groups, and the condensed tannin is related to the degree of polymerization; the larger amino acid fattygroups of the proteins are, the stronger the hydrophobicity is, so that the antiseptic and antibacterial effects of the system can be improved; in combination with the good film forming property of amodified emulsion solution, the emulsification and the dispersion are performed under the action of emulsifier component phospholipids, so that the biodegradability of the system is improved. The plant-based fresh-keeping film prepared by the preparation method disclosed by the invention solves the problem of poor biodegradability and bacteriostasis of a commonly-used fresh-keeping film.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to a preparation method of a plant-based fresh-keeping film. Background technique [0002] Fresh fruits maintain high physiological activity after harvesting, especially fruits with high water content are more likely to rot and deteriorate, which brings great difficulties to storage and transportation. How to reduce the loss of fresh fruits during storage, It is extremely important to prolong the storage period. Therefore, it is of great practical significance to study fresh fruit preservation methods. Coating film preservation technology is to artificially add a layer of protective film on the surface of fruits and vegetables to achieve the purpose of fruit and vegetable preservation. At present, the preservative films studied at home and abroad are basically biodegradable and have poor antibacterial performance, which affects the sensory quality of products and cannot ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/16D04H1/728
CPCA23B7/16A23V2002/00D04H1/728A23V2200/10A23V2250/211A23V2250/21A23V2250/30A23V2200/222A23V2200/22
Inventor 袁杰陈建春卢星
Owner 袁杰
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