Composite coating fresh keeping agent containing hawthorn leaf flavone and preparation method and application thereof

A hawthorn leaf flavonoid and compound fresh-keeping technology, which is applied in the application, food preservation, food science and other directions, can solve the problems of lack of anti-oxidation and inhibition of microbial activities and other multi-functional comprehensive fresh-keeping effects, large chemical fresh-keeping residues, and safety doubts. , to achieve the effect of improving synergistic antioxidant and bacteriostatic activities, obvious fresh-keeping effect, and enhancing integrity

Inactive Publication Date: 2015-12-02
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the existing fresh agricultural products, the use of chemical preservation has a large residual amount, and its safety has been questioned by consumers; while the coating film preservative only has a certain effect of gas barrier and moisture resistance, and lacks multifunctional comprehensive preservation such as anti-oxidation and inhibition of microbial activities. effect, the invention provides a composite coating preservative containing hawthorn leaf flavonoids and its preparation method and application

Method used

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  • Composite coating fresh keeping agent containing hawthorn leaf flavone and preparation method and application thereof
  • Composite coating fresh keeping agent containing hawthorn leaf flavone and preparation method and application thereof
  • Composite coating fresh keeping agent containing hawthorn leaf flavone and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0029] An extraction of hawthorn leaf flavonoids is characterized in that the following method is used to extract:

[0030] (1) Mix the powder of hawthorn leaves with 70vol% ethanol solution according to the ratio of material to liquid: 1g: 20mL, then add acetic acid to adjust the pH value to 4, stir evenly, add to the ultrasonic extractor, and heat up to 3°C / min. 50°C, under the condition of power of 500W, repeat the extraction three times, each time for 20min;

[0031] (2) Combine the extracts and filter, and when the filtrate is extracted with ethyl acetate until it becomes nearly transparent, remove the ethyl acetate layer with a separatory funnel, concentrate in a rotary evaporator, and freeze-dry to obtain hawthorn leaf flavonoids.

[0032] A compound preservative containing hawthorn leaf flavonoids extract, raw materials are:

[0033] Hawthorn leaf flavonoid extract 0.5 parts, carboxymethyl chitosan 30 parts, glycerin 30 parts, calcium chloride 5 parts, polyethylene gl...

Embodiment 2

[0040] A hawthorn leaf flavone is characterized in that it is extracted by the following method:

[0041] (1) Mix the powder of hawthorn leaves with 70vol% ethanol solution according to the ratio of material to liquid: 1g: 20mL, then add acetic acid to adjust the pH value to 4.5, stir well, add it to an ultrasonic extractor, and heat up to 4°C / min. 50°C, under the condition of power of 500W, repeat the extraction three times, each time for 20min;

[0042] (2) Combine the extracts and filter, and when the filtrate is extracted with ethyl acetate until it becomes nearly transparent, remove the ethyl acetate layer with a separatory funnel, concentrate in a rotary evaporator, and freeze-dry to obtain hawthorn leaf flavonoids.

[0043] A compound preservative containing hawthorn leaf flavonoids extract, raw materials are:

[0044] Hawthorn leaf flavonoid extract 0.95 parts, carboxymethyl chitosan 19 parts, glycerin 36 parts, calcium chloride 7.8 parts, polyethylene glycol (molecul...

Embodiment 3

[0047] A hawthorn leaf flavone is characterized in that it is extracted by the following method:

[0048] (1) Mix the powder of hawthorn leaves with 70vol% ethanol solution according to the ratio of material to liquid: 1g: 20mL, then add acetic acid to adjust the pH value to 5, stir evenly, add to the ultrasonic extractor, and heat up to 50°C, under the condition of power of 500W, repeat the extraction three times, each time for 20min;

[0049](2) Combine the extracts and filter, and when the filtrate is extracted with ethyl acetate until it becomes nearly transparent, remove the ethyl acetate layer with a separatory funnel, concentrate in a rotary evaporator, and freeze-dry to obtain hawthorn leaf flavonoids.

[0050] A compound preservative containing hawthorn leaf flavonoids extract, raw materials are:

[0051] Hawthorn leaf flavonoid extract 1.5 parts, carboxymethyl chitosan 10 parts, glycerin 40 parts, calcium chloride 10 parts, polyethylene glycol (molecular weight 600)...

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Abstract

The invention relates to an antioxidative and antibacterial composite coating fresh keeping agent containing hawthorn leaf flavone and a preparation method and application thereof, and belongs to the technical field of fresh agricultural product fresh keeping. The composite fresh keeping agent is prepared from, by weight, 0.5-1.5 parts of hawthorn leaf flavone, 10-30 parts of carboxymethyl chitosan, 30-40 parts of glycerinum, 5-10 parts of calcium chloride, 10-20 parts of polyethylene glycol, 0.3-0.5 part of tween-20 and 1000 parts of water. According to the composite fresh keeping agent, through synergistic action of all the components, the hygroscopicity and uniformity of a composite fresh keeping agent coating film are improved, the integrality of a finished film is enhanced, the film is not cracked after air drying is performed, the coating film not only has the good air-resisting and dampness-resisting properties, but also has the excellent antioxidative and antibacterial effects, and the fresh keeping effect is obvious; the composite fresh keeping agent is green and environmentally friendly in components, good in water solubility, easy to clean and free of toxic and side residues and has a wide market prospect.

Description

Technical field [0001] The present invention involves a composite preservation agent, which specifically involves a composite coating film preservation agent and its preparation methods and applications with antioxidant and bacteriostatic characteristics. Background technique [0002] Hawthorn (CrataeguspinnatiFidab.) Is a genus plant of Rosaceae hawthorn, which has a long history of health and medicinal medicine in my country.Since the 1950s, people have started researching the chemical composition of hawthorn leaves, confirming that there are a large amount of flavonoids, as well as hawthorn acid, choloic acid, choline, volatile oil, etc. Among them, the content of flavonoids is as high as 1.8%to 2%, 20 ~ 120 times the fruit content.Hawthorn leaves have a variety of functions such as moisturizing the lungs, anti -cancer and anti -cancer, lowering blood pressure, lowering blood lipids, and preventing arteriosclerosis. In recent years, it has been increasingly valued by people.Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L3/3499
CPCA23L3/3499
Inventor 李文香樊铭聪陆韵超高春艳尹思媛
Owner QINGDAO AGRI UNIV
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