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Composite coating film fresh keeping agent containing persimmon leaf flavones as well as preparation method and application of composite coating film fresh keeping agent

A technology of compound preservation and persimmon leaf flavonoids, which is applied in the field of preservation of fresh agricultural products, can solve the problems of consumers' doubts about safety, large chemical preservation residues, lack of multifunctional and comprehensive preservation effects such as anti-oxidation and inhibition of microbial activities, etc., to achieve Improve synergistic antioxidant and antibacterial activity, obvious fresh-keeping effect, excellent antioxidant effect

Inactive Publication Date: 2016-02-03
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 such as fruits, vegetables, and bacteria, chemical preservation has a large residual amount, and its safety has been questioned by consumers; while film-coated preservatives generally only have a certain effect of blocking gas and moisture, lacking anti-oxidation and inhibition The practical problem of multi-functional comprehensive fresh-keeping effects such as microbial activities, the present invention provides a composite preservative containing persimmon leaf flavonoids and its preparation method and application

Method used

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  • Composite coating film fresh keeping agent containing persimmon leaf flavones as well as preparation method and application of composite coating film fresh keeping agent
  • Composite coating film fresh keeping agent containing persimmon leaf flavones as well as preparation method and application of composite coating film fresh keeping agent
  • Composite coating film fresh keeping agent containing persimmon leaf flavones as well as preparation method and application of composite coating film fresh keeping agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] An extraction of persimmon leaf flavonoids is characterized in that the following method is used to extract:

[0031] (1) Mix the powder of persimmon leaves with 45vol% ethanol solution according to the ratio of material to liquid: 1g: 35mL, then add acetic acid to adjust the pH value to 4, stir evenly, add to the ultrasonic extractor, and heat up to 50°C, under the condition of 500W power, repeat the extraction three times, 20min each time; (2) Combine the extracts and filter, and when the filtrate is extracted with ethyl acetate until it is nearly transparent, use a separatory funnel to remove the ethyl acetate layer, and then After concentrating in a rotary evaporator, freeze-dry to obtain persimmon leaf flavonoids.

[0032] A compound antistaling agent containing persimmon leaf flavonoids, the raw materials of which are:

[0033] 0.5 parts of persimmon leaf flavonoids extract, 30 parts of carboxymethyl chitosan, 30 parts of glycerin, 5 parts of calcium chloride, 20...

Embodiment 2

[0040] An extraction of persimmon leaf flavonoids is characterized in that the following method is used to extract:

[0041] (1) Mix the powder of persimmon leaves and 45vol% ethanol solution according to the ratio of solid to liquid: 1g: 35mL, then add acetic acid to adjust the pH value to 5, stir evenly, add it to an ultrasonic extractor, and heat up to 50 at a heating rate of 4°C / min ℃, 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 is nearly transparent, remove the ethyl acetate layer with a separatory funnel, concentrate in a rotary evaporator, and freeze-dry to obtain persimmon leaf flavonoids.

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

[0044] 0.95 parts of persimmon leaf flavonoids extract, 19 parts of carboxymethyl chitosan, 36 parts of glycerin, 7.8 parts of...

Embodiment 3

[0047] An extraction of persimmon leaf flavonoids is characterized in that the following method is used to extract:

[0048] (1) Mix the powder of persimmon leaves with 45vol% ethanol solution according to the ratio of material to liquid: 1g: 35mL, then add acetic acid to adjust the pH value to 4.5, then add monoglyceride citric acid accounting for 20% of the mass of persimmon leaves, stir well and then add ultrasonic In the extractor, the temperature was raised to 50°C at a heating rate of 4°C / min, and the extraction was repeated three times at a power of 500W for 20 minutes each time;

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

[0050] A compound antistaling agent containing persimmon leaf flavonoids, the raw materials of which are:

[0051] Per...

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Abstract

The invention relates to a composite coating film fresh keeping agent containing persimmon leaf flavones and having characteristics of oxidation resistance and bacteriostasis, as well as a preparation method and application of the composite coating film fresh keeping agent, and belongs to the technical field of fresh keeping of fresh agricultural products. The composite fresh keeping agent consists of the following raw materials in parts by weight: 0.5-1.5 parts of persimmon leaf flavones, 10-30 parts of carboxymethyl chitosan, 30-40 parts of glycerine, 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 provided by the invention, all the components have a synergistic reaction, so that the hygroscopicity and the homogeneity of composite coating film fresh keeping agent are improved, the filming integrity is strengthened, and after being air-dried, coating films are not cracked, so that the coating films not only have favorable properties of resisting air and resisting dampness but also have excellent antioxidative and antibacterial effects and obvious fresh keeping effects; all the components of the composite fresh keeping agent disclosed by the invention are environmental-friendly, good in water solubility, easy to clean and free from toxic and side residues, so that the composite fresh keeping agent has broad market prospects.

Description

technical field [0001] The invention relates to a composite preservative, in particular to a composite coating preservative containing persimmon leaf flavonoids with anti-oxidation and antibacterial properties, a preparation method and application thereof, and belongs to the technical field of fresh agricultural products. Background technique [0002] Persimmon leaves are the leaves of the persimmon plant Diospyroskaki Thunb. my country is the country that produces the most persimmons in the world, with an annual output of more than 700,000 tons of fresh persimmons. Persimmon leaves are by-products of the persimmon industry. Therefore, my country has abundant persimmon leaf resources. Persimmon leaves have multiple functions such as clearing away heat and detoxification, nourishing the lungs and strengthening the heart, antitussive and hemostasis, anti-cancer and anti-cancer, etc., and have been increasingly valued by people in recent years. The main functional components o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/154A23L3/3562
CPCY02A40/90
Inventor 李文香樊铭聪吴昊王世清张鑫
Owner QINGDAO AGRI UNIV
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