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Fresh-keeping package film containing houttuynin element and chitosan and preparation method thereof

A technology of fresh-keeping packaging and houttuyniatin, which is applied in the field of houttuyniatin-containing chitosan fresh-keeping packaging film and its preparation, can solve the problems of fresh-keeping coatings such as odor and water resistance, poor antibacterial effect, and loss of nutrients. Achieve the effect of improving fresh-keeping effect, reducing breathing intensity, water resistance and antibacterial effect

Inactive Publication Date: 2017-09-22
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of odor in the existing fresh-keeping coating film, poor water resistance, poor antibacterial effect, and rapid loss of nutrients during the fresh-keeping process, and to provide a film-forming structure that is dense and uniform, with relatively high water resistance and antibacterial properties. Strong, good mechanical strength, inhibit gas exchange of berries, reduce respiration intensity, reduce water evaporation, reduce direct infection of berries by pathogenic bacteria, and a preparation method thereof

Method used

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  • Fresh-keeping package film containing houttuynin element and chitosan and preparation method thereof
  • Fresh-keeping package film containing houttuynin element and chitosan and preparation method thereof
  • Fresh-keeping package film containing houttuynin element and chitosan and preparation method thereof

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Embodiment 1

[0044] A kind of chitosan fresh-keeping packaging film containing houttuyniatin, its composition comprises: chitosan, gelatin, glycerin, houttuynia cordata, the number of parts by weight of described chitosan is 1.7, the number of parts by weight of described gelatin The number is 1.2, the parts by weight of the glycerin is 0.3, and the parts by weight of the Houttuynia cordata are 20-60.

Embodiment 2

[0046] According to the houttuyfotin-containing chitosan fresh-keeping packaging film described in embodiment 1, the chitosan is one of amphiphilic chitosan derivatives and hydrophilic chitosan derivatives, and the Amphiphilic chitosan derivatives are carboxyl dodecyl chitosan, carboxymethyl oleoyl chitosan, hydroxypropyl hexadecyl chitosan or oleoyl chitosan quaternary hinge salt Any one, the described hydrophilic chitosan derivative is a kind of carboxymethyl chitosan, hydroxypropyl chitosan or chitosan quaternary hinge salt.

Embodiment 3

[0048] A preparation method of chitosan fresh-keeping packaging film containing houttuyfonate, the method comprising the steps of:

[0049] (1) Wash the purchased Houttuynia cordata and dry it at 65°C, then crush it with a grinder, chop the Houttuynia cordata with a knife, and then add 70% ethanol solution;

[0050] (2) Extract the ethanol solution added with Houttuynia cordata in a constant temperature water bath at 40°C for 2 hours, then filter 3 times, and the filtrate is rotary evaporated to 1g / mL;

[0051] (3) Prepare 20-60g / 100ml of the filtrate with distilled water as a solvent to obtain Houttuynia cordata extract;

[0052] (4) Prepare chitosan solution of 1.7g / 100ml, gelatin solution of 1.2g / 100ml and glycerol solution of 0.3g / 100ml with distilled water as solvent respectively;

[0053](5) Mix the same volume of chitosan solution, gelatin solution, glycerin solution and Houttuynia cordata extract to make a composite preservation solution;

[0054] (6) Spray-coat the ...

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Abstract

The invention relates to a fresh-keeping package film containing houttuynin element and chitosan and a preparation method thereof. The existing composite coating film material has the disadvantages that the other cosolvent or coupling agent needs to be added, or the chemical method is adopted to form the core-shell structure; the components are relatively complicated, the eating safety is poor, the preparation process is complicated, and the final property of the composite coating film material is affected. The fresh-keeping package film is prepared from the following components in parts by weight: 1.7 parts of chitosan, 1.2 parts of gelatin, 0.3 part of glycerin, and 20 to 60 parts of herba houttuyninae.

Description

Technical field: [0001] The invention relates to the technical field of fresh-keeping coating film materials for berries, in particular to a chitosan fresh-keeping packaging film containing houttuyfonate and a preparation method thereof. Background technique: [0002] Coating freshness refers to coating the surface of berries with a film-forming substance with a very thin film by spraying, dipping, brushing, etc., so as to inhibit the gas exchange of fruits and vegetables, reduce the breathing intensity, and reduce the water content. The evaporation reduces the direct infection of the berries by pathogenic bacteria, better maintains the freshness and hardness of the berries, and achieves the fresh-keeping technology that delays the spoilage of the berries and keeps the berries fresh. Because of its simplicity, convenience, low cost, good effect, and easy promotion, it has become a relatively active research field at home and abroad. [0003] In the application process of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L5/08C08L89/00C08K5/053C08K5/07C08J5/18
CPCC08J5/18C08J2305/08C08J2489/00C08K2201/014C08L5/08C08L2203/16C08L89/00C08K5/053C08K5/07
Inventor 李洋王磊明李冰
Owner NORTHEAST FORESTRY UNIVERSITY
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