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Preparation process and application of a nano-silver composite fruit preservative for Nanfeng Tangerine preservation

A preparation process, nano-silver technology, applied in compound fruit preservative, nano-silver compound fruit preservative preparation process and application field, to achieve the effect of convenient use, prolonging the fresh-keeping period, inhibiting respiration and transpiration

Inactive Publication Date: 2016-03-02
EAST CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because chitosan is the main component in the prior art, no suitable antistaling agent with good fresh-keeping effect has been found, so the chemical preservatives listed as banned drugs by the European Union are still used in the preservation of Nanfeng tangerines.

Method used

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  • Preparation process and application of a nano-silver composite fruit preservative for Nanfeng Tangerine preservation

Examples

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Embodiment 1

[0021] Dissolve chitosan in 2% acetic acid solution to make 1.0% chitosan acetic acid solution for later use; dissolve carboxymethyl chitosan in deionized water to make 1.0% carboxymethyl chitosan deionized aqueous solution for later use ; Mix 1.0% chitosan acetic acid solution, 1.0% carboxymethyl chitosan deionized aqueous solution and glycerin at 50:50:1 by mass, stir and add a certain amount of nano-silver zirconia (silver 5.0%, Zirconia 95.0%) made of nano-silver composite fruit preservative with a concentration of 50ppm nano-silver.

[0022] Immerse newly picked fruits, such as mature Nanfeng tangerines, in nano-silver composite preservative. After drying, it will form a colorless and odorless protective film on the fruit skin, which can not only kill Penicillium and Aspergillus niger Various molds and bacteria can also isolate the tangerine skin from contact with molds and bacteria to further protect the fruit; it can not only maintain the luster and flavor of the tanger...

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Abstract

The invention discloses a nano-silver composite fruit fresh-keeping agent and its preparation process and application. The components and their mass parts are: 40-60 parts of chitosan acetic acid solution with a mass concentration of 1.0%, and 1.0% carboxylic acid solution with a mass concentration of 1.0%. 40-60 parts of methyl chitosan deionized aqueous solution, 0.5-1.5 parts of glycerin, 0.05-0.1 parts of nano-silver zirconia, wherein the mass of nano-silver zirconia accounts for 5.0% and the mass of nano-zirconia accounts for 95.0%. The present invention is a fruit fresh-keeping agent with water solubility and superior antibacterial performance. By adopting natural biopolymer materials, it has various characteristics such as safety, non-toxicity, film formation, antibacterial, edible and degradable, and can inhibit the growth of peel cells. Respiration and transpiration, reduce water, total sugar, total acid, VC loss, keep it at a high level, and then prolong the fruit preservation period, thereby avoiding a series of fruit preservation problems caused by chemicals, non-toxic Harmless, green and environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of biological materials, and relates to a composite fruit fresh-keeping agent, in particular to a preparation process and application of a nano-silver composite fruit fresh-keeping agent for Nanfeng mandarin orange preservation. Background technique [0002] Chitosan ( Chitosan ) An arthropod shell extract, the main component is a derivative of deacetylated chitin, which is a cationic polymer polysaccharide. Chitosan is safe, non-toxic, easy to be washed off by water, and can be used in food preservatives. Advantages of biodegradation and absence of residual toxicity. The mechanism of action of chitosan is to form a semipermeable membrane on the surface of the fruit, thereby regulating the physiological metabolism of the fruit after picking and inhibiting microorganisms. Chitosan is produced by deacetylation of chitin, and the molecule contains hydroxyl It can be used as a substitute in the production ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A23B7/154
Inventor 黄德娟黄德欢乐攀谭志敏黄德超陈浩施平修
Owner EAST CHINA UNIV OF TECH
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