Nano-silver composite fruit preservative, preparation technology and application thereof

Abstract

The invention discloses a nano-silver composite fruit preservative, a preparation technology and an application. The nano-silver composite fruit preservative comprises the following ingredients by mass parts: 40-60 parts of chitosan acetate with mass concentration of 1.0%, 40-60 parts of carboxymethyl chitosan deionized water with mass concentration of 1.0%, 0.5-1.5 parts of glycerin, and 0.05-0.1 parts of nano-silver zirconia, wherein nano-silver mass accounts for 5.0% of the mass of nano-silver zirconia, and nano zirconia mass accounts for 95.0%. The water-soluble fruit preservative has superior antibacterial property, by employing a natural biomacromolecule material, the fruit preservative has a plurality of characteristics of safety, no toxicity, film formation, bacteriostasis, edibility and biodegradability, respiration and transpiration of pericarp cells can be inhibited, so that loss of moisture, total sugar, total acid and VC can be reduced, the nano-silver composite fruit preservative can be kept at a high level and can prolong the shelf life of the fruits, so that a series of fruit fresh-keeping problem due to chemical medicine can be avoided, and the nano-silver composite fruit preservative has the advantages of nontoxicity and innocuousness, and green and environmental protection.

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 nano-silver composite fruit fresh-keeping agent and its preparation process and application. 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 of candied candied fruit and juice dri...

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.