Preparation method of long-term antibacterial and fresh edible coating liquid

Abstract

The invention relates to a preparation method of long-term antibacterial and fresh edible coating liquid, and belongs to the technical field of food processing. TP (tea polyphenol) extract liquid is taken as a raw material, by adding casein and theaflavin extracts, the long-term antibacterial and fresh edible coating liquid is prepared, TP is subjected to a complexation reaction with proteins in casein, precipitation will be formed under the action of hydrophobic-hydrogen bonding, with degree of association increasing, complexes show colloidal properties, and the solubility of the complexes will be changed with temperature; furthermore, the proteins are precipitated after phenolic hydroxyl groups interacting with the proteins and amino acids, so that the TP has the effects of sterilization, antivirus and the like. The complexation reaction is invertible. Curcumin has the double activity of oxidation loving and anti-oxidation, and has certain inhibitory effect on most of the bacteria and the inhibitory effect is significant, which is a good natural antibacterial agent and can effectively improve antibacterial energy of the edible coating liquid and preservation time of food.

Description

technical field [0001] The invention relates to a preparation method of a long-term antibacterial and fresh-keeping edible coating solution, which belongs to the technical field of food processing. Background technique [0002] Many fruit and vegetable products and food raw materials will deteriorate when exposed to the air at room temperature for a short period of time. Low-temperature and controlled-atmosphere storage are usually used to prolong the storage period of food raw materials. The principle of low-temperature refrigeration and fresh-keeping for food raw materials is to reduce the activity of enzymes in the food raw material tissues by controlling the ambient temperature of the storage room, and at the same time reduce the metabolic activity. In order to achieve the purpose of reducing or maintaining the characteristics of food raw materials within a certain period of time. The modified atmosphere preservation technology can be defined as achieving a gas environm...

AI Technical Summary

Problems solved by technology

However, the existing coating film preservation technology still has the following deficiencies: (1) if the product is stored at room temperature after coating, the shelf life is short and the product quality is not ideal; (2) if combined with controlled atmosphere storage or low temperature storage , although the preservation effect is ideal, but the cost is high; (3) adding other preservatives to the coating solution can improve product quality, but there will be a certain amount of residual