Egg preservation whey protein self-assembly fiber coating agent and application method thereof

Abstract

The invention provides an egg preservation whey protein self-assembly fiber coating agent and an application method thereof. A whey protein solution with,mass concentration of 2-4% is prepared by using deionized water; the pH value of the solution is adjusted to 1.5-2.5 through 3mol / L hydrochloric acid, the solution is centrifuged for 15-20 min at a rotating speed of 9000r / min and at 4 DEG C, and the supernatant is subjected to suction filtration by a mixed fiber membrane with pore diameter of 0.45 micron; the filtrate is added into an airtight round-bottom flask and is heated in a water bath oscillation manner for 7-9h at 75-85 DEG C and a rotating speed of 300r / min to obtain fibrous protein, and the fibrous protein is freeze-dried or spray-dried to obtain fibrous protein powder. According to the invention, the whey protein is used as the raw material and is treated to form the fibrous protein powder with a certain length. The powder is prepared into 2-4% solution to coat eggs, protective films formed after air drying can effectively block air holes and seal tiny cracks to keep the eggs fresh and prolong the quality guarantee period by three to four times.

Description

technical field [0001] The invention relates to an egg fresh-keeping whey protein self-assembled fiber coating agent and a use method thereof, and belongs to the technical field of egg preservation film agents and use methods. Background technique [0002] Eggs are the main poultry and egg products in my country. They are rich in protein, fat, various vitamins, trace elements, riboflavin, DHA and lecithin and other nutrients needed by the human body. They have always been regarded as natural nutrients by countries all over the world. Eggs are mainly composed of outer eggshell membrane, eggshell with pores, inner eggshell membrane, egg white and egg yolk. The outer eggshell membrane is the first layer of protection for the egg. It is a colloidal protein mucus that can prevent the invasion of microorganisms such as bacteria and mold. However, the membrane will fall off by itself about a week after the fresh egg is laid. Once the outer eggshell membrane falls off or disappears...

AI Technical Summary

Problems solved by technology

[0007] The disadvantage of the above-mentioned method is that when used, the egg coating solution needs to go through a complicated preparation process and needs to add various auxiliary agents and additives (such as glycerin, anhydrous Na 2 SO 3 , TG enzyme, ε-polylysine, nisin, etc.), and requires suction filtration equipment, which will cause a lot of trouble in actual use, and the fresh-keeping effect only prolongs the shelf life of eggs by 1 times

Images