Preparation method of water-repellent vitamin microcapsules

Abstract

The invention provides a method for preparing hydrophobic vitamin microcapsules, and relates to vitamin microcapsules. The method comprises the following steps: (1) adding an oil-phase core material in an agitating pan, and melting the oil-phase core material to prepare vitamin oil containing antioxidant, wherein the oil-phase core material comprises lipid-soluble vitamin, an antioxidant and other greases; (2) dissolving a wall material in water to prepare a water solution with solid content of 20-60wt% to obtain a water phase; (3) adding the vitamin oil containing antioxidant prepared in the step (1) into the water phase obtained in the step (2), and emulsifying and homogenizing to form uniform emulsion; (4) adding protein active enzyme into the emulsion prepared in the step (3), granulating, performing a crosslinking reaction, and drying to obtain the hydrophobic vitamin microcapsules. According to the method, other toxic or strong oxidizing chemical substances are not added, the prepared microcapsules are safer and more environment-friendly, has longer shelf life, and is high in embedding rate and low in surface oil, so that the microencapsulation efficiency can be further improved.

Description

technical field [0001] The invention relates to a vitamin microcapsule, in particular to a method for preparing a water-repellent vitamin microcapsule. Background technique [0002] Vitamins are organic compounds that are essential to maintain the normal growth and reproduction of animal organisms. They mainly participate in the biochemical reactions of animal metabolism in the form of coenzymes and catalysts. The biggest feature of vitamins is that they are unstable, highly perishable or invalid. Factors affecting its stability include trace elements, moisture, high temperature, light, acid or alkali, etc., which lead to the destruction of the activity of these vitamins in varying degrees during storage, production and processing. For example, vitamin A is easy to oxidize and deteriorate, especially when in contact with high-priced metal ions, the oxidation rate can be increased by tens of thousands of times. Vitamin A is also vulnerable to high heat. Granulated aquatic f...

AI Technical Summary

Problems solved by technology

This process has the following disadvantages: 1. The solid content of the emulsion is very low in the process of granulation using the composite coacervation method, resulting in low production efficiency; 2. The particles produced by the granulation using the composite coacervation method are widely distributed, resulting in a macroscopic appearance of the powder. Poor; 3. The use of transglutaminase for cross-linking and curing is to add transglutaminase after granulation and molding. The curing is a process from the surface to the inside. The surface of the first cross-linking and curing prevents the penetration of transglutaminase. The cross-linking in the middle of the particles is not complete, further resulting in a low embedding rate of the active ingredient vitamin E

This process has the following disadvantages: 1. The solid content of the emulsion is very low in the process of granulation using the composite coacervation method, resulting in low production efficiency; 2. The particles produced by the granulation using the composite coacervation method are widely distributed, resulting in a macroscopic appearance of the powder. Poor; 3. The use of glutaraldehyde for cross-linking and curing is added after granulation and molding. The curing is a process from the surface to the inside. The surface of the first cross-linking and curing prevents the penetration of glutaraldehyde and causes incomplete cross-linking in the middle of the particles. , resulting in a low embedding rate of the active ingredient vitamin E, only 85%; 4. Cross-linking uses glutaraldehyde for cross-linking and curing, and there is a problem of toxic and harmful substances remaining

This process has the following disadvantages: 1. Hydrogen peroxide is used in the cross-linking reaction, which causes vitamins to be destroyed during the microencapsulation process, resulting in low microencapsulation efficiency and low embedding rate; 2. Cross-linking reaction rate Low, long cross-linking reaction time, resulting in low production efficiency