Preparation method of grease microcapsule

Abstract

The invention discloses a preparation method of a grease microcapsule. The method comprises the following steps of adding a wall material, an emulsifier and an antioxidant into water, uniformly mixing, shearing and emulsifying to obtain a pre-emulsified liquid, and the wall material being a starch sodium-octenylsuccinate methacrylic acid-N, N-dimethylaminoethyl ester-chitosan copolymer; adding a grease core material into the pre-emulsified liquid, and sequentially shearing, emulsifying and homogenizing to obtain emulsified liquid; sterilizing the emulsified liquid; and carrying out spray drying on the sterilized emulsion, and sieving an obtained powder product to obtain the grease microcapsule. According to the method, the emulsified liquid is subjected to high-temperature sterilization before spray drying, so that the microcapsule is prevented from deteriorating under the action of microorganisms; and the copolymer of starch sodium-octenylsuccinate-N and N-dimethylaminoethyl methacrylate-chitosan is used as the wall material of the microcapsule, so that the high temperature resistance of the wall material is effectively improved, the demulsification phenomenon of the emulsion in the high-temperature sterilization process is prevented, and the embedding rate of the microcapsule is increased.

Description

technical field [0001] The invention relates to the technical field of microcapsules, in particular to a preparation method of oil microcapsules. Background technique [0002] Oils and fats have unique nutritional value and are widely used in the food industry. However, due to the high content of unsaturated fatty acids and special molecular structure in oil, it is easy to oxidize and deteriorate when exposed to high temperature, high concentration of oxygen and light, and even produce harmful substances to the human body; and the water incompatibility and odor of oil are limited. its application in food. Therefore, powder products embedded in microcapsules are generally added to food to avoid oxidation. [0003] Existing oil microcapsules generally use substances such as proteins, sugars or colloids as wall materials, and adopt spray drying to embed them. For example, "a kind of microencapsulated powder oil and its Production method", its announcement number CN103005006B...

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Problems solved by technology

[0005] The present invention is to overcome the oil microcapsule preparation process in the prior art, the emulsified liquid is not sterilized before spray drying, and the prepared microcapsules are easy to deteriorate under the action of microorganisms; and due to the high temperature resistance of the existing wall materials Poor, if the emulsion is sterilized at high temperature before spray drying, the emulsion is prone to demulsification at high temperature, resulting in the re-aggregation of oil droplets, resulting in the low embedding rate of the prepared microcapsules and the problem of easy oxidation and deterioration. Provide a method for preparing oil microcapsules. Before spray drying, the emulsion is sterilized at high temperature to avoid deterioration of the microcapsules under the action of microorganisms; and use sodium starch octenyl succinate-N,N-dimethyl The aminoethyl ester-chitosan copolymer is used as the microcapsule wall material, which effectively improves the high temperature resistance of the wall material, prevents the emulsification of the emulsion during high temperature sterilization, and improves the embedding rate of the microcapsules

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