Starch-based high-stability Pickering emulsion and preparation method thereof

Abstract

The invention discloses a starch-based high-stability Pickering emulsion and a preparation method thereof. The preparation method comprises the following steps: preparing starch slurry with a dry basis mass fraction of 5-20% by a starch raw material, gelatinizing the material in a boiling water bath, cooling the material, dropwise adding excessive ethanol, carrying out centrifugal classification,precipitating the material, and drying the material to obtain V-shaped crystalline starch; fully mixing molten fatty acid with V-shaped crystalline starch, continuously stirring the materials, and carrying out forced air drying to obtain starch lipid composite particles; preparing starch lipid composite particles into a suspension aqueous solution; mixing a suspension aqueous solution with liquidgrease, and shearing at a high speed to obtain the starch-based high-stability Pickering emulsion. The emulsion index of the emulsion can reach 100%, emulsion droplets are uniformly distributed, the average particle size of the emulsion droplets is 10.13-25.20 mu m, and the emulsion droplets are not layered after being stored for three months. The emulsion has the characteristics of simple process, rich raw material sources, environmental protection and the like, and can be widely applied to the fields of food, cosmetics, chemical industry, medicines and the like.

Description

technical field

[0001] The present invention relates to lipid complex V-type crystalline starch, and relates to a green preparation method of a novel hydrophobic modified starch as a Pickering emulsifier. The method involves "lipid complex" green hydrophobic modified starch, thereby obtaining a novel food-grade two An affinity Pickering emulsifier belongs to the field of food industry. Background technique

[0002] Pickering emulsion refers to a new type of emulsion that uses solid particles adsorbed at the oil-water interface instead of surfactants as a stabilizer. The preparation process is simple and the emulsion stability is excellent. With people's growing consumer demand, the market's demand for products with labels such as "environmentally friendly and green" continues to increase. Pickering emulsions stabilized by bio-based solid particles have gradually attracted people's attention. They are used in food, cosmetics, chemicals, materials, etc. There is a huge market...

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