Hemp seed protein pickering particles and a method for preparing hemp seed pickering emulsion
Disclosed are hemp seed protein Pickering particles as well as a preparation method and application thereof, belonging to the field of multi-component restructured foods. The preparation of Pickering emulsion based on hemp seed protein Pickering nanoparticles includes: preparing hemp seed protein Pickering particles by using an anti-solvent precipitation method under the condition of taking hemp seed protein as a raw material, formic acid and water as solvents; then, adding the prepared hemp seed protein Pickering particles into water together with maltodextrin and corn syrup solids for fully dissolving to form a homogeneous suspension; and adding vegetable oil into the suspension and mixing well to obtain the Pickering emulsion. The Pickering emulsion is high in stability, and powdered oil constructed by using same has the advantages of being environmentally-friendly, cost-saving, and easy to achieve high stability and high unsaturation, thus having wide application value in food and medicine fields.
1 . A method for preparing hemp seed protein-containing Pickering emulsion, comprising:
(1) crushing hemp seeds, removing oil from the hemp seeds by n-hexane solvent extraction and collecting a remaining solid part, and then performing alkali-soluble acid precipitation treatment on the remaining solid part to obtain a hemp seed protein powder;
(2) dissolving the hemp seed protein powder in a formic acid solution to prepare a hemp seed protein stock solution, and then adding the hemp seed protein stock solution dropwise into deionized water under stirring conditions to form a suspension;
(3) centrifuging the suspension, removing a bottom precipitate and then adjusting pH value, precipitating hemp seed protein nanoparticles, and then carrying out suction filtration to obtain a protein particle precipitate; and freeze-drying the protein particle precipitate to obtain dried hemp seed protein Pickering particles; and
(4) adding the hemp seed protein Pickering particles, maltodextrin, and corn syrup solids into water for fully dissolving to form a homogeneous suspension, adding vegetable oil into the suspension prepared, and then mixing well to obtain Pickering emulsion;
wherein the n-hexane has a ratio to the hemp seeds crushed of (5:1)-(10:1) (w/w).
2 . The method of claim 1 , wherein the alkali-soluble acid precipitation in (1) is performed at an alkali dissolution pH value of 8.0-11.0, and the acid precipitation pH value is 3.0-5.5.
3 . The method of claim 1 , wherein the formic acid solution has a ratio to the hemp seed protein powder of (10:1)-(20:1) (w/w).
4 . The method of claim 1 , wherein the protein stock solution has a ratio to the deionized water of (1:10)-(1:20) (v/v).
5 . The method of claim 1 , wherein the pH value is adjusted to 3.0-5.5 in (3).
6 . A hemp seed protein-containing Pickering emulsion prepared by the method of claim 1 .