Microencapsuled conjugated linoleic acid glyceride powder and preparation method thereof

A method for preparing a microencapsulated conjugated linoleic acid glyceride powder, comprising

• step 1:
• preparing raw materials containing the following components in parts by mass, based on a total mass of the raw materials of 100 parts:
• conjugated linoleic acid glyceride
• 60-85
• parts;
• starch or colloid
• 5-35
• parts;
• micromolecule filler
• 4-20
• parts;
• antioxidant
• 0.01-5
• parts;
• step 2:
• dissolving the starch or the colloid and the micromolecule filler in water at 40° C. to 60° ° C. to form a first mixture, and then cooling the first mixture to 0-30° C.;
• step 3:
• adding an aqueous phase antioxidant into the first mixture in step (2), and stirring at 0° to 30° C. until the aqueous phase antioxidant is completely dissolved in the first mixture to obtain the second mixture;
• step 4:
• adding an oil phase antioxidant into the conjugated linoleic acid glyceride, and stirring at 10-25° C. until the oil phase antioxidant is completely dissolved to obtain an oil phase;
• step 5:
• adding the oil phase into the second mixture to form a third mixture, controlling the temperature of the third mixture between 0-30° C., shearing and emulsifying the third mixture for 0.5 hour to 2 hours, and then homogenizing for 1 time to 3 times at 40-120 MPa to obtain an emulsion;
• and
• step 6:
• performing spray drying on the emulsion prepared in step (5) at an air inlet temperature of 90-230° C., and an air outlet temperature of 50-110° C.,
• wherein the starch comprises native starch or modified starch,
• the modified starch is selected from acid-modified starch, oxidized starch, starch acetate, phosphate acetate, cross-linked starch, hydroxypropyl starch, and pregelatinized starch, and mixtures thereof;
• and
• the colloid is selected from xanthan gum, gelatin, Arabic gum, and mixtures thereof,
• wherein the microsencapsulated conjugated linoleic acid glyceride powder has an embedding rate of 98.1% to 99.5% at an oil load of 70%.