The invention discloses an
ellagic acid composite
solid dispersion and a preparation method thereof. The preparation method comprises the following steps: S1, respectively preparing a fucoidin
aqueous solution and an
ellagic acid ethanol suspension; s2, mixing the two solutions to obtain a
mixed solution; s3, adding the modified
polysorbate 20 and the
chitosan-CPP compound, and performing ultrasonic stirring; s4, ball milling; and S5, carrying out reduced pressure rotary
evaporation to remove the
solvent,
drying, crushing, and sieving with a 100-mesh
sieve to obtain the product. Ternary synergistic compounding is formed through the fucoidin-modified
polysorbate 20-
chitosan-CPP compound, a multi-dimensional molecular
interaction network is constructed, and the effect of remarkably improving the water
solubility and
dispersion stability of
ellagic acid is achieved; wherein
xylooligosaccharide branched chains of the modified
polysorbate 20, hydroxyl groups of the fucoidin and
phosphate groups of the
chitosan-CPP compound form a multi-point
hydrogen bond cross-linked structure through
hydrogen bonds, and the hydrophobic association effect and lattice stacking among ellagic acid molecules are broken through the steric hindrance effect.