Preparation method of acid-soluble soybean protein-chitosan nanoparticles

The invention provides a preparation method of acid-soluble soybean protein-chitosan nanoparticles. The preparation method comprises the following steps: dissolving soybean protein isolate in water toobtain a solution A; dissolving chitosan in an acetic acid aqueous solution to obtain a solution B; mixing the solution A and the solution B, fixing the volume by using an acetic acid aqueous solution, adjusting the pH value to 3.0-3.55, and performing heating for 20-30 minutes by adopting high-pressure steam at 115-125 DEG C, so as to obtain an acid-soluble soybean protein mixed solution, namelythe acid-soluble soybean protein-chitosan nanoparticles. The acid-soluble soybean protein-chitosan nanoparticles are prepared by adding the polysaccharide and combining high-pressure heat treatment,and compared with a mode of only adding the polysaccharide and not combining high-pressure heat treatment, the light transmittance of the obtained acid-soluble soybean protein mixed solution is remarkably improved, the particle