Pulullan and ginkgo nut protein isolate composite gel and preparation method thereof

The invention discloses pulullan and ginkgo nut protein isolate composite gel and a preparation method thereof, and belongs to the technical field of functional food. The preparation method comprises the following steps: (1) dissolving ginkgo nut protein isolate powder in deionized water to obtain a ginkgo nut protein isolate solution; (2) dissolving pullulan in deionized water to obtain a pullulan hydrated polysaccharide solution; (3) mixing and stirring the ginkgo nut protein isolate solution and the pulullan solution to obtain a protein-polysaccharide mixed solution; (4) adjusting the pH value of the protein-polysaccharide mixed solution, and mixing and stirring to obtain a composite solution; and (5) carrying out heat treatment on the protein solution, and cooling to obtain the pulullan and ginkgo nut protein isolate composite gel. The ginkgo nut protein isolate composite gel prepared by the method disclosed by the invention has good viscoelasticity and gel strength, widens the application of ginkgo nut p