Preparation method of molded pulp product containing quaternized nanocellulose

The invention discloses a preparation method of a paper pulp molded product containing quaternized nanocellulose, which comprises the following steps: step 1, defibering paper pulp by using a beater to obtain a paper pulp suspension; the preparation method comprises the following steps: putting corn amylopectin into water, dispersing and curing by using a mechanical stirrer to obtain a cured amylopectin aqueous solution; mixing and uniformly dispersing the paper pulp suspension and the cured amylopectin aqueous solution to obtain a first mixed solution; step 2, adding lauryl sodium sulfate into the first mixed solution, and dispersing the lauryl sodium sulfate for 20 minutes until the lauryl sodium sulfate is uniform by using a mechanical stirrer to obtain a second mixed solution; transferring the second mixed solution into a high-speed atomizing machine, and completing mechanical foaming under the mechanical shearing acting force to obtain a third mixed solution; step 3, transferring the third mixed solution