A preparing method of a polymer Janus nanosheet PtBMA/PAM

The invention relates to a preparing method of a polymer Janus nanosheet PtBMA/PAM. SNP is adopted as a template. Amination modification and bromination modification are performed on the surface of the SNP to obtain SNP-Br. Polymerization of tert-butyl methacrylate is initiated by adopting the SNP-Br as an initiator, adopting CuBr as a catalyst, adopting Me TREN as a ligand and adopting EGDMA as a crosslinking agent to obtain SNP-g-PtBMA-Br, and then SNP-g-PtBMA-b-PAM is prepared by ATRP active polymerization adopting the SNP-g-PtBMA-Br as an initiator, adopting acrylamide as a monomer, adopting pentamethyldiethylenetriamine as a ligand and adopting cuprous bromide as a catalyst. Finally, hydrofluoric acid is used for etching to obtain a polymer balloon, and the polymer balloon is then crushed by a cell crusher to obtain a Janus nanosheet. The prepared polymer Janus nanosheet has a good emulsifying property.