▎ 摘　　要

NOVELTY - Preparing polymer composite involves dispersing nanosheet filler within polymer matrix by dissolving monomer in water to form first solution, dispersing nanosheet filler in organic solvent in the presence of emulsifying agent to form second solution, combining first solution and second solution to form emulsion having weight ratio of nanosheet filler to monomer between 1:99-1:9, and adding polymerization initiator comprises persulfate to emulsion to initiate polymerization reaction of the monomer to form polymer composite precursor solution comprises polymer composite precursor within aqueous media. The polymer composite precursor comprises nanosheet filler dispersed in polymer matrix of the polymerized monomer. The polymerization reaction is quenched with the addition of first alcohol to th polymer composite precursor solution. USE - Method for preparing polymer composite. ADVANTAGE - The methhod enables to prepare polymer composite that improves dispersion characteristics. DETAILED DESCRIPTION - Preparing polymer composite involves dispersing nanosheet filler within polymer matrix by dissolving monomer in water to form first solution, dispersing nanosheet filler in organic solvent in the presence of emulsifying agent to form second solution, combining first solution and second solution to form emulsion having weight ratio of nanosheet filler to monomer between 1:99-1:9, and adding polymerization initiator comprises persulfate to emulsion to initiate polymerization reaction of the monomer to form polymer composite precursor solution comprises polymer composite precursor within aqueous media. The polymer composite precursor comprises nanosheet filler dispersed in polymer matrix of the polymerized monomer. The polymerization reaction is quenched with the addition of first alcohol to th polymer composite precursor solution. The polymer composite precursor is filtered from aqueous media of the polymer composite precursor solution. The polymer composite precursor is washed with one or more of second alcohol and acetone. The polymer composite precursor is grinded to average particle size of 2-500 nanometer. The polymer composite precursor is dried to form polymer composite. The nanosheet filler comprises one or more of zirconium hydroxide, zirconium oxide, titanium oxide, graphene oxide, non-functionalized graphene, and hexagonal boron nitride. INDEPENDENT CLAIMS are included for the following: a method for preparing polymer composite hydrogel for water shutoff applications, which involves combining polymer composite with water to form aqueous solution having 0.5 wt.% polymer composite, adding organic cross-linker and salt to the aqueous solution and mixing to form hydrogel precursor solution and heating hydrogel precursor solution to 150-175?oC for 8 hours to gel hydrogel precursor solution and form polymer composite hydrogel; and#a method for forming barrier to shut off or reduce unwanted production of water in subterranean formation, which involves injecting polymer composite hydrogel into one or more water producing fractures in the subterranean formation, polymer composite hydrogel comprises nanosheet filler, dispersing within polymer matrix, nanosheet filler comprises one or more of zirconium hydroxide, zirconium oxide, titanium oxide, graphene oxide, non-functionalized graphene, and hexagonal boron nitride, and polymer matrix comprises polymer formed from polymerization of one or more of acrylamide, acyrlonitrile acid, vinyl alcohol, ethylene terephthalic acid, butylene terephthalic acid, ethylene, isocynates and polyols, and propylene.