▎ 摘　　要

NOVELTY - Producing (M1) a poly(vinyl alcohol) (PVA)/graphene nanocomposite, comprises: dispersing PVA and graphene nanoplatelets in water to form a mixture, where a mass ratio of PVA to graphene nanoplatelets in the mixture is 50:1-200:1; drying the mixture to produce a film; and exposing the film to a microwave radiation of 100-300 W for 3-20 minutes to form the PVA/graphene nanocomposite. USE - The method (M1) is useful for producing a poly(vinyl alcohol) (PVA)/graphene nanocomposite which is useful as a shielding material on electrical devices to decrease electromagnetic interference. ADVANTAGE - The method (M1): provides the PVA/graphene nanocomposite that exhibits electromagnetic interference shielding effectiveness of 30-50 dB for an electromagnetic radiation of 5.0-12.0 GHz, a peak crystallization temperature of 202-206 degrees C, a melting point of 227-231 degrees C, an electrical conductivity of 0.029-0.05 S/cm (claimed), and improved structural and electrical properties; and utilizes the PVA that is biocompatible, non-toxic, resistant to oil, grease, and solvents and has a high tensile strength and flexibility and exhibits excellent film forming, emulsifying, and adhesive properties. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for producing (M2) a PVA/graphene film, comprising dispersing PVA and graphene nanoplatelets in water to form a mixture, where a mass ratio of poly(vinyl alcohol) to graphene nanoplatelets in the mixture is 80:1-110:1, and drying the mixture to produce the PVA/graphene film, where an electromagnetic interference shielding effectiveness of the PVA/graphene film is 90-140 dB for an electromagnetic radiation of 0.8-2.5 GHz.