▎ 摘　　要

NOVELTY - The preparation of polydimethylsiloxane/graphene flexible composite film involves (1) mixing precursor of polydimethylsiloxane and curing agent with non-polar organic solvent, mechanically agitating to obtain homogeneously mixed solution, where the amount of non-polar organic solvent is equal to the mass of precursor of polydimethylsiloxane, (2) adding 3-4 wt.% graphene to the homogeneously mixed solution and dispersing graphene uniformly in the solution to obtain a mixed slurry, (3) pouring the mixed slurry on the plate and spreading the mixed slurry evenly on the surface of the plate, (4) curing the mixed slurry coated on the surface of the flat plate and peeling off from the flat plate. USE - Preparation of polydimethylsiloxane/graphene flexible composite film (claimed) used for wearable device, sensor, stealth cloak and flexible electronic device. ADVANTAGE - The method enables large-scale preparation of polydimethylsiloxane/graphene flexible composite film ensuring negative dielectric constant by simple, economical and easy process.