Perylene quaternary ammonium salt-graphene composite antibacterial agent and preparation method thereof

The invention relates to the field of graphene, and discloses a perylene quaternary ammonium salt-graphene composite antibacterial agent and a preparation method thereof.The perylene quaternary ammonium salt-graphene composite antibacterial agent comprises graphene and a perylene tetracarboxylic acid diimide derivative fixed to the surface of the graphene through the pi-pi conjugation effect, the alkane is grafted on the perylene tetracarboxylic acid diimide derivative and contains a quaternary ammonium salt functional group; the preparation method comprises the following steps: mixing and grinding a perylene tetracarboxylic diimide derivative, a graphite derivative and an alkaline compound, then adding a quaternization modifier, and continuously grinding, washing, filtering and drying to obtain the perylene quaternary ammonium salt-graphene composite antibacterial agent. The perylene quaternary ammonium salt-graphene antibacterial agent prepared by the invention integrates the advantages of perylene derivati