▎ 摘　　要

NOVELTY - Enhanced carboxylated graphene modified polyurethane carrier is obtained by grafting three layers of carboxylated graphene on the surface of the polyurethane carrier by using a silane coupling agent as a connecting bridge. USE - Enhanced carboxylated graphene modified polyurethane carrier used in sewage treatment and in microbial curing (claimed). ADVANTAGE - The enhanced carboxylated graphene modified polyurethane carrier has increased specific surface area and surface roughness so the surface adhesion process of microorganisms is improved, and the biological load capacity of the carrier is improved. The carboxylated graphene is used to introduce surface active functional groups such as carboxyl and hydroxyl groups into the polyurethane carrier to improve the hydrophilicity of the modified polyurethane biocarrier. The biocompatibility of the carrier is enhanced, and the development process of the biofilm on the surface of the modified biological carrier is shortened. The modified polyurethane carrier has strong thermal stability.