▎ 摘　　要

NOVELTY - Improving surface biocompatibility of waste polyurethane carrier comprises (i) irradiating the cleaned waste polyurethane by ultraviolet lamp to obtain the first intermediate product; (ii) adding ethylene diamine aqueous solution into the first intermediate product, placing in the reaction kettle, performing the first reaction, and cleaning the first intermediate product after the reacting and drying to obtain the second intermediate product; (iii) improving the solubility of the graphene oxide and dispersibility in the substrate and functionalizing sodium hydroxide and monochloroacetic acid and carboxylating the graphene oxide to obtain carboxylated graphene; (iv) dispersing the carboxylated graphene uniformly in the de-ionized water ultrasonically to prepare carboxylated graphene dispersion; and (v) soaking the second intermediate product in the carboxylated graphene dispersion liquid, placing in the reaction kettle and carrying out the second reaction. USE - The method is useful for improving surface biocompatibility of waste polyurethane carrier. ADVANTAGE - The method: can introduce hydrophilic groups e.g. amide and carboxylic acid on the surface of the modified carrier to improve the hydrophilicity of the carrier thus enhances the biocompatibility of the carrier; is conducive to the immobilization of water treatment microorganisms; produces carrier with an increased specific surface area which promotes the attachment and reproduction of microbial cells on the surface of the carrier to form a biofilm, and shortens the filming process of the carrier; can change the surface group and surface structure of the carrier by simple method, strong thermal stability of the modified carrier and short film hanging time. DESCRIPTION OF DRAWING(S) - The drawing shows the schematic representation of flow diagram of improving surface biocompatibility of waste polyurethane carrier. (Drawing includes non-English language text).