▎ 摘　　要

NOVELTY - Processing cold-resistant water pipe comprises e.g. (1) ultrasonically dispersing graphene oxide and deionized water to obtain graphene dispersion, mixing catechol, polyamine and 2-octyldodecylamine, adding Tris-HCl buffer, adjusting pH, adding graphene dispersion, mixing and stirring for 3-6 hours, collecting, filtering, washing and drying to obtain pretreated graphene oxide, (2) stirring pre-treated graphene oxide, phosphorous acid, sodium 2-formylbenzenesulfonate and ethanol, and reacting in an oil bath at 75-80℃ for 6-7 hours, centrifuging collection after reaction, washing with deionized water, and drying to obtain material A, mixing and stirring polyvinylpyrrolidone, ethylene glycol and material A, adding silver nitrate and n-octylamine, stirring, washing and drying with ethanol to obtain material B, mixing and stirring hydroxylated carbon nanotube, material B and anhydrous 1,4-dioxane, adding polyacryl chloride solution and triethylamine, stirring and reacting. USE - The method is useful for processing cold-resistant water pipe, which is useful in polyvinyl chloride water supply pipe, aluminum plastic pipe, and polyethylene random copolymer pipe. ADVANTAGE - The pipe: has good low-temperature resistance, strength, toughness, mechanical property, antibacterial property, high practicability, flame retardant property, and high service life. The method is simple. DETAILED DESCRIPTION - Processing cold-resistant water pipe comprises (1) ultrasonically dispersing graphene oxide and deionized water to obtain graphene dispersion, mixing catechol, polyamine and 2-octyldodecylamine, adding tris-hydrochloride buffer, adjusting pH, adding graphene dispersion, mixing and stirring for 3-6 hours, collecting, filtering, washing and drying to obtain pretreated graphene oxide, (2) stirring pre-treated graphene oxide, phosphorous acid, sodium 2-formylbenzenesulfonate and ethanol, and reacting in an oil bath at 75-80℃ for 6-7 hours, centrifuging collection after reaction, washing with deionized water, and drying to obtain material A, mixing and stirring polyvinylpyrrolidone, ethylene glycol and material A, adding silver nitrate and n-octylamine, stirring, washing and drying with ethanol to obtain material B, mixing and stirring hydroxylated carbon nanotube, material B and anhydrous 1,4-dioxane, adding polyacryl chloride solution and triethylamine, stirring and reacting at 90℃ for 20-24 hours, filtering, washing, and vacuum drying to obtain modified graphene oxide, and (3) mixing and stirring polypropylene, ethylene-octene copolymer, high-density polyethylene, modified graphene oxide, toughening agent and color masterbatch, performing melt extrusion and injection molding to obtain pipes, annealing and water cooling to obtain finished product. An INDEPENDENT CLAIM is also included for a cold-resistant water pipe.