▎ 摘　　要

NOVELTY - Lightweight high-strength carbon fiber graphene plastic tube comprises (i) carbon fiber prepared by placing cellulose nanofibers in tubular furnace, passing protective gas; (ii) carbon fiber intercalated graphene composite material is prepared by dispersing cellulose nanofibers in aqueous solution, treating dispersion by ultrasonic crusher, where an ice water bath is required, adding hydrazinium hydroxide to obtained dispersion of cellulose nanofibers and graphene oxide, stirring,dispersing uniformly, using ammonium hydroxide to adjust pH of system to 10, stirring for 5-10 minutes, sealing the reaction system, washing with distilled water to neutrality by dialysis and freeze-drying; (iii) weighing polyvinyl chloride and carbon fiber, placing carbon fiber intercalated graphene composite material into a high speed mixer; and (iv) extrusion molding by adding uniformly mixed material obtained, vacuum sizing, cooling down, tracting annealing, cutting and packaging. USE - Used as lightweight high-strength carbon fiber graphene plastic tube. ADVANTAGE - The tube is easy to operate, has high performance quality, can be used in water supply, drainage systems, heating piping systems and gas delivery systems. DETAILED DESCRIPTION - Lightweight high-strength carbon fiber graphene plastic tube comprises (i) the carbon fiber prepared by placing cellulose nanofibers in a tubular furnace, passing the protective gas, raising the temperature to 300-500 degrees C at a increase rate of 2-5 degrees C/minute and keeping it for 1-3 hours, again raising the temperature at 700-1000 degrees C at a temperature increase rate of 5-10 degrees C/min and kept at 0.5-2 hours and lowering to room temperature at a drop rate of 5-10 degrees C/minute; (ii) carbon fiber intercalated graphene composite material is prepared by dispersing cellulose nanofibers in an aqueous solution to prepare a 1wt.% dispersion, treating the dispersion by an ultrasonic crusher with a power of 1200-1500 W for 60-120 minutes, where an ice water bath is required to control the temperature of the dispersion at 20-30 degrees C, adding a graphene oxide solution having a molar concentration of 1 to 2 mmol/l to the dispersion, stirring mechanically on a normal temperature and pressure magnetic stirrer for 10-20 minutes, treating by an ultrasonic crusher with a power of 1500-1800W for 30-60 minutes, adding hydrazinium hydroxide to the obtained dispersion of cellulose nanofibers and graphene oxide, stirring and dispersing uniformly, using ammonium hydroxide to adjust the pH of the system to 10, stirring for 5-10 minutes, sealing the reaction system, heating to 85-90 degrees C for 60-120 minutes, washing with distilled water to neutrality by dialysis and freeze-drying, placing the obtained cellulose nanofiber intercalated graphene composite material into a tubular furnace, passing in protective gas, raising temperature to 700-1000 degrees C at a increase rate of 5-10 degrees C/minutes and keeping for 1-2 hours, lowering to room temperature at a drop rate of 5-10 degrees C/minutes; (iii) weighing polyvinyl chloride and carbon fiber, placing the carbon fiber intercalated graphene composite material into a high speed mixer, mixing uniformly, adding the modified calcium carbonate, acrylate, zinc stearate, antioxidants, lubricants and stabilizers and mixing uniformly; and (iv) extrusion molding is carried out by adding the uniformly mixed material obtained in step (iii) to the twin-screw extruder by extruding, vacuum sizing, cooling down, tracting annealing, cutting and packaging.