▎ 摘　　要

NOVELTY - Preparing a bionic high-strength and high-toughness nanocomposite fiber involves preparing 50 mL of a buffer solution having a certain pH value at room temperature. A certain amount of graphene oxide is added, stirred at room temperature, and dispersed ultrasonically, to obtain a brown/brown graphene oxide solution having a mass concentration ranging from 0.01-10 g/L. The 1-100 mg of zirconium oxychloride octahydrate is added to the graphene oxide solution. Then stirred at 25 degrees C for 30 minutes, then the resulting homogeneous solution is heated to 40-90 degrees C, and stirring is continued for 2-6 hours. Then naturally cooled to room temperature, the resulting precipitate is ultrasonically washed, and a shallow/dark brown precipitate is obtained after centrifugation. The precipitate is formulated into a spinning aqueous solution having a certain concentration, and is uniformly dispersed by ultrasonic for 0.5-2 hours. USE - Method for preparing bionic high-strength and high-toughness nanocomposite fiber. ADVANTAGE - The method enables to prepare bionic high-strength and high-toughness nanocomposite fiber, which produces the fiber has high strength and high toughness. DETAILED DESCRIPTION - Preparing a bionic high-strength and high-toughness nanocomposite fiber involves preparing 50 mL of a buffer solution having a certain pH value at room temperature. A certain amount of graphene oxide is added, stirred at room temperature, and dispersed ultrasonically, to obtain a brown/brown graphene oxide solution having a mass concentration ranging from 0.01-10 g/L. The 1-100 mg of zirconium oxychloride octahydrate is added to the graphene oxide solution. Then stirred at 25 degrees C for 30 minutes, then the resulting homogeneous solution is heated to 40-90 degrees C, and stirring is continued for 2-6 hours. Then naturally cooled to room temperature, the resulting precipitate is ultrasonically washed, and a shallow/dark brown precipitate is obtained after centrifugation. The precipitate is formulated into a spinning aqueous solution having a certain concentration, and is uniformly dispersed by ultrasonic for 0.5-2 hours. A coagulation bath solution of the desired alcohol-water system is prepared, and after mixing and ultrasonicizing for 30 minutes, a uniformly mixed coagulation bath solution is obtained. The uniformly mixed coagulation bath solution is placed in the coagulation bath turntable, and rotated at a certain speed until the coagulation bath system is stable. The uniformly dispersed spinning solution is placed in a syringe, and injected into the coagulation bath turntable at a certain rate, and the gel fiber can be obtained after 0.5-24 hours. The gel fiber is subjected to washing, drying and heat treatment to obtain a bionic high-strength and high-toughness nanocomposite fiber.