▎ 摘　　要

NOVELTY - The coaxial electrospinning preparation method of graphene/silica nanocomposite fiber involves dissolving certain amount of graphene precursor in a single solvent or mixed solvent, and ultrasonically treating to obtain graphene precursor dispersion, dissolving polymer in a single solvent or a mixed solvent to obtain a polymer solution, mixing graphene precursor dispersion and polymer solution, stirring to obtain outer layer spinning fluid. USE - Coaxial electrospinning preparation of graphene/silica nanocomposite fiber (claimed). ADVANTAGE - The method enables coaxial electrospinning of graphene/silica nanocomposite fiber easily by simple process in a controlled manner, and reduces the generation of heat, and fatigue. DETAILED DESCRIPTION - The coaxial electrospinning preparation method of graphene/silica nanocomposite fiber involves (i) dissolving certain amount of graphene precursor in a single solvent or mixed solvent, and ultrasonically treating to obtain 0.01 mg-10 g/ml dispersion which is graphene precursor dispersion, dissolving polymer in a single solvent or a mixed solvent in a ratio of (0.01-60):1 to obtain a polymer solution, mixing graphene precursor dispersion and polymer solution, stirring for 0.1-48 hours to obtain outer layer spinning fluid, (ii) uniformly mixing 0.1-100 g silica precursor, 0.1-80 g anhydrous ethanol, and 0.1-50 g acidic aqueous solution to obtain a silica precursor fluid, dissolving the polymer in a single solvent or a mixed solvent in a ratio of (0.01-60):1 to obtain a polymer solution, uniformly mixing silica precursor fluid and polymer solution, and stirring for 0.1-48 hours to obtain an inner layer spinning solution, (iii) placing outer layer spinning liquid and inner layer spinning liquid in electrostatic spinning device with spinning head of sleeve structure in a ratio of (0.01-100):1, where the inner diameter of the inner layer spinning device is set to 0.1-5 mm, the inner layer spinning solution flow rate is set to 0.1-60 ml/hour, the inner diameter of the outer layer spinning solution is set to 0.2-6 mm, the outer solution flow rate is set to 0.1-60 ml/hour, spinning voltage is 1-80 kV, and receiving distance is 0.1-200 cm, and spinning at 0-00 degrees C under air humidity of 1-90% to obtain graphene/silica nanocomposite precursor fiber membrane, (iv) placing the graphene/silica nanocomposite precursor fiber membrane in a high temperature furnace, drying at 70-150 degrees C for 0.1-24 hours, heating in an inert atmosphere at 150-700 degrees C at a rate of 0.1-50 degrees C/minute, heat preserving for 0.1-16 hours, heating at 700-1200 degrees C at a rate of 0.1-50 degrees C/minute, and calcining for 0.1-12 hours.