▎ 摘　　要

NOVELTY - Preparation of a high-elasticity radiation-resistant nanofiber aerogel material involves uniformly mixing ethyl orthosilicate, phosphoric acid and water to obtain a mixed solution, obtaining a hydrolyzed solution, adding a titanium dioxide nano-powder to the hydrolyzed solution, ultrasonically treating to obtain a composite hydrolyzate, uniformly mixing a polyvinyl alcohol aqueous solution and composite hydrolyzate with water and stirring to obtain a precursor solution, electrospinning using the precursor solution to obtain a hybrid nanofiber membrane, heat-treating the hybrid nanofiber membrane, naturally cooling, adding the hybrid nanofiber membrane, ethyl orthosilicate, boric acid and aluminum chloride to water to obtain a to-be-dispersed liquid, adding a graphene oxide solution to the to-be-dispersed liquid and stirring at high speed to obtain a homogeneous dispersion, freezing and freeze-drying the homogeneous dispersion to obtain a nanofiber aerogel material, and post-treating. USE - Preparation of high-elasticity radiation-resistant nanofiber aerogel material. ADVANTAGE - The method produces high-elasticity radiation-resistant nanofiber aerogel material having high elasticity and excellent radiation resistance, temperature resistance and high-temperature heat-insulation performance. DETAILED DESCRIPTION - Preparation of a high-elasticity radiation-resistant nanofiber aerogel material involves uniformly mixing ethyl orthosilicate, phosphoric acid and water to obtain a mixed solution, stirring the mixed solution for 1-24 hours to obtain a hydrolyzed solution, adding a titanium dioxide nano-powder to the hydrolyzed solution, stirring for 1-12 hours, ultrasonically treating for 0.5-2 hours to obtain a composite hydrolyzate, uniformly mixing a polyvinyl alcohol aqueous solution and composite hydrolyzate with water and stirring for 1-12 hours to obtain a precursor solution, electrospinning using the precursor solution as an electrospinning solution to obtain a hybrid nanofiber membrane, heat-treating the hybrid nanofiber membrane under inert atmosphere at 300-600degrees Celsius for 1-10 hours and at 600-900degrees Celsius for 1-5 hours, naturally cooling to room temperature, adding the hybrid nanofiber membrane, ethyl orthosilicate, boric acid and aluminum chloride to water to obtain a to-be-dispersed liquid, adding a graphene oxide solution to the to-be-dispersed liquid and stirring at high speed to obtain a homogeneous dispersion, freezing and freeze-drying the homogeneous dispersion to obtain a nanofiber aerogel material, and post-treating the nanofiber aerogel material under inert atmosphere.