▎ 摘　　要

NOVELTY - Preparation of titanium nanosheet/graphene-based fiber membrane involves: (A) preparing a pre-stripping dispersion of titanium powder by adding a titanium powder to a pre-stripping dispersion, ultrasonically treating (A), centrifuging and collecting supernatant; (B) preparing a mixture of titanium powder and graphene oxide by adding graphene oxide to the titanium powder dispersion, treating (B), centrifuging, collecting the bottom layer mixture, then dispersing in water, washing and drying; (C) preparing titanium nanosheet/graphene oxide dispersion by dispersing the mixture of titanium powder and graphene oxide in dimethylformamide to prepare a mixture, then treating and concentrating; (D) adding carbon black and a polyacrylonitrile (PAN) powder to the titanium nanosheet/graphene oxide dispersion, stirring, treating to obtain a spinning stock solution, and then electrospinning to prepare titanium nanosheet/graphene oxide hybrid porous fiber membrane; and (E) post-processing. USE - The method is useful for preparing titanium nanosheet/graphene-based fiber membrane (claimed). ADVANTAGE - The method provides titanium nanosheet/graphene-based fiber membrane with large specific surface area and excellent infrared radiation resistance, thermal conductivity, flexibility and bending resistance. DETAILED DESCRIPTION - Preparation of titanium nanosheet/graphene-based fiber membrane involves: (A) preparing a pre-stripping dispersion of titanium powder by adding a titanium powder to a pre-stripping dispersion, subjecting the pre-stripping dispersion with titanium powder to ultrasonic treatment (A) in a water bath at 5-15 degrees C, centrifuging and collecting supernatant; (B) preparing a mixture of titanium powder and graphene oxide by adding graphene oxide to the titanium powder dispersion, carrying out ultrasonic treatment (B) at 5-15 degrees C, centrifuging, collecting the bottom layer mixture, then dispersing in water, washing and drying; (C) preparing titanium nanosheet/graphene oxide dispersion by dispersing the mixture of titanium powder and graphene oxide in dimethylformamide to prepare a mixture, using a pulse probe ultrasound to carry out ultrasonic treatment on the mixture at 5-15 degrees C, and concentrating the mixed solution; (D) spinning by adding carbon black and a polyacrylonitrile (PAN) powder to the titanium nanosheet/graphene oxide dispersion, stirring, performing ultrasonic treatment (C) at 5-15 degrees C to obtain a spinning stock solution, then electrospinning using a spinning needle with a larger inner diameter in the direction of yarn discharge, and collecting to prepare titanium nanosheet/graphene oxide hybrid porous fiber membrane; and (E) post-processing by washing the fiber membrane, drying and reducing. The mass of the graphene oxide is 0.5-5 times the mass of the titanium powder in the titanium powder dispersion. The mass fraction of PAN in the spinning stock solution is 8-12%. The pre-stripping dispersion is isopropanol, deionized water or a mixed solution of isopropanol and deionized water.