▎ 摘　　要

NOVELTY - Method for preparing flexible three-dimensional graphene aerogel, involves mixing graphene oxide liquid crystal with an anionic surfactant solution and performing reconstruction to obtain a reconstructed graphene oxide solution, subjecting the reconstructed graphene oxide solution to hydrothermal self-assembly to obtain a graphene oxide hydrogel, and vacuum freeze-drying the graphene oxide hydrogel to obtain the flexible three-dimensional graphene aerogel. USE - The method is used for preparing flexible three-dimensional graphene aerogel in piezoresistive sensor for detecting fingertip pulse (all claimed). ADVANTAGE - The piezoresistive sensor solves the problem of weak fingertip pulse detection in medicine, and has excellent piezoresistive performance and practicability. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a flexible three-dimensional graphene aerogel prepared by the above method, where the height of the flexible three-dimensional graphene aerogel is on the order of centimeters, and the graphene sheets in the flexible three-dimensional graphene aerogel are arranged in a long-range order; and (2) a flexible three-dimensional graphene-based piezoresistive sensor is prepared by slicing the flexible three-dimensional graphene aerogel, applying silver paste on both sides of the obtained three-dimensional graphene aerogel, connecting two copper wires as upper and lower electrodes respectively, using a mixture of transparent flexible polymer and curing agent for encapsulation, and curing to obtain the flexible three-dimensional graphene-based piezoresistive sensor.