▎ 摘　　要

NOVELTY - Preparing flexible sensing material involves (i) dispersing cationic cellulose nanomaterial in deionized water, performing mechanical stirring or ultrasonic treatment to obtain a cationic dispersant system, dispersing anionic cellulose nanomaterial in deionized water, and subjecting to mechanical stirring or ultrasonic treatment to obtain an anionic dispersant system, (ii) adding carbon nanotube/graphene to the cationic dispersant system, mechanically stirring or ultrasonically treating to prepare carbon nanotube/graphene aqueous dispersion (a) stabilized by cationic dispersant, adding carbon nanotube/graphene to the anionic dispersant system, and stirring or treating to prepare a carbon nanotube/graphene aqueous dispersion (b) stabilized by anionic dispersant, and (iii) placing the carbon nanotube/graphene dispersion (a) and (b) respectively in the same container to form a contact or non-contact interface, bringing the interface together, extracting, quickly drying, and winding. USE - The method is useful for preparing flexible sensing material as strain sensing material (claimed) and resistive strain sensor. ADVANTAGE - The conductive wire has a diameter of 25-100 mu m, a tensile strength of 35-100 MPa, and a conductivity of 150-4000 second/m. The sensing material has obvious response to current/resistance changes, low detection limit and excellent fatigue stability. DETAILED DESCRIPTION - Method for preparing flexible sensing material involves (i) dispersing cationic cellulose nanomaterial in deionized water to obtain an aqueous dispersion of cationic cellulose nanomaterial, performing mechanical stirring or ultrasonic treatment to obtain a cationic dispersant system, dispersing anionic cellulose nanomaterial in deionized water, and subjecting to mechanical stirring or ultrasonic treatment to obtain an anionic dispersant system, (ii) adding carbon nanotubes/graphene to the cationic dispersant system, mechanically stirring or ultrasonically treating to prepare carbon nanotube/graphene aqueous dispersion (a) stabilized by cationic dispersant, adding carbon nanotubes/graphene to the anionic dispersant system, and mechanically stirring or ultrasonically treating to prepare a carbon nanotube/graphene aqueous dispersion (b) stabilized by anionic dispersant, and (iii) placing the carbon nanotube/graphene dispersion (a) and (b) respectively in the same container to form a contact or non-contact interface, bringing the interface between the carbon nanotube/graphene dispersion (a) and (b) together, extracting the solid-like anion-cation complex formed instantly, quickly drying the water in the spun conductive wire, and winding the wire on a reel to prepare conductive wire. An INDEPENDENT CLAIM is included for the use of the flexible sensing material prepared by the method as a strain sensing material.