▎ 摘　　要

NOVELTY - Preparing graphene composite material flexible strain sensor comprises (i) mixing and stirring the liquid silicone rubber and ethanol uniformly, heating, solidifying and volatilizing the ethanol to obtain solid porous silicone rubber, where the mass-volume ratio of liquid silicone rubber to ethanol is 20:2-5 g/ml; (ii) soaking the solid porous silicon rubber in the organic chemical solution for surface modification treatment and forming micro-nano structure on the solid porous silicon rubber surface to obtain the modified solid porous silicone rubber, the organic chemical solution is petroleum ether; (iii) placing the solid porous silicon rubber in the graphene solution, stirring, forming conductive sensitive layer using graphene and obtaining the graphene/solid porous silicon rubber composite material; and (iv) connecting graphene/solid porous silicon rubber composite material two ends with wires. USE - The graphene composite material flexible strain sensor is useful in flexible wear-resistant devices for motion monitoring. ADVANTAGE - The method: can form folds and bumps and other micro-nano structures on flexible Ecoflex substrate; produces flexible strain sensor with high specific surface area, adsorption capacity of the flexible matrix to the conductive material, the large strain capacity, rapid response speed and good fatigue resistance; and is simple, economical and easy. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for graphene composite material flexible strain sensor, prepared as mentioned above.