▎ 摘　　要

NOVELTY - Preparing silver nanowires (AgNWs)/reduced graphene oxide (rGO)/thermoplastic polyurethane flexible (TPU) strain sensor involves dissolving polyurethane in the solvent I to obtain the polyurethane solution, then electrostatic spinning the polyurethane solution to obtain the TPU electrostatic spinning film setting the mass ratio of AgNWs and GO to 1:0.125-4, setting hydrazine hydrate and GO to the ratio of 7:10 mass ratio, then adding AgNWs dispersion to the GO dispersion, stirring uniformly to obtain AgNWs/GO mixed dispersion. The GO dispersion liquid is graphene oxide dispersed in the solvent II, the AgNWs dispersion liquid is obtained by dispersing silver nano-wire in solvent III. USE - Method for preparing silvwr nanowires (AgNWs)/reduced graphene oxide (rGO)/thermoplastic polyurethane flexible (TPU) strain sensor used in industrial production, medical device and communication connection field and in modern life and scientific research. ADVANTAGE - The AgNWs/rGO/TPU flexible strain sensor has high durability, wide strain range, high sensitivity, flexible, convenient attached to the surface of each shape object, light weight and strong environment applicability. DETAILED DESCRIPTION - Preparing silver nanowires (AgNWs)/reduced graphene oxide (rGO)/thermoplastic polyurethane flexible (TPU) strain sensor involves dissolving polyurethane in the solvent I to obtain the polyurethane solution, then electrostatic spinning the polyurethane solution to obtain the TPU electrostatic spinning film setting the mass ratio of AgNWs and GO to 1:0.125-4, setting hydrazine hydrate and GO to the ratio of 7:10 mass ratio, then adding AgNWs dispersion to the GO dispersion, stirring uniformly to obtain AgNWs/GO mixed dispersion. The GO dispersion liquid is graphene oxide dispersed in the solvent II, the AgNWs dispersion liquid is obtained by dispersing silver nano-wire in solvent III, mixed the solvent II, ammonia water and hydrazine hydrate, stirred uniformly to obtain the solvent II /ammonium hydrate/hydrazine asteriskhydrate mixed solution, ammonia, volume ratio of GO dispersion used solvent II and the solvent II) is (6-0.5) vol.%, adding the AgNWs/GO mixed dispersion into the mixed solution of solvent II/ammonium hydrate/hydrazine hydrate, performing reduction reaction at the temperature of 90-100degrees Celsius, to reduce GO, the reduction reaction time is 10-30 minutes, standing and cooling to room temperature, then centrifugal solid-liquid separation, solid phase is AgNWs/rGO, dispersing in the solvent III to obtain AgNWs/rGO/ solvent dispersion, the mass fraction of AgNWs/rGO in the AgNWs/rGO/solvent dispersion is 0.1-0.5 wt.%. The AgNWs/rGO/ solvent dispersion is coated on the surface of the TPU electrostatic spinning film, wet film after drying to form a coating layer, the obtained named as AgNWs/rGO/TPU strain sensing material, the AgNWs/rGO/TPU strain sensing material is prepared into AgNWs/rGO/TPU flexible strain sensor