▎ 摘　　要

NOVELTY - Preparation of graphene/thermoplastic polyurethane elastomer composite material-based strain sensor involves (S1) freezing and drying graphene dispersion at temperature of -60℃ for 48 hours to obtain graphene aerogel, and crushing to obtain graphene aerogel fragments, (S2) adding N,N-dimethylformamide in thermoplastic polyurethane elastomer, and ultrasonically dispersing and dissolving for 30 minutes to obtain N,N-dimethylformamide solution, (S3) dissolving graphene aerogel fragments in tetrahydrofuran, and ultrasonically dispersing for 30 minutes to obtain graphene/tetrahydrofuran solution, (S4) mixing thermoplastic polyurethane elastomer/N,N-dimethylformamide solution and graphene/tetrahydrofuran solution, and ultrasonically dispersing for 5 minutes to obtain mixed dispersion, (S5) clamping two ends of polydimethylsiloxane membrane using a clamp, stretching by 5%, dripping mixed dispersion liquid, and drying for 30 minutes at temperature of 80℃. USE - Preparation of graphene/thermoplastic polyurethane elastomer composite material-based strain sensor. ADVANTAGE - The graphene/thermoplastic polyurethane elastomer composite material-based strain sensor prepared by the method exhibits subtle sensing ability under external force stimulation, ensuring high repeatability, and high stability strain sensing characteristics.