▎ 摘　　要

NOVELTY - Method for preparing a flexible strain material capable of simultaneous stretching and compression, involves (i) dissolving 100 parts mass thermoplastic elastomer in solvent, and dispersing 0.001-100 parts mass conductive substance to obtain a dispersion containing the conductive substance, (ii) freezing the dispersion into a solid state, freeze-drying under negative pressure, and sublimating the solvent to obtain a foam material with a porous structure, and (iii) cutting the porous foam material into a certain shape as required, and soaking in the dispersion liquid of the conductive substance to coat the surface with the conductive substance, and drying to obtain the flexible strain material, where the flexible strain material is a conductive foam material with a porous structure and its resistance value can change synchronously with the strain, and the strain comprises tensile strain and compressive strain. USE - The method is used for preparing flexible strain material capable of simultaneous stretching and compression as flexible sensor (claimed) for human activity monitoring, medical diagnosis, man-machine interaction and information encryption. ADVANTAGE - The flexible strain material is capable of stretching and compressing at the same time to improve application performance of the strain sensor, exhibits excellent stretching and compression sensing function, and has excellent rebound resilience, highly stretchable characteristics, excellent elastic recovery characteristics deformation, elongation at break, excellent flexibility, sensing stability, accuracy and high efficiency DETAILED DESCRIPTION - Method for preparing a flexible strain material capable of simultaneous stretching and compression, involves (i) dissolving 100 parts mass thermoplastic elastomer in solvent, and dispersing 0.001-100 parts mass conductive substance to obtain a dispersion containing the conductive substance, (ii) freezing the dispersion into a solid state, freeze-drying under negative pressure, and sublimating the solvent to obtain a foam material with a porous structure, and (iii) cutting the porous foam material into a certain shape as required, and soaking in the dispersion liquid of the conductive substance to coat the surface with the conductive substance, and drying to obtain the flexible strain material, where the dispersion of the conductive substance comprises 100 parts mass solvent, 0.001-10 parts mass conductive substance, and 0-10 parts mass other component comprising surfactant and/or a dispersant, the flexible strain material is a conductive foam material with a porous structure and its resistance value can change synchronously with the strain, and the strain comprises tensile strain and compressive strain. An INDEPENDENT CLAIM is included for a flexible strain material capable of simultaneous stretching and compression obtained by the above method.