▎ 摘　　要

Sensors that detect resistance changes are generally representative of pressure sensors, and piezo-resistive sensors have recently been studied in various ways to recognize various changing environments. Our research used thermoplastic polyurethane (TPU) as a raw material to create a 3D-printed auxetic lattice structure. Here, the truss and honeycomb structures with positive Poisson's ratios for regular lattice structures, chiral truss and re-entrant structures with negative Poisson's ratios for auxetic lattice structures, were studied and characterized. By coating graphene, each structure is designed to detect a change in resistance. The auxetic structures manufactured have excellent strength and detect electrical conductivity, allowing them to be used as piezo-resistive sensors with constant resistance changes at given compression. Castor-oil-based waterborne polyurethane (CWPU)/graphene-coated auxetic sensors suggest potential applications for multifunction piezo-resistive sensors under compressed deformation.