Tunable Large‐Scale Compressive Strain Sensor Based on Carbon Nanotube/Polydimethylsiloxane Foam Composites by Additive Manufacturing

The compressive strain sensor is an extensively used flexible electronic device because of its capability to convert mechanical deformation electrical signal. However, the difficulty in tuning performance limits further applications. Herein, approach fabricating a carbon nanotube (CNT)/polydimethylsiloxane (PDMS) sensor, which has both tunable and performances, presented. CNT plays role reinforcement due outstanding strength conductivity. PDMS widely matrix softness nontoxicity. material extrusion 3D printing method fabricate composites, advantages design flexibility compatibility with liquid-based materials. foam microstructure formed by removing sodium chloride provides large-scale at least 50% excellent elasticity. works durably over 10 000 cycles, gauge factor (GF) 17.4. detecting large- small-scale human motions tunability CNT/PDMS composites also tested.