A Capacitive Pressure Sensor with Linearity and High Sensitivity over a Wide Pressure Range using Thermoplastic Microspheres

A flexible pressure sensor with a linear response over wide range high sensitivity is extremely desirable for high-pressure applications, such as monitoring body weight and plantar distributions. As promising candidate to achieve the sensitivity, porous structure in capacitive sensors essential. However, this invokes early saturation of owing low compression modulus. In study, thermoplastic microspheres (TPM) materials are utilized, demonstrate solution-processed simple that highly sensitive (3.1 × 10−3 kPa−1) (1 MPa) linearity (R2 = 0.996). The TPM-containing responds within 100 ms can withstand 10 000 times cyclic test under 150 kPa. may be attributed rigid characteristics membrane. These results show has sufficient reduce need complex system calibrations potential applications distribution monitoring.