Ultrastable fluoropolymer-based porous conductive elastomer composites (PVDF–HFP/CB) for high-sensitivity pressure sensing applications

Abstract

Flexible pressure sensors necessitate a broad detection range and high sensitivity to ensure adaptability across diverse application scenarios and reliable signal acquisition. However, existing piezoresistive sensors with ultra-wide detection ranges face challenges in balancing sensing performance, structural thickness, and manufacturing costs. Herein, a flexible pressure sensor based on a polyvinylidene fluoride hexafluoropropylene (PVDF–HFP) fluoropolymer as the polymer framework was proposed. Consequently, the fabricated device achieved an extended pressure response range (0–400 kPa) with a maximum sensitivity of 1.40 kPa⁻¹, while maintaining rapid response/recovery characteristics (11.3 ms/11.9 ms). Additionally, the device showed good dynamic response performance and maintained mechanical and electrical stability over more than 10 000 testing cycles. The sensor also maintained stable electrical and mechanical performance across a range of temperatures (0–150 °C), further confirming its high-temperature resistance. This work presents a viable pathway for enhancing the performance of flexible pressure sensors, advancing their potential for commercialization.