Highly sensitive and wearable capacitive pressure sensors based on PVDF/BaTiO3 composite fibers on PDMS microcylindrical structures

Chii Rong Yang, Ming Feng Lin, Chun Kai Huang, Wei Chia Huang, Shih Feng Tseng*, Hsin Han Chiang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

Abstract

This study developed a novel high-sensitivity flexible capacitive pressure sensor by combining BaTiO3-doped polyvinylidene fluoride electrospinning fibers and polydimethylsiloxane microcylindrical structures as the dielectric layer. The flexible electrode formed by the graphene/PI film was assembled into a flexible capacitive pressure sensor, and formed a sandwich-like structure. The proposed sensor could obtain more capacitance variations and improve its sensitivity through composite deformation of electrospinning fiber and microcylindrical structure under pressure. The developed flexible capacitive pressure sensor has a high sensitivity of 5 kPa−1, fast response and release time of 25 and 50 ms, ultralow detection limit of 0.11 Pa, and more than 10000- and 5000-times compressions/bending cycling test without any signal attenuation for the high durability and high reliability. The results of this study proved that the sensors have excellent performance, and can be applied on wearable devices for human pulse monitoring and acoustic detection.

Original languageEnglish
Article number111817
JournalMeasurement: Journal of the International Measurement Confederation
Volume202
DOIs
Publication statusPublished - 2022 Oct

Keywords

  • Electronic skin system
  • Electrospinning fiber
  • Flexible capacitive pressure sensor
  • Human-machine collaboration
  • Microcylindrical structure

ASJC Scopus subject areas

  • Instrumentation
  • Electrical and Electronic Engineering

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