Ultra-Wide Range Pressure Sensor Based on a Microstructured Conductive Nanocomposite for Wearable Workout Monitoring

Yongrok Jeong, Jimin Gu, Jaiyeul Byun, Junseong Ahn, Jaebum Byun, Kyuyoung Kim, Jaeho Park, Jiwoo Ko, Jun-Ho Jeong, Morteza Amjadi, Inkyu Park

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Conventional flexible pressure sensors are not suitable for high-pressure applications due to their low saturation pressure. In this study, an ultra-wide range pressure sensor is designed based on the optimized microstructure of the polyimide/carbon nanotubes (PI/CNT) nanocomposite film. The sensing range of the pressure sensor is expanded by adopting polyimide (PI) with a high elastic modulus as a matrix material and its sensitivity is improved through functional sensing film with tip-flattened microdome arrays. As a result, the pressure sensor can measure a wide pressure range (≈ 0-3000 kPa) and possesses the sensitivity of ≈ 5.66 × 10-3 -0.23 × 10-3 kPa-1 with high reliability and durability up to 1000 cycles. The proposed sensor is integrated into the hand and foot pressure monitoring systems for workout monitoring. The representative values of the pressure distribution in the hands and feet during the powerlifting are acquired and analyzed through Pearson's correlation coefficient (PCC). The analyzed results suggest that the pressure sensor can provide useful real-time information for healthcare and sports performance monitoring.

Original languageEnglish
Article number2001461
JournalAdvanced Healthcare Materials
Volume10
Issue number9
Early online date10 Mar 2021
DOIs
Publication statusPublished - 5 May 2021

Keywords

  • contact resistance
  • healthcare pressure
  • resistive pressure sensors
  • wide pressure range
  • workout pressure

ASJC Scopus subject areas

  • Biomaterials
  • Biomedical Engineering
  • Pharmaceutical Science

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