Non-oxidized graphene/elastomer composite films for wearable strain and pressure sensors with ultra-high flexibility and sensitivity

Qingshi Meng, Zhiwen Liu, Rui Cai, Shaowei Lu, Tianqing Liu

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

It remains challenging to prepare wearable strain and pressure sensors with excellent mechanical properties, ultra-high flexibility and sensitivity. Electrically conductive graphene platelets (GnPs) with high structural integrity are used in making a composite film fabricated using robust fabrication techniques. The gauge factor for the strain is up to 100 at 0-5% strain and 50 at 5%-30% strain, and the sensitivity to pressure is 2.7×10-2 kPa-1 between 0-10 kPa and 1.5×10-4 kPa-1 between 300-1000 kPa. In addition, the flexible sensor demonstrates good repeatability and durability after 1000 cycles of tensile and compression tests. The flexible sensor has fast response ability and a wide operating temperature range, suggesting the excellent response to temperature. The flexible sensor is applied in monitoring several human motions as a wearable device with high accuracy. The ability to detect strain, pressure and temperature of the flexible sensor extends its applications to multifunctional wearable devices.
Original languageEnglish
Pages (from-to)214-225
Number of pages12
JournalPolymers for Advanced Technologies
Volume31
Issue number2
Early online date12 Nov 2019
DOIs
Publication statusPublished - Feb 2020

Keywords

  • Graphene
  • Composite films
  • Flexible conductor

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