From sewing thread to sensor: Nylon® fiber strain and pressure sensors

Yarjan Abdul Samad, Kento Komatsu, Daiji Yamashita, Yuanqing Li, Lianxi Zheng, Saeed M. Alhassan, Yoshiaki Nakano, Kin Liao

Research output: Contribution to journalArticlepeer-review

62 Scopus citations

Abstract

Some of the most advanced laptop computers have their trackpads made to detect both force and position precisely. These trackpads are made of intricately designed force sensors, taptic engines and capacitive glass surfaces. In this study, we have modified simple Nylon® fabric which senses both force and position. A commercially available Nylon® fabric was coated with reduced graphene (rGO) in a layer by layer fashion such that the individual fibers of the fabric get wrapped by rGO and the fabric looks like dyed with grey color. The SEM images of the twisted individual rGO coated fibers show that the coating remains undamaged until a twist angle of about 1800°. An in situ applied pressure in compression, on the fabric, of about 2500 kPa changes its resistance 8 kΩ relative to its original resistance with a durability of up to 6000 cycles. Single rGO coated fibers quarantined and tested for their strain sensitivity show that an in situ bending radius of 1 mm changes its resistance to 326 ± 21 kΩ relative to its original resistance. With the help of a read-out circuit it was also showed that quarantined rGO coated fibers arranged in a 2 × 2 grid format sense the position of the applied force.

Original languageBritish English
Pages (from-to)1083-1090
Number of pages8
JournalSensors and Actuators, B: Chemical
Volume240
DOIs
StatePublished - 1 Mar 2017

Keywords

  • Coating
  • E-textile
  • Graphene oxide
  • Pressure sensing
  • Strain sensing
  • Tactile sensing

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