Polypyrrole-coated conductive fabrics as a candidate for strain sensors

Li, Y.; Leung, M. Y.; Tao, Xiaoming; Cheng, Xiaoxiang; Tsang, J.; Yuen, Marcus Chun Wah

doi:10.1007/s10853-005-0791-8

Cited by 42 publications

(32 citation statements)

References 8 publications

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“…We believe that this initial increase corresponds to the cracking seen in Figure 6 and reported by Li et al for Lycra fabric with a coating of polypyrrole [13,14]. Subsequently our samples show a cyclic change in resistance with strain.…”

Section: Resultssupporting

confidence: 83%

Conducting Polymer and Conducting Composite Strain Sensors on Textiles

Calvert

Duggal

Patra

et al. 2008

Molecular Crystals and Liquid Crystals

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Metallic connections and polymer sensors have been printed onto textiles as a step toward the production of flexible printed electronics. We show that the strain response of conducting polymers and composites on woven textiles depends on the detailed distribution the sensor material on the yarn. The structure of most textiles, with strong fibers twisted into yarns, can provide a support which allows electronic materials, impregnated into the yarn, to stretch and bend without breaking.

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Section: Resultssupporting

confidence: 83%

Conducting Polymer and Conducting Composite Strain Sensors on Textiles

Calvert

Duggal

Patra

et al. 2008

Molecular Crystals and Liquid Crystals

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show abstract

“…We believe that this initial increase corresponds to the cracking seen in figure 4 and reported by Li et al for Lycra fabric with a coating of polypyrrole [12,13]. Subsequently our samples show a cyclic change in resistance with strain.…”

Section: Strain Sensitivitysupporting

confidence: 83%

Piezoresistive sensors for smart textiles

Calvert

Patra

et al. 2007

Electroactive Polymer Actuators and Devices (EAPAD) 2007

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We have used inkjet printing to deposit silver conducting lines and small PEDOT (conducting polymer) sensors onto fabrics. The printed conductors penetrate into the fabric and can be shown to coat the individual fibers within the yarn, through the full thickness of the cloth. The PEDOT sensor has a resistance in the region of a few kilo-ohms and is connected to measuring equipment by printed silver lines with a resistance of a few ohms. In this way, local strains can be measured at different sites on a fabric. The PEDOT responds to a tensile strain by a reduction in resistance with a gauge factor (change in resistance/strain) from -5 to -20. This compares with conventional strain gauges where the gauge factor is normally +2. These sensors cycle to strains of over 10%. We have measured gauge factors as a function of the orientation of the sensing line to the fabric axes, to the strain axes for different fabric structures. We can correlate the gauge factor with the extent to which the twisted multifilament yarns are expected to become laterally compressed. In preliminary tests we have shown that these printed sensors can be used to monitor knee and wrist motions and so could be used to provide information in applications such as rehabilitation from joint damage.

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“…The relatively lower reaction temperature (i.e. 18-20 C) was crucial, which gave rise to the slower polymerization process compared with that at the room temperature (28 AE 2 C) [12,15]. Moreover, the substituent affects the coupling of pyrrole species from two aspects, including the steric effect and the electronic effect [16].…”

Section: Formation Mechanism Of Omdppmentioning

confidence: 99%