Single-walled carbon nanotube/silicone rubber composites for compliant electrodes

Tae Ann Kim, Hee Suk Kim, Sang-Soo Lee, Min Park

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

Single-walled carbon nanotube (SWCNT)/silicone rubber composites that can be used in fabricating compliant electrodes are prepared by spraying a mixed solution of ionic-liquid-based SWCNT gel and silicone rubber onto an elastic substrate. Subsequently, the composites are exposed to nitric acid vapor. Scanning electron microscopy and atomic force microscopy images of the composites show that the SWCNTs are finely dispersed in the polymer matrix due to the addition of the ionic liquid. Doping of the SWCNTs by nitric acid can significantly lower the sheet resistance (Rs) of the composites; samples with 4 wt% of SWCNT content exhibit the lowest Rs value (50 Ω sq-1). This sheet resistance corresponds to a conductivity value of 63 S cm-1. In addition, the composites retain a high conductivity after several tensile strains are applied. Stretching the composite sample to 300% of the original length increased the Rs value to 320 Ω sq-1 (19 S cm-1). Even after 20th stretch/release/stretch cycle, the conductivity remains constant at a value of 18 S cm-1. These results provide a scalable route for preparing highly stretchable and conductive SWCNT composites with relatively low SWCNT concentrations.

Original languageEnglish
Pages (from-to)444-449
Number of pages6
JournalCarbon
Volume50
Issue number2
DOIs
Publication statusPublished - 2012 Feb 1

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Silicone Elastomers
Single-walled carbon nanotubes (SWCN)
Electrodes
Composite materials
Nitric Acid
Ionic Liquids
Sheet resistance
Tensile strain
Spraying
Polymer matrix
Stretching
Atomic force microscopy
Gels
Vapors
Doping (additives)
Scanning electron microscopy
Substrates

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Single-walled carbon nanotube/silicone rubber composites for compliant electrodes. / Kim, Tae Ann; Kim, Hee Suk; Lee, Sang-Soo; Park, Min.

In: Carbon, Vol. 50, No. 2, 01.02.2012, p. 444-449.

Research output: Contribution to journalArticle

Kim, Tae Ann ; Kim, Hee Suk ; Lee, Sang-Soo ; Park, Min. / Single-walled carbon nanotube/silicone rubber composites for compliant electrodes. In: Carbon. 2012 ; Vol. 50, No. 2. pp. 444-449.
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