Synergistic effect of multi walled carbon nanotubes and reduced graphene oxides in natural rubber for sensing application

Ponnamma,D, Sadasivuni,KK, Strankowski,M, Guo,Q and Thomas,S 2013, Synergistic effect of multi walled carbon nanotubes and reduced graphene oxides in natural rubber for sensing application, Soft matter, vol. 9, no. 43, pp. 10343-10353, doi: 10.1039/c3sm51978c.

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Title Synergistic effect of multi walled carbon nanotubes and reduced graphene oxides in natural rubber for sensing application
Author(s) Ponnamma,D
Guo,QORCID iD for Guo,Q
Journal name Soft matter
Volume number 9
Issue number 43
Start page 10343
End page 10353
Total pages 11
Publisher Royal Society of Chemistry
Place of publication Cambridge, Eng.
Publication date 2013
ISSN 1744-683X
Keyword(s) Science & Technology
Physical Sciences
Chemistry, Physical
Materials Science, Multidisciplinary
Physics, Multidisciplinary
Polymer Science
Materials Science
Summary Utilizing the electrical properties of polymer nanocomposites is an important strategy to develop high performance solvent sensors. Here we report the synergistic effect of multi walled carbon nanotubes (MWCNTs) and reduced graphene oxide (RGO) in regulating the sensitivity of the naturally occurring elastomer, natural rubber (NR). Composites were fabricated by dispersing CNTs alone and together with exfoliated RGO sheets (thermally reduced at temperatures of 200 and 600 °C) in NR by a solution blending method. RGO exfoliation and the uniform distribution of fillers in the composites were studied by atomic force microscopy, Fourier transformation infrared spectroscopy, X-ray diffraction, transmission electron microscopy and Raman spectroscopy. The solvent sensitivity of the composite samples was noted from the sudden variation in electrical conductivity which was due to the breakdown of the filler networks during swelling in different solvents. It was found that the synergy between CNTs and RGO exfoliated at 200 °C imparts maximum sensitivity to NR in recognizing the usually used aromatic laboratory solvents. Mechanical and dynamic mechanical studies reveal efficient filler reinforcement, depending strongly on the nature of filler-elastomer interactions and supports the sensing mechanism. Such interactions were quantitatively determined using the Maier and Göritz model from Payne effect experiments. It is concluded that the polarity induced by RGO addition reduces the interactions between CNTs and ultimately results in the solvent sensitivity. © 2013 The Royal Society of Chemistry.
Language eng
DOI 10.1039/c3sm51978c
Field of Research 091209 Polymers and Plastics
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2013, Royal Society of Chemistry
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Document type: Journal Article
Collection: Institute for Frontier Materials
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