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2013 | 11 | 6 | 945-952
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Synthesis and gas-sensing properties of phenylhydrazine-functionalized single wall carbon nanotubes in polymer matrix

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Gas sensor material was prepared by encapsulation of functionalized single-walled carbon nanotubes (SWCNT) into a gas-permeable polymer poly(1-trimethylsilyl-1-propyne) (PTMSP). A phenylhydrazino group was used for the functionalization of SWCNTs to improve their solubility and compatibility with polymers. Syntheses were carried out in aqueous surfactant solutions and in pure phenylhydrazine without surfactant. Two different temperatures (24 and 50°C) and two surfactants (sodium dodecyl sulfate and tricaprylmethylammonium chloride - Aliquat®336) were compared. Functionalized SWCNTs were characterized by X-ray photoelectron (XPS), Raman and Fourier transform infrared (FTIR) spectroscopy. Analyses showed that the synthesis at higher temperature in pure phenylhydrazine resulted in the highest functionalization yield. Phenylhydrazine itself proved to be a good solvent for SWCNTs. The functionalized nanotubes were soluble in organic solvents that under the same conditions were appropriate solvents for polymers. The sensitivity of functionalized SWCNT-PTMSP thin film composite to NO2 gas at room temperature was significantly higher than that of the similar sensor material containing the pristine SWCNTs. [...]
Physical description
1 - 6 - 2013
28 - 3 - 2013
  • Institute of Physics, Faculty of Science and Technology, University of Tartu, 51014, Tartu, Estonia
  • Institute of Physics, Faculty of Science and Technology, University of Tartu, 51014, Tartu, Estonia
  • Institute of Physics, Faculty of Science and Technology, University of Tartu, 51014, Tartu, Estonia
  • Institute of Chemistry, Faculty of Science and Technology, University of Tartu, 50411, Tartu, Estonia
  • Institute of Physics, Faculty of Science and Technology, University of Tartu, 51014, Tartu, Estonia
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