Synthesis of pyrene-capped polystyrene for dispersion of pristine single-walled carbon nanotubes

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

  • Yehai Yan - , Qingdao University of Science and Technology (Autor:in)
  • Shaobei Yang - , Qingdao University of Science and Technology (Autor:in)
  • Jian Cui - (Autor:in)
  • Lothar Jakisch - , Leibniz Institute of Polymer Research Dresden (Autor:in)
  • Petra Poetschke - , Leibniz Institute of Polymer Research Dresden (Autor:in)
  • Brigitte Voit - , Leibniz Institute of Polymer Research Dresden (Autor:in)

Abstract

Pyrene-capped polystyrene (PyPS) with various molecular weights ((M) over bar (n)) was synthesized through the anionic polymerization method and characterized using UV, Fourier transform infrared and NMR spectroscopy and gel permeation chromatography. The polymers were then used for non-covalent functionalization of pristine single-walled carbon nanotubes (SWNTs). The functionalization efficiency was assessed by measuring the SWNT dispersibility in chloroform. In the presence of PyPS, the dispersibility can be as high as 372.5 mg L(-1), and the dispersions containing more than 1.25 mg mL(-1) of PyPS are very stable with no solid deposits observed after being centrifuged at 5000 rpm for 15 min. Once the PyPS concentration is converted to the molar concentration of the pyrene unit and the dispersibility redefined as nanotube content per molar pyrene unit, the renewed dispersibility is found to be independent of (M) over bar (n) of PyPS within the detected (M) over bar (n) range. For a certain PyPS polymer, however, both nanotube dispersibility and dispersion stability are strongly dependent on the PyPS concentration. These results suggest that PyPS may be used as an excellent dispersant for subsequent preparation of polystyrene/SWNT composites. (C) 2011 Society of Chemical Industry

Details

OriginalspracheEnglisch
Seiten (von - bis)1425-1433
Seitenumfang9
FachzeitschriftPolymer international
Jahrgang60
Ausgabenummer10
PublikationsstatusVeröffentlicht - Okt. 2011
Peer-Review-StatusJa
Extern publiziertJa

Externe IDs

Scopus 80052883084
ORCID /0000-0002-4531-691X/work/148607845

Schlagworte

Schlagwörter

  • Anionic polymerization, Dispersion, Pyrene-capped polystyrene, Single-walled carbon nanotubes