Functionalization of Single-Walled Carbon Nanotubes with Polystyrene via Grafting to and Grafting from Methods

Single-walled carbon nanotubes were functionalized with polystyrene by grafting to and grafting from methods

Shuhui Qin; Dongqi Qin; Warren T. Ford; Daniel E. Resasco; Jose E. Herrera

2007

Scholarcy highlights

  • Single-walled carbon nanotubes were functionalized with polystyrene by grafting to and grafting from methods
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  • Raman and near-IR spectra show that PSt was covalently attached to the sidewalls of SWNT by the grafting to approach, and the degree of functionalization was about 1 in 48 SWNT carbon atoms as determined by thermogravimetric analyses
  • In the grafting from approach, size exclusion chromatography results show that the molecular weight of free St increased linearly with St conversion, and the PSt cleaved from the SWNT after high conversion had the same molecular weight as the PSt produced in solution
  • TGA show that the amount of PSt grafted from the SWNT increased linearly with the molecular weight of the free PSt
  • thermogravimetric analyses show that the amount of PSt grafted from the Single-walled carbon nanotubes increased linearly with the molecular weight of the free PSt. By both methods, the final functionalized SWNT dissolved well in organic solvents, and the original SWNT bundles were broken into very small ropes or even individual tubes as revealed by AFM

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