Journal of Nanoparticle Research

, Volume 11, Issue 1, pp 91–99

Aerosol generation and measurement of multi-wall carbon nanotubes

  • Toshihiko Myojo
  • Takako Oyabu
  • Kenichiro Nishi
  • Chikara Kadoya
  • Isamu Tanaka
  • Mariko Ono-Ogasawara
  • Hirokazu Sakae
  • Tadashi Shirai
Nanoparticles and Occupational Health

DOI: 10.1007/s11051-008-9450-8

Cite this article as:
Myojo, T., Oyabu, T., Nishi, K. et al. J Nanopart Res (2009) 11: 91. doi:10.1007/s11051-008-9450-8
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Abstract

Mass production of some kinds of carbon nanotubes (CNT) is now imminent, but little is known about the risk associated with their exposure. It is important to assess the propensity of the CNT to release particles into air for its risk assessment. In this study, we conducted aerosolization of a multi-walled CNT (MWCNT) to assess several aerosol measuring instruments. A Palas RBG-1000 aerosol generator applied mechanical stress to the MWCNT by a rotating brush at feed rates ranging from 2 to 20 mm/h, which the MWCNT was fed to a two-component fluidized bed. The fluidized bed aerosol generator was used to disperse the MWCNT aerosol once more. We monitored the generated MWCNT aerosol concentrations based on number, area, and mass using a condensation particle counter and nanoparticle surface area monitor. Also we quantified carbon mass in MWCNT aerosol samples by a carbon monitor. The shape of aerosolized MWCNT fibers was observed by a scanning electron microscope (SEM). The MWCNT was well dispersed by our system. We found isolated MWCNT fibers in the aerosols by SEM and the count median lengths of MWCNT fibers were 4–6 μm. The MWCNT was quantified by the carbon monitor with a modified condition based on the NIOSH analytical manual. The MWCNT aerosol concentration (EC mass base) was 4 mg/m3 at 2 mm/h in this study.

Keywords

Carbon nanotubeNano-particleAerosolMulti-walled CNTAerosol generationInstrumentationOccupational healthEnvironmentEHS

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Toshihiko Myojo
    • 1
  • Takako Oyabu
    • 1
  • Kenichiro Nishi
    • 1
  • Chikara Kadoya
    • 1
  • Isamu Tanaka
    • 1
  • Mariko Ono-Ogasawara
    • 2
  • Hirokazu Sakae
    • 3
  • Tadashi Shirai
    • 3
  1. 1.Institute of Industrial Ecological SciencesUniversity of Occupational and Environmental HealthKitakyushuJapan
  2. 2.National Institute of Occupational Safety and HealthKawasakiJapan
  3. 3.Tokyo Dylec Co.TokyoJapan