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Titre du document / Document title

Aerosol generation and measurement of multi-wall carbon nanotubes

Auteur(s) / Author(s)

Myojo Toshihiko (1) ; Oyabu Takako (1) ; Nishi Kenichiro (1) ; Kadoya Chikara (1) ; Tanaka Isamu (1) ; Ono-Ogasawara Mariko (2) ; Sakae Hirokazu (3) ; Shirai Tadashi (3) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, 807-8555, Kitakyushu, Japan
(2) National Institute of Occupational Safety and Health, Kawasaki, Japan
(3) Tokyo Dylec Co., Tokyo, Japan

Résumé / 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.

Revue / Journal Title

Journal of nanoparticle research    ISSN  1572-896X 

Source / Source

2009, vol. 11, no1, pp. 91-99 [9 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

Springer, Heidelberg, ALLEMAGNE  (2002) (Revue)

Mots-clés d'auteur / Author Keywords

Carbon nanotube

;

Nano-particle

;

Aerosol

;

Multi-walled CNT

;

Aerosol generation

;

Instrumentation

;

Occupational health

;

Environment

;

EHS

;

Localisation / Location

35400060123305.0010

Springer Science+Business Media B.V., 2009
Nº notice refdoc (ud4) : 20909924



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