Materials Transactions, Vol.51 No.01 (2010) pp.192-195
© 2010 The Japan Institute of Metals

Dispersion and Shortening of Multi-Walled Carbon Nanotubes by Size Modification

Byung-Koog Jang and Yoshio Sakka

The shortening of multi-walled carbon nanotubes (CNTs) was achieved by size-reduction treatment using shear force. Special atomizing unit with double diamond disks under a higher forwarding speed of CNTs suspension was used to obtain a high shear force and to break the entangled CNTs. Tangled pristine CNTs can be shortened below 200 nm by the introduction of shear stress during repetitive size-reduction treatment. CNTs that have undergone size-reduction treatment show a lower optical transmittance than that of the original untreated CNTs, resulting in the well dispersion in aqueous suspension.

(Received 2009/8/4; Accepted 2009/10/9; Published 2009/12/25)

Keywords: carbon nanotubes, size reduction, dispersion, optical transmittance, microstructure

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