This paper gives a brief overview of microstructure and rheology that have been observed for a range of carbon nanotube (CNT) suspensions. In general, untreated CNT suspensions show a much higher level of observable optical microstructure reflecting their preference to aggregate; they also show higher levels of viscoelasticity over treated CNT suspensions. An unexpected Helical Band texture for untreated CNTs is reported together with a series of parallel plate optical observations showing a broad spectrum of behaviour for different shear conditions. Both steady shear and linear viscoelastic data are presented for treated and untreated systems.
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Ma, A.W.K., Mackley, M.R. & Chinesta, F. The microstructure and rheology of carbon nanotube suspensions. Int J Mater Form 1, 75–81 (2008). https://doi.org/10.1007/s12289-008-0375-7
- Carbon nanotube suspensions