Influence of Centrifugation Time and Force on Monodispersion of MWCNTs Aqueous Solution

Abstract:

Achieving the monodispersion of Multi-walled carbon nanotubes (MWCNTs) is a challenging work for CNTs application. Centrifugation as a standard procedure was employed to remove remaining large bundles and leaving primarily individual nanotubes and small bundles in the supernatant. The optimum centrifugation time and force were 30min and 12×10³g, respectively , which were determined by UV-vis absorbance, transmission electron microscopy (TEM), Zeta potential and the residual MWCNTs concentration after centrifugation. Through centrifugation treatments, the uniform and stable MWCNTs monodispersion can be obtained and the Zeta potential was as high as-53.8mv after one month. The film formed from optimized MWCNTs monodispersed solution is smooth and flexible.

• Periodical: Applied Mechanics and Materials (Volumes 365-366)
• Pages: 1122-1127
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.365-366.1122
• Online since: August 2013
• Authors: Shao Wei Lu, Xian Jun Zeng, Peng Nie, Chun Xu Zhang
• Keywords: Centrifugation, Monodisperse, MWCNT

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