Effect of dispersant surfactants on the properties of alumina-carbon nanotubes nanocomposites

Inam, Fawad, Heaton, Andrew, Brown, Peter, Peijs, Ton and Reece, Michael (2010) Effect of dispersant surfactants on the properties of alumina-carbon nanotubes nanocomposites. In: 12th International Ceramics Congress, CIMTEC 2010, 6-11 June, 2010, Montecatini Terme, Italy.

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Abstract

Gum Arabic (GA), Sodium Dodecyl Sulfate (SDS) and their mixture were used for the dispersion of multi-wall carbon nanotube (CNT) in an alumina matrix. A good dispersion at low loadings (0.5-1 mass%) of CNTs in alumina was achieved by a bath ultrasonication method. Dispersions were evaluated by UV/vis spectroscopy and agglomerate size analyzer. The mixture of GA and SDS produced good dispersion as compared to GA and SDS alone. Nanocomposite powders were sintered by Spark Plasma Sintering (SPS). Electron microscopic analysis, electrical and mechanical characterizations of sintered discs were carried out to evaluate the effectiveness of the different surfactants. The mixture of GA and SDS produced homogeneously distributed and agglomerate-free CNT-alumina nanocomposites with higher electrical conductivity and indentation fracture toughness as compared to nanocomposites prepared using GA and SDS alone.

Item Type: Conference or Workshop Item (Speech)
Subjects: F200 Materials Science
H300 Mechanical Engineering
J300 Ceramics and Glasses
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Fawad Inam
Date Deposited: 28 May 2013 09:40
Last Modified: 10 Aug 2015 11:24
URI: http://nrl.northumbria.ac.uk/id/eprint/12681

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