Effects of dispersion surfactants on the properties of ceramic – carbon nanotube (CNT) nanocomposites

Inam, Fawad, Heaton, Andrew, Brown, Peter, Peijs, Ton and Reece, Michael (2014) Effects of dispersion surfactants on the properties of ceramic – carbon nanotube (CNT) nanocomposites. Ceramics International, 40 (1). pp. 511-516. ISSN 0272-8842

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Official URL: http://dx.doi.org/10.1016/j.ceramint.2013.06.031

Abstract

Gum Arabic (GA), Sodium Dodecyl Sulfate (SDS) and their mixture were used for the dispersion of multi-walled carbon nanotubes (CNTs) in an alumina matrix. A good dispersion at low loadings (0.5-1 wt%) of CNTs in alumina was achieved by an ultrasonic bath treatment. Dispersions were evaluated by UV-vis spectroscopy and agglomerate size analysis. 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). Microstructural, electrical and mechanical characterizations of sintered discs were carried out to evaluate the effectiveness of the different dispersants. The mixture of GA and SDS produced homogeneous 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: Article
Uncontrolled Keywords: Carbon nanotubes, ceramic-matrix composites (CMCs), electrical properties, fracture toughness, sintering
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: 10 Dec 2013 13:41
Last Modified: 08 May 2017 11:18
URI: http://nrl.northumbria.ac.uk/id/eprint/14764

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