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

Fawad Inam, Andrew Heaton, Peter Brown, Ton Peijs, Michael Reece

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)
2 Downloads (Pure)

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.
Original languageEnglish
Pages (from-to)511-516
JournalCeramics International
Volume40
Issue number1
Early online date17 Jun 2013
DOIs
Publication statusPublished - Jan 2014

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