Re-aggregation of carbon nanotubes in two-component epoxy system

Fawad Inam, Ton Peijs

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

Carbon nanotubes, because of their outstanding features, are one of the potential reinforcements for thermosetting polymers. Among many other processing issues, which need to be solved, re-aggregation of the nanotubes in polymer colloidal mixtures is a major one. Re-aggregation of different nanotubes (single walled, double walled, amino-modified double walled, thin multi walled and COOH-modified thin multi walled) in a two-component epoxy system (liquid epoxy, liquid hardener and a liquid epoxy-hardener mixture) was investigated involving a nano-particle size analyzer. Dispersion characterization of cured samples was carried out using scanning electron microscopy. Re-agglomeration with time was observed in all samples and was found to be least in liquid epoxy compared to liquid hardener and the liquid epoxy-hardener mixture. Along with other processing factors, like curing and degassing, the hardener in the liquid-epoxy mixture was mainly responsible for re-aggregation. Suggestions for altering processing parameters in order to avoid this are discussed.
Original languageEnglish
Pages (from-to)87-95
JournalJournal of Nanostructured Polymers and Nanocomposites
Volume2
Issue number3
Publication statusPublished - Jul 2006

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