Dry coating polymer powder particles with deagglomerated carbon nanotubes to improve their dispersion in nanocomposites

Kwabena A. Narh, Ahmed Tijani Agwedicham, Laila Jallo

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Deagglomerated multi-walled carbon nanotubes (MWCNTs) were dry coated onto the surfaces of polyethylene oxide powder particles by magnetic assisted impact coater (MAIC). The deagglomeration of the tightly agglomerated MWCNTs was carried out using two procedures: rapid expansion of supercritical suspension (RESS) of MWCNTs and CO2, and high-intensity ultrasonic agitation of a suspension of MWCNTs in acetone, using an ultrasonic probe. FESEM images show that the high-intensity ultrasonic probe was more effective in deagglomerating the agglomerated MWCNTs than the RESS method. Furthermore, it was found that the extent of PEO particle surface coverage by MWCNTs greatly depends on the extent of deagglomeration.

Original languageEnglish (US)
Pages (from-to)206-212
Number of pages7
JournalPowder Technology
Volume186
Issue number3
DOIs
StatePublished - Sep 10 2008

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

Keywords

  • Agglomeration
  • Carbon nanotubes
  • Deagglomeration
  • Dry coating

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