Effect of carbon nanotube pre-treatment on dispersion and electrical properties of melt mixed multi-walled carbon nanotubes/poly(methyl methacrylate) composites

Ki Park Won, Hyun Kim Jung, Sang Soo Lee, Junkyung Kim, Geon Woong Lee, Min Park

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)

Abstract

Multi-walled carbon nanotubes (MWNTs) pre-treated by concentrated mixed acid or oxidized at high temperature were melt mixed with poly(methyl methacrylate) (PMMA) using a twin screw extruder. The morphologies and electrical properties of the MWNT/PMMA composites were investigated. The thermally treated MWNTs (t-MWNTs) were well dispersed, whereas the acid treated MWNTs (a-MWNTs) were highly entangled, forming large-sized clusters. The resulting electrical properties of the composites were analyzed in terms of the carbon nanotube (CNT) dispersion. The experimental percolation threshold was estimated to be 3 wt% of t-MWNTs, but no percolation occurred at similar concentrations in the a-MWNT composites, due to the poor dispersion in the matrix.

Original languageEnglish
Pages (from-to)206-211
Number of pages6
JournalMacromolecular Research
Volume13
Issue number3
Publication statusPublished - 2005 Jun

Keywords

  • Acid treatment
  • CNT/polymer composites
  • Carbon nanotubes
  • Electrical conductivity
  • Melt mixing
  • Thermal treatment

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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