Mechanical properties of multiwall carbon nanotube-Epoxy composites

E. Vajaiac, S. Palade, A. Pantazi, A. Stefan, G. Pelin, D. Baran, C. Ban, M. Purica, V. Meltzer, E. Pincu, C. Berbecaru*, D. Dragoman

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Composites containing epoxy resin and functionalized multiwall carbon nanotubes with different mass concentrations were preparedby ultrasonic homogenization followed by curing at room temperature. Mechanical characterizations of composites reveal a general improvement of the flexural strength at tensile stress and Young’smodulus at low concentrations of nanotubes, the enhancement of mechanical properties compared to pure epoxy resin being observed for carbon nanotube concentrations up to 4 wt. %. The tensile strength at tensile stress decreases slowly with increasing the concentration of nanotubes. Numerical simulations of flexural behavior agree with experimental data for a lower-than-unity polymerization degree, the un-completed curing process hypothesisbeing also supported by electrical measurements. Electrical measurements reveala strong decrease of the resistivity of the composites with the MWCNT content with no reproducible values above room temperature in heating-cooling cycles.

Original languageEnglish (US)
Pages (from-to)359-369
Number of pages11
JournalDigest Journal of Nanomaterials and Biostructures
Volume10
Issue number2
StatePublished - Jan 1 2015

Keywords

  • Carbon nanotubes
  • Epoxy resin composites
  • Mechanical and electrical properties
  • Raman and calorimetric investigations

ASJC Scopus subject areas

  • Structural Biology
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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