Tailored SWCNT functionalization optimized for compatibility with epoxy matrices

Download
  1. Get@NRC: Tailored SWCNT functionalization optimized for compatibility with epoxy matrices (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1088/0957-4484/23/28/285701
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleNanotechnology
ISSN0957-4484
Volume23
Issue28
Article number285701
SubjectArc-discharge method; Characterization techniques; Chemical functionalization; Coupling reaction; Direct integration; Epoxy matrices; FTIR; Interface interaction; Rheology measurement; Chemical bonds; Electronic properties; Functional groups; Molecular weight; Oligomers; Optical microscopy; Thermogravimetric analysis; Thermosets; Fourier transform infrared spectroscopy
AbstractWe have modified single walled carbon nanotubes (SWCNTs) with well defined matrix-based architectures to improve interface interaction in SWCNT/epoxy composites. The hardener and two pre-synthesized oligomers containing epoxy and hardener moieties were covalently attached to the SWCNT walls by insitu diazonium or carboxylic coupling reactions. In this way, SWCNTs bearing amine or epoxide-terminated fragments of different molecular weights, which resemble the chemical structure of the cured resin, were synthesized. A combination of characterization techniques such as Raman and infrared absorption (FTIR) spectroscopy, elemental analysis and coupled thermogravimetry-FTIR spectroscopy were used to identify both the functional groups and degree of functionalization of SWCNTs synthesized by the laser ablation and arc-discharge methods. Depending on the type of reaction employed for the chemical functionalization and the molecular weight of the attached fragment, it was possible to control the degree of functionalization and the electronic properties of the functionalized SWCNTs. Improved dispersion of SWCNTs in the epoxy matrix was achieved by direct integration without using solvents, as observed from optical microscopy and rheology measurements of the SWCNT/epoxy mixtures. Composite materials using these fillers are expected to exhibit improved properties while preserving the thermosetting architecture. © 2012 IOP Publishing Ltd.
Publication date
LanguageEnglish
AffiliationSecurity and Disruptive Technologies; National Research Council Canada
Peer reviewedYes
NPARC number21270147
Export citationExport as RIS
Report a correctionReport a correction
Record identifier82023bc6-06ea-403c-a1d0-5bda8c05622e
Record created2014-01-06
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)