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Covalent Attachment of Single Molecules for AFM-based Force Spectroscopy
10:37

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Published on: March 16, 2020

Tailored SWCNT functionalization optimized for compatibility with epoxy matrices.

Y Martinez-Rubi1, J M Gonzalez-Dominguez, A Ansón-Casaos

  • 1National Research Council Canada, 100 Sussex Drive, Ottawa, Ontario, Canada. yadienka.martinez-rubi@nrc-cnrc.gc.ca

Nanotechnology
|June 22, 2012
PubMed
Summary
This summary is machine-generated.

We chemically modified single-walled carbon nanotubes (SWCNTs) to enhance their interaction with epoxy resins. This functionalization improves SWCNT dispersion in composites, leading to potentially better material properties.

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Functionalization of Single-walled Carbon Nanotubes with Thermo-reversible Block Copolymers and Characterization by Small-angle Neutron Scattering

Published on: June 1, 2016

Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Single-walled carbon nanotubes (SWCNTs) offer exceptional properties but suffer from poor dispersion and interfacial adhesion in polymer matrices.
  • Improving the interface between SWCNTs and epoxy resins is crucial for developing advanced composite materials.

Purpose of the Study:

  • To covalently functionalize SWCNTs with epoxy and hardener moieties to improve their compatibility with epoxy matrices.
  • To investigate the effect of functionalization on SWCNT dispersion and properties within epoxy composites.

Main Methods:

  • Chemical modification of SWCNTs using in situ diazonium or carboxylic coupling reactions.
  • Synthesis of SWCNTs bearing amine or epoxide-terminated fragments.
  • Characterization using Raman spectroscopy, FTIR, elemental analysis, and TGA-FTIR.
  • Evaluation of SWCNT dispersion in epoxy using optical microscopy and rheology.

Main Results:

  • Successfully synthesized functionalized SWCNTs with controlled degrees of functionalization and tailored electronic properties.
  • Achieved improved SWCNT dispersion in the epoxy matrix via direct integration, avoiding solvents.
  • Demonstrated that functionalization strategy and fragment molecular weight influence SWCNT properties and dispersion.

Conclusions:

  • Covalent attachment of matrix-similar fragments to SWCNTs enhances their integration into epoxy resins.
  • The developed functionalization approach offers a pathway to improved SWCNT/epoxy composites with preserved thermosetting properties.
  • This method provides control over SWCNT functionalization for optimized composite performance.