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Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets
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Strain Sensing Based on Multiscale Composite Materials Reinforced with Graphene Nanoplatelets

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Graphene nanoribbon composites.

Mohammad A Rafiee1, Wei Lu, Abhay V Thomas

  • 1Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA.

ACS Nano
|November 18, 2010
PubMed
Summary
This summary is machine-generated.

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Unzipping multiwalled carbon nanotubes into graphene nanoribbons significantly enhances epoxy composite strength. This cost-effective method improves mechanical properties, rivaling expensive single-walled carbon nanotube composites.

Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Pristine multiwalled carbon nanotubes (MWCNTs) provide limited structural reinforcement in epoxy composites due to poor interfacial contact, wetting, and intertube slip.
  • These limitations hinder effective load transfer, restricting the application of MWCNTs as high-performance composite additives.

Purpose of the Study:

  • To investigate the potential of unzipping MWCNTs into graphene nanoribbons (GNRs) to improve mechanical properties of epoxy composites.
  • To compare the performance of GNR-reinforced epoxy composites with MWCNT-reinforced counterparts.

Main Methods:

  • Multiwalled carbon nanotubes were unzipped to form graphene nanoribbons.
  • Graphene nanoribbons and multiwalled carbon nanotubes were incorporated into epoxy-based composites at approximately 0.3% weight fraction.

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  • Mechanical properties, including Young's modulus and ultimate tensile strength, were evaluated.

    • Main Results:

    • Epoxy composites reinforced with graphene nanoribbons exhibited a significant improvement in Young's modulus (approximately 30% increase) compared to those with multiwalled carbon nanotubes.
    • Ultimate tensile strength also showed a notable enhancement (approximately 22% increase) in graphene nanoribbon composites relative to multiwalled carbon nanotube composites at the same filler fraction.
    • The results indicate enhanced load transfer effectiveness in graphene nanoribbon-reinforced composites.

    Conclusions:

    • Unzipping multiwalled carbon nanotubes into graphene nanoribbons offers a viable strategy for superior mechanical reinforcement in epoxy composites.
    • Graphene nanoribbons present a cost-effective alternative to single-walled carbon nanotubes for achieving high-performance composite materials.
    • This approach unlocks the potential of MWCNTs as effective additives for enhancing composite mechanical properties.