Nanoscale structure and local mechanical properties of fiber-reinforced composites containing MWCNT-grafted hybrid glass fibers

Charles D. Wood, Marc J. Palmeri, Karl W. Putz, Gregory Ho, Rick Barto, L. Catherine Brinson*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

Carbon nanotubes (CNTs) were grown from the surface of glass fibers by chemical vapor deposition, and these hybrid fibers were individually dispersed in an epoxy matrix to investigate the local composite structure and properties near the fiber surface. High-resolution transmission electron microscopy revealed the influence of infiltration and curing of a liquid epoxy precursor on the morphology of the CNT " forest" region, or region of high CNT density near the fiber surface. Subsequent image analysis highlighted the importance of spatially dependent volume fractions of CNTs in the matrix as a function of distance from the fiber surface, and nanoindentation was used to probe local mechanical properties in the CNT forest region, showing strong correlations between local stiffness and volume fraction. This work represents the first in situ measurements of local mechanical properties of the nano-structured matrix region in hybrid fiber-reinforced composites, providing a means of quantifying the reinforcement provided by the grafted nanofillers.

Original languageEnglish (US)
Pages (from-to)1705-1710
Number of pages6
JournalComposites Science and Technology
Volume72
Issue number14
DOIs
StatePublished - Sep 17 2012

Keywords

  • A. Carbon nanotubes
  • A. Hybrid composites
  • B. Mechanical properties
  • Nanoindentation

ASJC Scopus subject areas

  • Ceramics and Composites
  • Engineering(all)

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