Comparison of chemical vapor deposition and chemical grafting for improving the mechanical properties of carbon fiber/epoxy composites with multi-wall carbon nanotubes

Huaiping Rong, Klaus Hermann Dahmen, Hamid Garmestani, Muhuo Yu, Karl I. Jacob

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

By engineering the fiber/matrix interface, the properties of the composite can be changed significantly. In this work, we increased the effective surface area of the fiber/matrix interface, to facilitate additional stress transfer between fibers and matrix, by grafting carbon nanotubes on to carbon fibers (in the form of carbon fabric) by two different methods: (1) chemical vapor deposition (CVD) method and (2) a purely chemical method. With the CVD process, carbon nanotubes (CNT) were directly grown on carbon fiber substrate using chemical vapors. For the chemical method, CNT with carboxyl groups were grafted on functionalized carbon fiber via a chemical reaction. The morphology of CNT/carbon fibers was examined by scanning electron microscope (SEM) which revealed uniform coverage of carbon fibers with CNT in both of CVD method and chemical grafting method. CNT-grafted woven carbon fibers were used to make carbon/epoxy composites, and their mechanical properties were measured using three-point bending and tension tests which showed that those with CNT-grafted carbon fiber reinforcements using the CVD process has 11 % higher tensile strength compared to those containing carbon fibers modified with the chemical method. Also, composites with CNT-grafted carbon fibers with chemical method showed 20 % higher tensile strength compared to composites with unmodified carbon fibers. The results of tensile test revealed that both CVD and chemical grafting could significantly improve the mechanical properties of the carbon fiber composites.

Original languageEnglish
Pages (from-to)4834-4842
Number of pages9
JournalJournal of Materials Science
Volume48
Issue number14
DOIs
Publication statusPublished - 1 Jul 2013
Externally publishedYes

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Carbon Nanotubes
Carbon fibers
Chemical vapor deposition
Carbon nanotubes
Mechanical properties
Composite materials
Fibers
carbon fiber
Tensile strength
Carbon
Fiber reinforced materials
Chemical reactions
Electron microscopes
Vapors

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Comparison of chemical vapor deposition and chemical grafting for improving the mechanical properties of carbon fiber/epoxy composites with multi-wall carbon nanotubes. / Rong, Huaiping; Dahmen, Klaus Hermann; Garmestani, Hamid; Yu, Muhuo; Jacob, Karl I.

In: Journal of Materials Science, Vol. 48, No. 14, 01.07.2013, p. 4834-4842.

Research output: Contribution to journalArticle

Rong, Huaiping ; Dahmen, Klaus Hermann ; Garmestani, Hamid ; Yu, Muhuo ; Jacob, Karl I. / Comparison of chemical vapor deposition and chemical grafting for improving the mechanical properties of carbon fiber/epoxy composites with multi-wall carbon nanotubes. In: Journal of Materials Science. 2013 ; Vol. 48, No. 14. pp. 4834-4842.
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