Toughening of carbon fiber-reinforced epoxy polymer composites utilizing fiber surface treatment and sizing

Markus A. Downey, Lawrence T. Drzal

Research output: Contribution to journalArticle

  • 2 Citations

Abstract

Toughening of fiber-reinforced epoxy composites while maintaining other mechanical properties represents a significant challenge. This paper presents an approach of enhancing the toughness of a DGEBA/mPDA-based carbon fiber-reinforced epoxy composite, without significantly reducing the static-mechanical properties such as flexural properties and glass transition temperature. The impact of combining an UV-ozone fiber surface treatment with an aromatic and aliphatic epoxy fiber sizing on composite toughness is investigated. Carbon fiber-epoxy adhesion was increased as measured by the single fiber interfacial shear test. The Mode I composite fracture toughness was enhanced by 23% for the UV-ozone fiber surface treatment alone. With the addition of an aromatic and aliphatic fiber sizing, the composite fracture toughness was further increased to 50% and 84% respectively over the as-received, unsized fiber. The increased fiber/matrix adhesion also improved the transverse flexural strength.

Original languageEnglish (US)
Pages (from-to)687-698
Number of pages12
JournalComposites Part A: Applied Science and Manufacturing
Volume90
DOIs
StatePublished - Nov 1 2016
Externally publishedYes

Profile

Fibers
Abnormal Erythrocytes
Composite materials
Carbon fibers
Surface treatment
Toughening
Ozone
Toughness
Fracture toughness
Adhesion
Mechanical properties
Cinchona
Aldicarb
Abdominal Muscles
Immunoglobulin A
Bending strength
Polymers
Enzyme Reactivators
Carbamoyl-Phosphate Synthase (Ammonia)
Intestinal Atresia

Keywords

  • Fiber/matrix bond
  • Fracture toughness
  • Interface/interphase
  • Polymer-matrix composites (PMCs)

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials

Cite this

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abstract = "Toughening of fiber-reinforced epoxy composites while maintaining other mechanical properties represents a significant challenge. This paper presents an approach of enhancing the toughness of a DGEBA/mPDA-based carbon fiber-reinforced epoxy composite, without significantly reducing the static-mechanical properties such as flexural properties and glass transition temperature. The impact of combining an UV-ozone fiber surface treatment with an aromatic and aliphatic epoxy fiber sizing on composite toughness is investigated. Carbon fiber-epoxy adhesion was increased as measured by the single fiber interfacial shear test. The Mode I composite fracture toughness was enhanced by 23% for the UV-ozone fiber surface treatment alone. With the addition of an aromatic and aliphatic fiber sizing, the composite fracture toughness was further increased to 50% and 84% respectively over the as-received, unsized fiber. The increased fiber/matrix adhesion also improved the transverse flexural strength.",
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KW - Polymer-matrix composites (PMCs)

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