Incorporation of silicon dioxide nanoparticles at the carbon fiber-epoxy matrix interphase and its effect on composite mechanical properties

Wenzhen Qin, Frederic Vautard, Per Askeland, Junrong Yu, Lawrence T. Drzal

Research output: Research - peer-reviewArticle

Abstract

Functionalized silicon dioxide nanoparticles (nano-fSiO2) were uniformly deposited on the surface of carbon fibers (CFs) using a coating process which consisted of immersing the fibers directly in a suspension of nano-fSiO2 particles and epoxy monomers in 1-methyl-2-pyrrolidinone (NMP). The 0° flexural properties, 90° flexural properties, and Interlaminar shear strength (ILSS) mechanical properties of unidirectional epoxy composites made with nano-fSiO2+epoxy sized carbon fibers, with control fibers, and with epoxy-only sized fibers were measured and compared. An obvious increase of the fiber/matrix adherence strength was obtained with the nano-fSiO2+epoxy coating. The nano-fSiO2+epoxy sized CF/epoxy composites showed a relative increase of 15%, 50%, and 22% in comparison to control fibers, for the Interlaminar shear strength, the 90° flexural strength and the 90° flexural modulus, respectively but little e difference was measured between the different systems for the 0° flexural properties. The observation of the fracture surfaces by scanning electron microscopy of composite fracture confirmed the improvement of the interfacially dependent mechanical properties.

LanguageEnglish (US)
JournalPolymer Composites
DOIs
StateAccepted/In press - 2015

Profile

Silicon Dioxide
Nanoparticles
Mechanical properties
Fibers
Composite materials
carbon fiber
Carbon fibers
Silica
Shear strength
Coatings
1-methyl-2-pyrrolidinone
Bending strength
Suspensions
Monomers
Scanning electron microscopy

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry
  • Ceramics and Composites
  • Chemistry(all)

Cite this

Incorporation of silicon dioxide nanoparticles at the carbon fiber-epoxy matrix interphase and its effect on composite mechanical properties. / Qin, Wenzhen; Vautard, Frederic; Askeland, Per; Yu, Junrong; Drzal, Lawrence T.

In: Polymer Composites, 2015.

Research output: Research - peer-reviewArticle

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AU - Drzal,Lawrence T.

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