Effect of fiber surface on flexural strength in carbon fabric reinforced epoxy composites

Author(s)

Brocks, Thatiane ^[1] ; Hilario Cioffi, Maria Odila ^[1] ; Cornelis Voorwald, Herman Jacobus ^[1]

Affiliation

^[1] Univ Estadual Paulista, Fatigue & Aeronaut Mat Res Grp, BR-12516410 Guaratingueta - Brazil

• Document type: Journal article
• Source: Applied Surface Science; v. 274, p. 210-216, JUN 1 2013.
• Web of Science Citations: 29

Abstract

The effect of carbon fiber surface characteristics on flexural properties of structural composites is studied in this work. Two types of intermediate modulus carbon fibers were used: T800HB and IM7. Results revealed that higher mechanical properties are linked with higher interfacial adhesion. Morphologies and chemical compositions of commercial carbon fibers (CF) were characterized by Fourier Transformed Infra Red (FTIR) and Scanning Electronic Microscopy (SEM). Comparing the results, the T800HB apparently has more roughness, since the IM7 seems to be recovered for a polymeric film. On other hand, the IM7 one shows higher interactivity with epoxy resin system Cycom 890 RTM. Composites produced with Resin Transfer Molding (RTM) were tested on a flexural trial. Interfacial adhesion difference was showed with SEM and Dynamic Mechanical Analyses (DMA), justifying the higher flexural behavior of composites made with IM7 fibers. (C) 2013 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 06/02121-6 - Composite processing by RTM
• Grantee: Maria Odila Hilário Cioffi
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 09/03284-4 - Structural Composites via RTM for landing gear aplication
• Grantee: Thatiane Brocks
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 09/04123-4 - Development of composites processed by RTM for landing gear components
• Grantee: Marcos Yutaka Shiino
• Support Opportunities: Scholarships in Brazil - Master