Fibers and Polymers

, Volume 14, Issue 5, pp 759–766 | Cite as

Matrix modification with silane coupling agent for carbon fiber reinforced epoxy composites

  • Jinshui Yang
  • Jiayu Xiao
  • Jingcheng Zeng
  • Liping Bian
  • Chaoyi Peng
  • Fubiao Yang
Article
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Abstract

To improve interfacial adhesion between carbon fiber and epoxy resin, the epoxy matrix is modified with N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane (YDH602) and N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (YDH792), respectively. And the effect of matrix modification on the mechanical performance of carbon/epoxy composites is investigated in terms of tensile, flexural and interlaminar properties. The flexural properties indicate that the optimum concentration of silane coupling agents YDH602 and YDH792 for the matrix modification is approximately 0.5 wt% of the epoxy resin system, and the mechanical properties of the YDH792-modified epoxy composites is better than that of the YDH602-modified epoxy composites at the same concentration. Compared to unmodified epoxy composite, the incorporation of 0.5 wt% YDH792 results in an increase of 4, 44 and 42 % in tensile, flexural and interlaminar shear strength (ILSS) values of the carbon/epoxy composite, respectively, while the corresponding enhancement of tensile and flexural modulus is 3 and 15 %. These improvements in mechanical properties can be considered to be an indication of better fiber/matrix interfacial adhesion as confirmed by SEM micrographs of the fracture surface after interlaminar shear testing. The viscosity of the modified epoxy resin system can be reduced by incorporation of silane coupling agent YDH792, which is beneficial for fiber impregnation or wetting during liquid composite molding process.

Keywords

Composites Matrix modification Silane coupling agent Interfacial adhesion 
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Copyright information

© The Korean Fiber Society and Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Jinshui Yang
    • 1
  • Jiayu Xiao
    • 1
  • Jingcheng Zeng
    • 1
  • Liping Bian
    • 1
  • Chaoyi Peng
    • 1
  • Fubiao Yang
    • 1
  1. 1.College of Aerospace and Materials EngineeringNational University of Defense TechnologyChangshaChina

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