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Polymer Bulletin

, Volume 76, Issue 1, pp 259–270 | Cite as

Glass fiber-reinforced epoxy composite with surface-modified graphene oxide: enhancement of interlaminar fracture toughness and thermo-mechanical performance

  • Alireza AshoriEmail author
  • Mehdi Ghiyasi
  • Akram Fallah
Original Paper
  • 98 Downloads

Abstract

This paper presents an experimental study of using graphene oxide (GO) and modified GO to improve the interlaminar fracture and thermo-mechanical properties of glass fiber/epoxy composites. First, GO nanoplatelets were synthesized and then chemically modified using dodecylamin (DA-GO) and 1-(3-aminopropyl) imidazole (IL-GO) to improve their dispersion in the matrix and to reinforce epoxy adhesive. Each composite laminate was fabricated with six layers of glass fiber using the hand lay-up method and using 0.5 wt% GO or functionalized GOs (FGOs) content. Dynamic mechanical thermal analysis was performed in three-point bending mode. The viscoelastic properties of all the composites have been further evaluated in the temperature range of 30–120 °C. The experimental results of double cantilever beam tests demonstrated that, with the addition of GO, DA-GO and IL-GO, the Mode-I force-displacement curves of the specimen increased by 7.5, 28.3 and 11.8%, respectively, compared to those of the control specimen. Like the GO, the DA-GO- and IL-GO-filled composites exhibited a rising R-curve, which was a sign of GO or FGO bridging and other toughening mechanisms such as crack pinning and bowing. It is remarkable to note that the maximum increase in Mode-I interlaminar fracture toughness and crack resistance were for the composite containing DA-GO nanoparticles. Dynamic mechanical analysis results showed that improvement in storage modulus and enhancement in the glass transition temperature of the composite have been achieved with the incorporation of only 0.5 wt% of DA-GO into the GE composite. Thermo-gravimetric analysis showed that the degradation temperatures shifted to higher values after using GO and FGO nanoparticles.

Keywords

Functionalized graphene oxide Glass fiber Epoxy Thermo-mechanical properties 

Notes

Acknowledgements

Financial support from Iran National Science Foundation (INSF) (No. 95813954) is gratefully acknowledged.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Chemical TechnologiesIranian Research Organization for Science and Technology (IROST)TehranIran
  2. 2.Department of Mechanical EngineeringIran University of Science and Technology (IUST)TehranIran

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