Journal of Materials Science

, Volume 50, Issue 8, pp 3258–3266 | Cite as

Mechanical properties and toughness of carbon aerogel/epoxy polymer composites

Original Paper


Because of their nanoporous structure and large surface area, carbon aerogels have high potential for improving the material properties of polymer-based composites. In the present study, the mechanical properties and toughness of epoxy polymers modified with an aerogel content of 0.0–0.5 wt% were considered. Experimental results showed that the stiffness and strength of the carbon aerogel toughened polymers steadily increased with the carbon aerogel content. The glass transition temperature of the unmodified epoxy polymer was 147 °C, and it was not appreciably affected by the addition of carbon aerogels. Blending the carbon aerogels with the epoxy polymer led to an appreciably improvement in the fracture performance of the resulting composites. For example, the fracture energy of the unmodified polymer was 125 J m−2, whereas that of an epoxy polymer reinforced with a carbon aerogel content of 0.3 wt% was 255 J m−2. The mechanisms responsible for the toughness enhancement were identified by studying the fracture surfaces using field emission gun scanning electron microscopy. Crack pinning, crack deflection, interfacial debonding, and plastic void growth were the main toughening mechanisms in the carbon aerogel toughened epoxy polymers.


Fracture Toughness Fracture Energy Silica Nanoparticles Epoxy Polymer Carbon Aerogel 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors would like to thank the National Science Council, Taiwan, for financially supporting this research under a Contract No. NSC-102-2221-E-151-056.


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  • Tsung-Han Hsieh
    • 1
  • Yau-Shian Huang
    • 1
  • Ming-Yuan Shen
    • 2
  1. 1.Department of Mold and Die EngineeringNational Kaohsiung University of Applied SciencesKaohsiung CityTaiwan, ROC
  2. 2.Department of Aviation Mechanical EngineeringChina University of Science and TechnologyHengshan TownshipTaiwan, ROC

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