Enhancing fracture toughness of glass/epoxy composites for wind blades using silica nanoparticles and rubber particles

Jia-Lin Tsai*, B. H. Huang, Y. L. Cheng

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

50 Scopus citations


The research aims to investigate the interlaminar fracture toughness of glass fiber/epoxy composites, which consist of the silica nanoparticles and the rubber particles. Two kinds of rubber particles, one is the reactive liquid rubber (CTBN) and the other is the core-shell rubber (CSR), were employed to modify the fracture toughness of epoxy resin. In general, the disadvantage of adding rubber particles into polymeric resin is the dramatic reduction of stiffness although the toughness could be modified accordingly. In order to enhance the fracture toughness of the fiber composites without sacrificing their stiffness, the silica nanoparticles in conjunction with the rubber particles were introduced concurrently into the epoxy matrix to form a hybrid nanocomposite. Experimental results obtained from tensile tests on bulk epoxy confirm the presumption that the reduction of the epoxy stiffness because of the presence of rubber particles can be effectively compensated by the silica nanoparticles. Furthermore, the fracture tests conducted on the DCB specimens revealed that the inclusion of silica nanoparticles together with the CSR particle can appreciably increase the fracture toughness of the glass/epoxy composites up to 82%. On the other hand, when the epoxy matrices were modified with CTBN rubber particles and silica nanoparticles, the improvement of the interlaminar fracture toughness was around 48%.

Original languageEnglish
Pages (from-to)1982-1987
Number of pages6
JournalProcedia Engineering
StatePublished - 25 Oct 2011
Event12th East Asia-Pacific Conference on Structural Engineering and Construction, EASEC12 - Hong Kong, Hong Kong
Duration: 26 Jan 201128 Jan 2011


  • Composites
  • Double cantilever beam (DCB)
  • Fracture Toughness
  • Silica nanoparticles

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