Journal ArticleDOI
Impressive Fatigue Life and Fracture Toughness Improvements in Graphene Oxide/Epoxy Composites
TLDR
In this article, the authors report enhancements of 28-111% in mode I fracture toughness and up to 1580% in uniaxial tensile fatigue life through the addition of small amounts (≤1 wt %) of graphene oxide to an epoxy system.Abstract:
Epoxy systems have proven popular having important applications in aerospace and wind energy, but fracture and fatigue resistance of this polymer remain less than desired. Graphene oxide, a form of atomically thin carbon, possessing impressive multifunctional properties and an ideal interface for interacting with polymer matrices, has emerged as a viable reinforcement candidate. In this work, we report enhancements of 28–111% in mode I fracture toughness and up to 1580% in uniaxial tensile fatigue life through the addition of small amounts (≤1 wt %) of graphene oxide to an epoxy system. Graphene oxide was uniquely synthesized by unraveling and splaying open helical-ribbon carbon nanofibers. The resulting oxygenated basal planes and edges of the graphene oxide sheets were observed to promote onset of the cross-linking reaction and led to an increase in total heat of reaction effecting slightly higher glass transition temperatures of the cured composites. Measured improvements were also detected in quasi-st...read more
Citations
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Journal ArticleDOI
Mechanical properties of graphene and graphene-based nanocomposites
TL;DR: In this paper, the current status of the intrinsic mechanical properties of the graphene-family of materials along with the preparation and properties of bulk graphene-based nanocomposites is thoroughly examined.
Journal ArticleDOI
The mechanics of graphene nanocomposites: A review
TL;DR: In this paper, the preparation and characterisation of different forms of graphene are reviewed and different techniques that have been employed to prepare graphene such as mechanical and solution exfoliation, and chemical vapour deposition are discussed briefly.
Journal ArticleDOI
Grafting of epoxy chains onto graphene oxide for epoxy composites with improved mechanical and thermal properties
Yan Jun Wan,Long-Cheng Tang,Li Xiu Gong,Dong Yan,Yi Bao Li,Lian Bin Wu,Jian Xiong Jiang,Guo Qiao Lai +7 more
TL;DR: In this paper, the surface functionalization of DGEBA layer was found to effectively improve the compatibility and dispersion of GO sheets in epoxy matrix, and increased glass transition temperature and thermal stability was also observed in the dynamic mechanical properties and thermo-gravimetric analysis.
Journal ArticleDOI
Reinforcing effects of graphene oxide on portland cement paste
Kai Gong,Zhu Pan,Asghar Habibnejad Korayem,Ling Qiu,Dan Li,Francis Gerard Collins,Chien Ming Wang,Wenhui Duan +7 more
TL;DR: In this paper, the reinforcing effects of graphene oxide (GO) on portland cement paste are investigated, and it is discovered that the introduction of 0.03% by weight GO sheets into the cement paste can increase the compressive strength and tensile strength of the cement composite by more than 40%.
Journal ArticleDOI
Improving the fracture toughness and the strength of epoxy using nanomaterials – a review of the current status
Nadiim Domun,Homayoun Hadavinia,Tao Zhang,Toby Sainsbury,Gholam Hossain Liaghat,Samireh Vahid +5 more
TL;DR: A large variety of data comprised of the mechanical properties of nanomaterial toughened composites reported to date has been compiled to facilitate the evolution of this emerging field, and the results are presented in maps showing the effect of nanoparticle loading on mode I fracture toughness, stiffness and strength.
References
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Journal ArticleDOI
Electric Field Effect in Atomically Thin Carbon Films
Kostya S. Novoselov,Andre K. Geim,Sergey V. Morozov,Da Jiang,Y. Zhang,S. V. Dubonos,Irina V. Grigorieva,A. A. Firsov +7 more
TL;DR: Monocrystalline graphitic films are found to be a two-dimensional semimetal with a tiny overlap between valence and conductance bands and they exhibit a strong ambipolar electric field effect.
Journal ArticleDOI
Measurement of the Elastic Properties and Intrinsic Strength of Monolayer Graphene
TL;DR: Graphene is established as the strongest material ever measured, and atomically perfect nanoscale materials can be mechanically tested to deformations well beyond the linear regime.
Journal ArticleDOI
Superior Thermal Conductivity of Single-Layer Graphene
Alexander A. Balandin,Suchismita Ghosh,Wenzhong Bao,Irene Calizo,Desalegne Teweldebrhan,Feng Miao,Chun Ning Lau +6 more
TL;DR: The extremely high value of the thermal conductivity suggests that graphene can outperform carbon nanotubes in heat conduction and establishes graphene as an excellent material for thermal management.
Journal ArticleDOI
Graphene-based composite materials
Sasha Stankovich,Dmitriy A. Dikin,Geoffrey Dommett,K. Kohlhaas,Eric Zimney,Eric A. Stach,Richard D. Piner,SonBinh T. Nguyen,Rodney S. Ruoff +8 more
TL;DR: The bottom-up chemical approach of tuning the graphene sheet properties provides a path to a broad new class of graphene-based materials and their use in a variety of applications.