Effect of Silica/Graphene Nanohybrid Particles on the Mechanical Properties of Epoxy Coatings

  • Umit Esra Ozcan
  • Fazliye KaraborkEmail author
  • Sakir Yazman
  • Ahmet Akdemir
Research Article - Mechanical Engineering


Epoxy resins are used as coating materials, but the practical use of epoxy coatings in industries is limited due to their weak mechanical properties. In the present paper, different amounts of silica nanoparticles (\(\hbox {SiO}_{2})\) and graphene nanoplatelets (GNPs) were introduced separately and together into an epoxy coating matrix as reinforcements. Graphene, a newly discovered carbon allotrope, has been found to improve the mechanical properties of the polymer composites in which it is dispersed. Silica particles are also known to improve the mechanical properties of composites. In this study, mechanical, physical and thermal properties of the epoxy coatings are considered as multidimensional by the macro- and microanalyses. The experimental results showed that after the addition of GNPs into the epoxy matrix, the flexibility and impact resistance of the coatings increased by 8.3 and 157.1%, respectively, in relation to neat epoxy. The microhardness increased by 53.8% and penetration depth, which is indicative of the scratch resistance, decreased by 29.7%, with the addition of \(\hbox {SiO}_{2}\)–GNPs nanohybrid. A remarkable synergistic effect was observed between the GNPs and \(\hbox {SiO}_{2}\), which improved the hardness and the scratch resistance of the epoxy coatings.


Coatings Nanoparticles Graphene Mechanical properties 


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This work was supported by the Research Fund of Aksaray University. Project Number: 2016-007.


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Copyright information

© King Fahd University of Petroleum & Minerals 2019

Authors and Affiliations

  1. 1.Graduate School of Natural and Applied ScienceAksaray UniversityAksarayTurkey
  2. 2.Department of Mechanical Engineering, Faculty of EngineeringAksaray UniversityAksarayTurkey
  3. 3.Ilgın Vocational SchoolSelcuk UniversityKonyaTurkey
  4. 4.Department of Aircraft Engineering, Faculty of Aviation and Space SciencesNecmettin Erbakan UniversityKonyaTurkey

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