Effects of nanomaterials on the mechanical properties of epoxy hybrid composites

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Effects of nanomaterials on the mechanical properties of epoxy hybrid composites Ömer Faruk Erkendirci1 · Ahmet Avcı2 Received: 29 January 2020 / Accepted: 31 March 2020 © Springer Nature Switzerland AG 2020

Abstract In this study, the effects of nanoparticles added to a newly developed hybrid composite material are examined. We investigated enhancing mechanical properties of plain weave (PW) carbon and glass fiber fabric/epoxy resin hybrid composite material we had developed by adding nanomaterials into the composition. For this purpose, we selected silica (­ SiO2) nanoparticles and carbon nanotubes (CNT). The two different nanomaterials are added into epoxy resin (L160) in four different combinations, which are S­ iO2, CNT + SiO2 and CNT together and none, and in five different thickness, which are laminations of three, five, seven, eleven and fifteen layers. We then tested these four mixtures in five thickness making up twenty combinations in the area of mechanical properties using tension test methods. Results of the tests in stress– strain graphs are shared in detail by displaying the mechanical properties of epoxy hybrid composite materials in tables and load-extension figures. The results and their causes are discussed giving a general conclusion of the nanomaterial enhancement properties of the new hybrid composite. Keywords  Hybrid composites · Nano materials · Epoxy · Mechanical properties · Tension tests

1 Introduction For decades, polymer matrix based nanocomposites have been used, studied and investigated intensely in all engineering disciplines and some industrial areas i.e. defense, automotive, space, etc. In particularly, epoxy polymer composites reinforced with nanomaterials have continually attracted growing interest due to their specialty and ravishing properties as well as their exclusive applications in various industrial areas. The nanomaterials used in epoxy polymer composites notably improve their mechanical properties and performance. The properties of epoxy polymer nanocomposites depend upon the chemistry of matrices, nature, and uniformity of nanomaterials in matrices and the method in which they are set up for attaining desired mechanical properties and physical characteristics.

In this sense, glass and carbon weave fibers and nanomaterials reinforced polymer epoxy composites products using vacuum-assisted resin transfer molding (VARTM) method improving properties such as strength, conductivity, gas permeability, transparency, and non-flammability compared to unmodified polymers as well as polymerbased composite materials used in various fields. Especially in automotive, aerospace and packaging industries as well as the polymer hybrid nanocomposites are widely used for several areas, but technical orders in terms of production processes, mechanical properties, impact resistance, and the damage mechanisms are scant. Additionally, in the literature, there are numerous articles related to this subject and especially some researchers have investigated and studied mechanical and other prop