Effect of Integration of Carbon Nanotubes (CNTs) on Compression after Impact Properties of Thermoset Composites
Özgür DEMİRCAN Kemal KADIOĞLU Pınar ÇOLAK Erdinç GÜNAYDIN
AbstractNanocomposite materials are obtained as a dispersion in a nanometer dimension within one second phase and are defined as at least two phase material groups. Carbon Nanotube is an allotropic of carbon element [1]. In other words, they are obtained by cylindrical wrapping of plates in the form of honey pellets. In shapely carbon nanotube structures, atoms are connected to each other by sp2 (like graphite), atoms form hexagonal geometry, and each atom has only three neighbours. Carbon nanotubes have high resistance to impacts such as compression, bending, twisting due to hole structures and high length / diameter ratios [2]. There are single-layer (single-walled) or multi-layer (multi-walled) carbon nanotubes. Previous scientific investigations have demonstrated that multi- walled CNTs (MWCNTs) have higher resistance to chemicals than single-walled CNTs (SWCNTs). Carbon nanotubes are one hundred times stronger than steel, and weight is one sixth. Steel is harder at the same time, but as flexible as plastic. Therefore, it is the most robust material known to have high corrosion resistance. [3] Because of these properties, CNTs have been used. In addition, if we look at the structure and properties of Epoxy; the low molecular weight of liquid immature epoxy resins gives them superior molecular mobility during processing. High strength thermoset polymers such as epoxy are added to glass fiber to increase mechanical strength and thermal stability [4]. This important feature allows the liquid epoxy resins to be quickly wetted to the surface. Fiber reinforced materials generally have more resistant structure than unreinforced materials. As the glass fiber ratio increases, the strength of the material increases [5]. Adding more fibers can increase tensile and impact strength, while layer delamination occurs under tensile, compressive and shear loading [4]. There are some studies on the improvement of interfacial and mechanical properties of thermoset composites by incorporating CNT into composites by fiber coating. From here it is aimed to increase the compression after impact properties of the new nanocomposites, which we will produce by improving the interface between resin and fiber, thus reaching new areas of use.