Glass fiber materials are one of the fibers preferred in composite production. One of the most important disadvantages of such composites is that glass fiber cannot establish a strong bond with epoxy resin and the toughness of the materials produced is low. For this reason, nanoparticles are used to improve the strength of the material in the z-axis direction and the bond between fiber and epoxy. In this study, it was studied to improve the fiber-matrix interface behavior of composites and to increase composite toughness by adding 0.5% graphene to the material. Within the scope of the study, samples were produced by direct mixing method and spray method. Homogenous dispersion of graphene in the material is extremely important for the improvement of mechanical and thermal properties. Triton X-100 surfactant was used to ensure homogenous dispersion. Surfactant is expected to provide homogeneous distribution of graphene by forming a strong interface between the fiber and matrix phase. Three Point Bending Test, Dynamic Mechanical Analysis (DMA) and Scanning Electron Microscopy (SEM) Analysis were performed to investigate the mechanical and thermal properties of the produced samples. When the test results were analyzed, it was seen that the materials reached the highest flexural strength with the Spray Method. Thus, with the addition of 0.5% graphene, the flexural strength of the material increased by 2% in the Spray Method. On the other hand, according to the DMA analysis results, the amount of storage modulus decreases in all materials as the temperature increases.
Anahtar Kelimeler: Graphene, Spray Method, Direct Mixing Method, Z-Axis Properties, Glass Fiber, Epoxy
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