Characterization of poly(amido amine) functionalized graphene nanocomposites

Fiber reinforced polymeric matrix composite materials provide many advantages for physical and chemical properties. These are ;high mechanical strength, dimensional and thermal stability, hardness, wear resistance and low density properties. However, when considering the electrical properties, the resin material in the polymeric composite has only only 1% conductivity value of that of metals. Carbon fibers have high transmission characteristics. The reinforcement shape and direction of fiber with the electric current direction is important. Dendrimers increase the fiber-matrix adsorption performance thanks to inovative macro-moleculer structures. Thus, they can react as a bridge to connect the matrix and carbon fibers together. In this study, in order to improve the electrical properties, PAMAM functionalized graphene oxide nanoparticles with the weight ratio %0,5, %1 ,%2 ,%4, %7 ,%10 ,%15 were added into the thermoset epoxy resin. Graphene oxide synthesized with two methods. These are Chemical oxidation and Hummers method. Thus, seven different composite materials have been manufactured. The change in electrical conductivity of these manufactured PAMAM functionalized nanoparticles reinforced carbon / epoxy laminated composite was examined in the direction of the fiber, in the other direction and thickness direction. On the other hand, electrical conductivity, interlaminar shear strength of the produced composite were investigated. Besides, graphene oxides have been characterized by FTIR, XPS, DSC- TGA measurements.