The amount of textile wastes are growing day by day. In order to prevent the disposal of these wastes and to reduce the harm they cause to the environment, the reuse of waste textile materials in both textile and other sectors has increased considerably in recent years. One of these areas is the composite sector. In this study, aim is to improve the interfacial adhesion of cotton waste reinforced epoxy matrix composite structures. For this purpose, the cotton fibers are treated in sodium hydroxide (NaOH) solution in three different concentrations (0.5M, 1M, and 1.5M) at three different soaking times (1 hour, 3 hours and 5 hours) prior to composite production. The tensile strength of composite structures produced by vacuum infusion method is tested. The results show that the interfacial adhesion between the fibers and the matrix can be improved by NaOH treatment when the soaking time and the concentration of NaOH are optimized together. For samples that are treated with 1.5M NaOH solution for 3 hours have the maximum tensile strength values (53 MPa) among all samples, in 0° direction. Above 3h soaking time, tensile strength values of 1M and 1.5M samples show a tendency to decrease because of high NaOH concentration for longer time.
Anahtar Kelimeler: NaOH Treatment, Epoxy, Cotton Waste, Composite, Tensile Strength