205 Interfacial Strength of Carbon Fibers Reclaimed from CFRP Using Supercritical Fluids

Abstract

Carbon-fiber reinforced epoxy was decomposed using supercritical methanol to reclaim carbon fibers. The tensile and interfacial strength of the reclaimed carbon fibers was measured. The tensile strength decreased by 2-10% after decomposition treatment. The interfacial strength decreased by 23-25% after decomposition treatment XPS analysis revealed that functional groups on carbon fibers reduced due to treatment. In addition, the interlaminar shear strength of composite plates was measured. The interlaminar shear strength was not affected by the decrease of interfacial strength.