Effect of Electron Beam Irradiation on the Tensile Properties of Carbon Nanotube Sheets and Yarns

T.S. Williams, S.G. Miller, J.S. Baker, L.S. McCorkle, M.A. Meador
NASA Glenn Research Center, US

Keywords: carbon nanotubes, tensile strength, functionalization, fibers


Carbon nanotube sheets and yarns were irradiated using electron beam (e-beam) energy to determine the effect of irradiation dose on the tensile properties. Results showed that there was very little change in the tensile strength after irradiating CNT sheets for 20 minutes, and a slight decrease in tensile strength as the irradiation time approached 90 minutes. On the other hand, the addition of small molecules to the CNT sheet surface had a greater effect on the tensile properties of e-beam irradiated CNT sheets. Some functionalized CNT sheets displayed up to a 70% increase in tensile strength following 90 minutes of e-beam exposure. In addition, as-received CNT yarns showed a significant increase in tensile strength as the irradiation time increased.