| 초록 |
Self-sensing was evaluated for carbon nanofiber (CNF)/epoxy composites with different aspect ratio. Volumetric electrical resistance was measured to evaluate the dispersion degree comparatively. Apparent modulus and contact resistivity change were correlated as functions of different aspect ratio and added CNF concentrations. Interfacial adhesion of CNF/epoxy with different aspect ratio was different from each other based on dispersion state and their possible percolation structures. CNF A and D types showed different trends on the dispersion and work of adhesion, Wa, and micromechanical apparent modulus. Work of adhesion of CNF D type showed higher than CNF type A due to better alignment and thus higher apparent modulus. Acknowledgement: This research was supported by Yunhak Project from Korea Research Institute of Standard and Science (KRISS). Jang, Jung-Hoon is grateful to the second stage of BK21 program for supporting a fellowship. |
