| 초록 |
In this study, thermal conductive film was prepared using epoxy as matrix and graphite as filler. To enhance the dispersion of graphite in the epoxy matrix, fluorination treatment was conducted at room temperature using F2 and N2 gas. The chemical compositions of surface of the fluorinated graphite were investigated by X-ray photoelectron spectroscopy (XPS) and the dispersion of graphite in matrix were investigated by UV-Vis transmittance. The thermal conductivity of the prepared films was measured using laser flash method. XPS shows after fluorination treatment, fluorine functional group was introduced about 12 at% on the surface of graphite. In addition, UV-Vis transmittance of fluorinated graphite increased up to 77% than pristine graphite, and its thermal conductivity also increased about 65% compared to pristine graphite/epoxy film. It is attribute to electrostatic repulsion effect by fluorine functional group introduced on the graphite surface that enhanced dispersion stability. |
