G040031 カーボンナノファイバー添加PTFE膜の電気的特性に及ぼす分散状態の影響([G04003]機械材料・材料加工部門一般セッション(3))

抄録

Fluoropolymers have very low friction and various unique properties. Therefore, they are expected to be applied for sliding materials. However, because of the insulation, it is easy to accumulate static electricity. Hence, to apply to sliding materials there is need to provide electrical conductivity. Nano Carbon is expected as one of the conductive fillers that can effectively improve the electrical property by a small amount of addition, so many researchers studied about composite materials filled with nano carbon. However, because nano carbon is easily agglomerated, the problem that steady electric conductive cannot be obtained is pointed out. In this study, we prepared Carbon nanofiber (CNF) filled Polytetrafluoroethylene (PTFE) films by spin coating method, and evaluated the surface resistivity of the composite film and dispersion status of CNF, and investigated relationship between electrical conductivity and dispersion status of CNF. As a result, when the condition of ultrasonic dispersion is optimized in the case of 2wt% CNF/PTFE composite film, by optimizing the conditions of ultrasonic dispersion process, the surface resistivity of composite film has decreased to 1/100 compared with no dispersion process.