Abstract
In this research, it was tried that controlling of direction of CNFs in a composite material by applied electric filed could be established. In the experiment, suspension which contains the CNFs in uncured epoxy resin without hardener was dropped between two pairs of cathodes. The ratio of frequencies of applied sinusoidal voltages and phase angle between the voltages was changed. The CNF arrangement configuration was varied with the phase angle, when the applied voltage frequencies were the same, although the configuration was not changed in the different frequency couples. Moreover, it was theoretically obtained that time average of moment of force occurred in a long, slender object in media that has high electric conductivity, like the CNF, is proportional to the difference of ‘principal square means of electric field’, and the time average of the moment of force becomes 0 when the long, slender object is arranged in the direction of ‘major principal square mean of electric field’. Based on the theoretical result, the direction and intensity of the CNF arrangement were estimated in the experimental condition, and the analytical result were compared with the experiment result. Furthermore, the reason that the configuration is not changed with the phase angle in the different frequency couples was theoretically demonstrated.
