Abstract
Carbon nanotubes (CNTs) are highly expected as a reinforcement material for polymer composites because of their excellent mechanical properties. However, it is difficult to disperse CNTs in polymer matrix because CNTs tend to aggregate by Van der Waals force. In this study, CNT/epoxy composite was prepared using discharge dispersion method which is completely different from the conventional methods. Micro shock waves caused by discharge disperse CNTs, and furthermore, electrostatic repulsion decreases the reaggregation of CNTs. This discharge dispersion method is able to disperse CNTs in a short time and requires no special chemical agents. The dispersion state was observed using digital microscope and mechanical properties were studied by flexural tests. Although monodispersed CNTs were observed, CNT aggregates of ten-plus micro meter were also observed. The flexural modulus was increased by CNT dispersion. Compared to 0.00 wt %, flexural modulus was increased about 34 % when CNT content was 0.01 wt %.
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